JPH0380155B2 - - Google Patents

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Publication number
JPH0380155B2
JPH0380155B2 JP18610584A JP18610584A JPH0380155B2 JP H0380155 B2 JPH0380155 B2 JP H0380155B2 JP 18610584 A JP18610584 A JP 18610584A JP 18610584 A JP18610584 A JP 18610584A JP H0380155 B2 JPH0380155 B2 JP H0380155B2
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Prior art keywords
compound
formula
ether
compound represented
reaction
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JP18610584A
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Japanese (ja)
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JPS6163675A (en
Inventor
Takeshi Ooishi
Tadashi Nakada
Kunio Saito
Shigeto Nagao
Nobuyuki Mori
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RIKEN
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RIKEN
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Priority to JP18610584A priority Critical patent/JPS6163675A/en
Publication of JPS6163675A publication Critical patent/JPS6163675A/en
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Description

【発明の詳細な説明】[Detailed description of the invention]

(発明の技術分野) 本発明は、新規なラクトン化合物及びその合成
法に関する。 (発明の背景) 近年、1,3−ポリオール系を含む生理活性天
然物、例えば、イオノフオア、ポリエン及びポリ
オキソマクロライド系抗生物質の合成研究が活発
になされている。 上記生理活性天然物の例としては、イオノフオ
ア抗生物質として、抗菌活性を有するポロマイシ
ン(Boromycin)(A),アプラスモマイシン
(Aplasmomycin)を挙げることができ、その構
造は、次に示される。 本発明者らは、先にSyn−1,3−ポリオール
の合成法を開発したが、この合成法を利用して、
ポロマイシン(A),アプラスモマイシン(B)のC3
C10(C3′−C10′にも相当)部分を立体選択的に合成
できれば、上記抗生物質の合成が極めてし易くな
る。 (発明の目的) 本発明は、抗菌活性を有するイオノフオア抗生
物質、ポロマイシン、アプラスモマイシンのC3
−C10部分に相当するフラグメント化合物を合成
することにある。 (発明の構成) <出発物質の合成> 本発明の出発物質(1)は、光学活性l−リンゴ酸
より導かれるδ−ラクトン()より、次の工程
によつて得られる。 <目的化合物の合成> 出発物質(1)を酸化して、アルデヒド(2)を得る。
酸化剤としては、ピリジニウムクロロクロメイト
−塩化メチレン、ピリジニウムジクロメイト−ジ
クロルメタン、ジヨーンズ試薬−アセトンが好適
である。 反応温度、反応時間は、それぞれ0℃〜室温、
1〜12時間が適当である。 得られたアルデヒド(2)を、リチウムジイソプロ
ピルアミン(LDA)及びCH3COOtBuと反応さ
せ、β−ヒドロキシエステル(3)を得る。溶媒は、
テトラヒドロフラン(THF)が適当である。 反応温度、反応時間は、それぞれ、−40〜78℃、
0.5〜5時間が適当である。 得られたβ−ヒドロキシエステル(3)を酸処理し
てラクトン(4)を得る。用いる酸は、濃硫酸、トル
エンスルホン酸(p−TsOH)、メタンスルホン
酸、ポリリン酸等が好適である。 得られたラクトン(4)を、イミダゾールの存在
下、tBuPh2SiClと反応させて、シリルラクトン(5)
を得る。溶媒としては、ジメチルホルムアミドが
適当である。 反応温度は、室温でよく、又反応時間は、3〜
6時間が適当である。 得られたシリルラクトン(5)を、酸触媒存在下で
エチルビニルエーテルと反応させて、エトキシエ
チル体(6)を得る。酸触媒としては、ピリジニウム
p−トルエンスルホネート(PPts)、カンフアー
スルホン酸、トルエンスルホン酸等が好適であ
る。 溶媒は、塩化メチレン、ジクロルエタン、エー
テル等が適当である。 反応温度、反応時間は、それぞれ、室温〜0℃
と、0.5〜3時間が適当である。 得られたエトキシエチル体(6)を、LDA及び
CH3COOtBuと反応させて、ヘミアセタール(7)を
得る。 反応条件は、アルデヒド(2)からβ−ヒドロキシ
エステル(3)を得る場合と同様である。 得られたヘミアセタール(7)を、オルトギ酸エス
テル、カンフアースルホン酸と反応させて、4β
−アルコール(8)及び4α−アルコール(9)を得る。 溶媒は、メタノール−塩化メチレン、メタノー
ル等が適当である。 反応温度、反応時間は、それぞれ−40〜−78
℃、0.5〜5時間が適当である。 なお、4α−アルコール(9)は、ピリジニウムク
ロロクロメイト及びモレキユラー・シーブを用い
て、酸化してケトン(10)となし、これを、K−セレ
クトライド
(Technical Field of the Invention) The present invention relates to a novel lactone compound and a method for synthesizing the same. (Background of the Invention) In recent years, synthetic research on physiologically active natural products containing 1,3-polyols, such as ionophores, polyenes, and polyoxomacrolide antibiotics, has been actively conducted. Examples of the above-mentioned physiologically active natural products include ionophore antibiotics such as poromycin (A) and aplasmomycin, which have antibacterial activity, and the structures thereof are shown below. The present inventors previously developed a synthesis method for Syn-1,3-polyol, and using this synthesis method,
C 3 − of poromycin (A), aplasmomycin (B)
If the C 10 (also corresponding to C 3 ′-C 10 ′) moiety could be synthesized stereoselectively, the above antibiotics would be extremely easy to synthesize. (Object of the invention) The present invention is directed to the C 3
-The aim is to synthesize a fragment compound corresponding to the C10 moiety. (Structure of the Invention) <Synthesis of Starting Material> The starting material (1) of the present invention is obtained from δ-lactone () derived from optically active l-malic acid by the following process. <Synthesis of target compound> Starting material (1) is oxidized to obtain aldehyde (2).
Suitable oxidizing agents include pyridinium chlorochromate-methylene chloride, pyridinium dichromate-dichloromethane, and Johns' reagent-acetone. The reaction temperature and reaction time are 0°C to room temperature, respectively.
1 to 12 hours is appropriate. The obtained aldehyde (2) is reacted with lithium diisopropylamine (LDA) and CH 3 COO t Bu to obtain β-hydroxy ester (3). The solvent is
Tetrahydrofuran (THF) is suitable. The reaction temperature and reaction time were -40 to 78℃, respectively.
0.5 to 5 hours is appropriate. The obtained β-hydroxy ester (3) is treated with an acid to obtain a lactone (4). The acid used is preferably concentrated sulfuric acid, toluenesulfonic acid (p-TsOH), methanesulfonic acid, polyphosphoric acid, or the like. The obtained lactone (4) was reacted with tBuPh 2 SiCl in the presence of imidazole to form the silyllactone (5).
get. Dimethylformamide is suitable as a solvent. The reaction temperature may be room temperature, and the reaction time may be 3 to 30 minutes.
6 hours is appropriate. The obtained silyl lactone (5) is reacted with ethyl vinyl ether in the presence of an acid catalyst to obtain an ethoxyethyl compound (6). As the acid catalyst, pyridinium p-toluenesulfonate (PPts), camphorsulfonic acid, toluenesulfonic acid, etc. are suitable. Suitable solvents include methylene chloride, dichloroethane, ether, and the like. Reaction temperature and reaction time are room temperature to 0°C, respectively.
0.5 to 3 hours is appropriate. The obtained ethoxyethyl compound (6) was treated with LDA and
Reaction with CH 3 COO t Bu gives hemiacetal (7). The reaction conditions are the same as those for obtaining β-hydroxy ester (3) from aldehyde (2). The obtained hemiacetal (7) was reacted with orthoformic acid ester and camphorsulfonic acid to form 4β
-Alcohol (8) and 4α-alcohol (9) are obtained. Suitable solvents include methanol-methylene chloride, methanol, and the like. Reaction temperature and reaction time are −40 to −78, respectively.
°C for 0.5 to 5 hours is appropriate. In addition, 4α-alcohol (9) is oxidized to ketone (10) using pyridinium chlorochromate and molecular sieve, which is converted into K-selectride.

【式】L−セレクト ライド[Formula] L-Select ride

〔(3)の物理的性質〕[Physical properties of (3)]

NMR(CDCl3):δ0.81,0.85,0.89,0.95(each
s;4×Me) 1.35,1.40,1.41,1.47(each s;4×Me) 1.47,1.48(each s;tBu) IR(neat):3500,1730cm-1 実施例 3 β−ヒドロキシエステル(3)530mgのメタノール
5.5ml溶液に水0.45ml、濃HCl,92μを加え室温
22.5時間撹拌した。 反応後溶媒留去後、ベンゼン、ついで酢酸エチ
ルにて共沸後、残渣をシリカゲルフラツシユカラ
ム(酢酸エチル)に付すと、ラクトン(4)278mgが
得られた。 〔(4)の物理的性質〕 NMR(CDCl3):δ0.98,1.00,1.12,1.15(each
s;4×Me) 4.10(dd,J−5.6,3.2Hz;C2〓−H) 4.59(dd,J−6.6,3.7Hz;C2〓−H) IR(neat):3300,1720cm-1 実施例 4 ラクトン(4)2.19のジメチルホルムアミド20ml溶
液にイミダゾール2.27gを加え、氷冷撹拌下t
BuPh2SiCl3.6mlを滴下し同温1.5時間撹拌した。 反応後エーテルを加え、飽和食塩水、水にて洗
浄後、MgSO4で乾燥した。 溶媒留去後、残渣をシリカゲルフラツシユカラ
ムクロマト(ヘキサン:エーテル=1:4)に付
すとシリル体(5)4.57gが得られた。 〔(5)の物理的性質〕 NMR(CDCl3):0.97,0.98,1.06,1.09(each
s;4×Me) 1.05,1.06(each s;2×tBu) 4.03(dd,J−4.2,3.9Hz;C2〓−H) 4.38(dd,J−4.2,3.9Hz;C2〓−H) IR(neat):3450,1720cm-1 実施例 5 シリル体(5)4.45gの塩化メチレン25ml溶液にエ
チルビニルエーテル2.1ml、ピリジニウムp−ト
ルエンスルフオネート140mgを加え室温1時間15
分撹拌した。 反応後、飽和NaHCO3水溶液を加え、エーテ
ル抽出、エーテル層を飽和NaHCO3水溶液、飽
和食塩水で洗浄後MgSO4で乾燥した。溶媒留去
するとエトキシエチル体(6)5.2gが得られた。 〔(6)の物理的性質〕 NMR(CDCl3):δ0.85,0.87,0,97,0,98,
1.00,1.01,1.04,1.07(each s;8×Me) 1.06(s;tBu) IR(neat);1740cm-1 実施例 6 アルゴン気流下、−20〜−10℃でジイソプロピ
ルアミン3.4mlの無水テトラヒドロフラン50ml溶
液に1.58N−BuLi−ヘキサン溶液14.3mlを加え、
同温で30分撹拌、ついで−78℃でCHCOOtBu3.2
mlを滴下し30分撹拌後、ラクトン(6)5.197gの無
水テトラヒドロフラン25ml溶液を滴下し−78℃で
40分撹拌した。 反応後飽和NaHCO3水溶液を加え、室温にも
どしエーテル抽出、エーテル層を飽和食塩水で洗
浄後、MgSO4で乾燥した。溶媒留去するとヘミ
アセタール(7)6.44gが得られた。 〔(7)の物理的性質〕 NMR(CDCl3):δ0.73,0.74,0.80,0.86,0.87,
0.90,0.97,1.06(each s;8×Me) 1.03,1.05(each s;2×SitBu) 1.41,1.42(each s;2×COOtBu) IR(neat):3450,1720cm-1 実施例 7 ヘミアセタール(7)6.328gの塩化メチレン15ml
−メタノール15ml溶液にオルトギ酸メチル8ml、
カンフアースルホン酸224mgを加え、室温40分撹
拌した。反応後飽和NaHCO3水溶液を加えエー
テル抽出、エーテル層を飽和NaHCO3水溶液、
飽和食塩水で洗浄後、MgSO4で乾燥した。溶媒
留去後、残渣をシリカゲルフラツシユカラムクロ
マト(ヘキサン:エーテル=4:1、3:1、
2:1、1:1)に付すと4β−アルコール(8)
2.136g及び4α−アルコール(9)2.800gが得られ
た。 〔(8)の物理的性質〕 NMR(CDCl3):δ0.75,0.90(each s;2×Me) 1.04,1.46(each s;2×tBu) 2.03(dd,J−14.6,2.9Hz;C5〓−H) 2.18(dd,J−14.6,3.4Hz;C5〓−H) 2.49,2.72(each d,J=13.7Hz;CH2COO) 3.39(s;OMe) IR(neat):3510,1730cm-1 〔α〕25 D+36.9゜(C−2.02,CHCl3) 〔(9)の物理的性質〕 NMR(CDCl3):δ0.71,0.88(each s;2×Me) 1.03,1.46(each s;2×tBu) 1.77(dd,J−13.2,12.0Hz;C5〓−H) 2.07(dd,J−13.2,4.9Hz;C5〓−H) 2.51,2.75(each α,J=13.7Hz;CH2COO) 3.32(s;OMe) IR(neat):3450,1730cm-1 〔α〕25 D+33.9゜(C−2.05,CHCl3) 実施例 8 ピリジニウムクロロクロメート3.077g及び3A
−モレキユラーシーブス3.570gの塩化メチレン
65mlけんだく液に氷冷下3α−アルコール(9)2.583
gの塩化メチレン25ml溶液を加え同温30分、室温
1時間撹拌した。 反応後エーテル180mlを加えフロリジルカラム
クロマト(エーテル)に付し、粗ケトン(10)を得、
さらにシリカゲルカラムクロマト(ヘキサン:エ
ーテル=4:1)で精製しケトン(10)2.435gを得
た。 〔(10)の物理的性質〕 NMR(CDCl3):δ0.97,1.01(それぞれs;2×
Me) 1.04,1.47(それぞれs;2・tBu) 2.55(d,J−15.1Hz;C5〓−H) 2.72(s;CH2COO) 3.12(d,J−15.1Hz;C5〓−H) 3.31(s;OMe) IR(neat):1720cm-1 〔α〕22 D+50.8゜(C−2.00;CHCl3) 実施例 9 アルゴン気流下−78℃でケトン(10)485mgの無水
テトラヒドロフラン10ml溶液にL−Selectride
(1Mテトラヒドロフラン溶液)1.9mlを滴下し同
温2時間撹拌した。 反応後水を加え室温にもどしエーテル抽出、エ
ーテル層を飽和食塩水で洗浄後MgSO4で乾燥し
た。 溶媒留去後残渣をシリカゲルフラツシユカラム
クロマト(ヘキサン:エーテル=4:1)に付す
る。4β−アルコール(8)400mgが得られた。 これはより得たと機器データが一致した。 実施例 10 アルゴン気流下−40〜−50℃で4β−アルコー
ル(8)200mgの1,3−プロパンジチオール3.7ml溶
液にBF3.Et2O0.46mlを滴下し同温4時間撹拌し
た。 反応後、溶媒を減圧留去し残渣をシリカゲル分
取薄層クロマト(酢酸エチル)に付すと、ラクト
(11)57mgが得られた。 〔(11)の物理的性質〕 NMR(CDCl3):0.97,1.05(それぞれs;2×
Me) 2.02(dd,J−14.2,12.0Hz;C5〓−H) 2.58(dd,J−14.2,2.9,1.7Hz;C5〓−H) 2.90(d,J−17.3Hz;C7〓−H) 3.18(dd,J−17.3,1.7Hz;C7〓−H) 4.68(dd,J−12.0,2.9Hz;C4〓−H) 実施例 11 ラクトン(11)170mgの塩化メチレン8.5ml溶液に
2,2−ジメトキシプロパン8.5ml、カンフアー
スルホン酸5mgを加え室温30分撹拌した。 反応後飽和NaHCO3水溶液を加え、エーテル
抽出、エーテル層を飽和NaHCO3水溶液、飽和
食塩水で洗浄後MgSO4で乾燥した。 溶媒留去後、残渣をシリカゲルフラツシユカラ
ムクロマト(ヘキサン:エーテル=1:2)に付
すとアセトナイド(12)164.5mgが得られた。 〔(11)の物理的性質〕 NMR(CDCl3):δ0.94,1.07(それぞれd,2×
Me) 1.34,1.41(それぞれd,2×Me) 2.93(d,J−17.3Hz;C7〓−H) 3.20(dd,J−17.3,1.95Hz;C7〓−H) 3.76(dd,J−8.1,7.6Hz;C1−Ha) 3.95(dd,J−8.1,6.6Hz;C1−Hb) 4.12(dd,J−7.6,6.6Hz;C2−H) 4.48(dd,J−12.0,3.2Hz;C4〓−H) IR(CCl4):1745cm-1 実施例 12 ラクトン(12)48mgのジオキサン6ml溶液にRaney
−Ni−ジオキサンけんだく液2mlを加え45分還
流した。 反応後Raney−Niを別、エタノールで洗浄
し、液を留去し、残渣をシリカゲル分取薄層ク
ロマト(ヘキサン:エーテル=1:8)に付す
と、ラクトン(13)26mgが得られた。 〔(13)の物理的性質〕 NMR(CDCl3):δ0.89,1.05(s;2×Me) 1.33,1.40(s;2×Me) IR(CHCl3):1720cm-1 実施例 13 アルゴン気流下0℃でジイソプロピルアミン
76μの無水テトラヒドロフラン2ml溶液にヘキ
サメチルホスフオラストリアミド100μ1.60N−
BuLi−ヘキサン溶液0.34mlを加え10分間撹拌、
ついで−78℃でラクトン(13)102mgの無水テト
ラヒドロフラン3ml溶液を加え30分撹拌、更に
MeI130μを加え−78゜〜−30゜で撹拌した。 5時間20分後MeI100μを加え、冷凍庫に一晩
放置した。 反応後飽和NaHCO3溶液を加えエーテル抽出。
飽和食塩水で洗浄後MgSO4で乾燥した。 溶媒留去後、残渣をシリカゲルフラツシユクロ
マト(ヘキサン:エーテル=1:2)に付すとモ
ノメチル体(14)68mgが得られた。 〔(14)の物理的性質〕 NMR(CDCl3):δ0.88,0.89,1.04,1.05(each
s;4×Me) 1.22(d,J−6.8Hz;C7−Me) 1.30(d,J−6.8Hz;C7−Me) 1.33,1.40(each s;2×Me) IR(neat):1735cm-1 実施例 14 ラクトン(14)9mgのt−ブタノール2ml溶液
にt−BuOK少量を加え85℃で3時間撹拌した。 反応後10%HClを加え、エーテル抽出、エーテ
ル層を飽和食塩水、飽和NaHCO3水溶液、飽和
食塩水で洗浄後MgSO4で乾燥した。溶媒留去後
シリカゲルフラツシユカラムクロマト(ヘキサ
ン:エーテル=1:1)に付すとラクトン(15)
4mgが得られた。 〔(15)の物理的性質〕 NMR(CDCl3):δ0.88,1.04(each s;2×
Me) 1.33,1.40(each s;2×Me) 1.30(d,J−6.8Hz;Me) IR(neat):1735cm-1
NMR (CDCl 3 ): δ0.81, 0.85, 0.89, 0.95 (each
s; 4×Me) 1.35, 1.40, 1.41, 1.47 (each s; 4×Me) 1.47, 1.48 (each s; t Bu) IR (neat): 3500, 1730cm -1 Example 3 β-Hydroxy ester (3) 530 mg methanol
Add 0.45 ml of water, concentrated HCl, 92μ to the 5.5 ml solution and bring to room temperature.
Stirred for 22.5 hours. After the reaction, the solvent was distilled off, and after azeotropic distillation with benzene and then ethyl acetate, the residue was applied to a silica gel flash column (ethyl acetate) to obtain 278 mg of lactone (4). [Physical properties of (4)] NMR (CDCl 3 ): δ0.98, 1.00, 1.12, 1.15 (each
s; 4×Me) 4.10 (dd, J-5.6, 3.2Hz; C 2 〓-H) 4.59 (dd, J-6.6, 3.7Hz; C 2 〓-H) IR (neat): 3300, 1720cm -1 Example 4 Add 2.27 g of imidazole to 20 ml of dimethylformamide solution of lactone (4) 2.19, and stir under ice cooling.
3.6 ml of BuPh 2 SiCl was added dropwise and stirred at the same temperature for 1.5 hours. After the reaction, ether was added, washed with saturated brine and water, and dried over MgSO 4 . After distilling off the solvent, the residue was subjected to silica gel flash column chromatography (hexane:ether=1:4) to obtain 4.57 g of silyl compound (5). [Physical properties of (5)] NMR (CDCl 3 ): 0.97, 0.98, 1.06, 1.09 (each
s; 4×Me) 1.05, 1.06 (each s; 2× t Bu) 4.03 (dd, J-4.2, 3.9Hz; C 2 〓-H) 4.38 (dd, J-4.2, 3.9Hz; C 2 〓- H) IR (neat): 3450, 1720cm -1 Example 5 Add 2.1 ml of ethyl vinyl ether and 140 mg of pyridinium p-toluenesulfonate to a solution of 4.45 g of silyl compound (5) in 25 ml of methylene chloride at room temperature for 1 hour.
Stir for 1 minute. After the reaction, saturated NaHCO 3 aqueous solution was added, ether extraction was performed, and the ether layer was washed with saturated NaHCO 3 aqueous solution and saturated brine, and then dried over MgSO 4 . When the solvent was distilled off, 5.2 g of ethoxyethyl compound (6) was obtained. [Physical properties of (6)] NMR (CDCl 3 ): δ0.85, 0.87, 0,97, 0,98,
1.00, 1.01, 1.04, 1.07 (each s; 8×Me) 1.06 (s; t Bu) IR (neat); 1740cm -1 Example 6 Under an argon atmosphere, 14.3 ml of a 1.58N-BuLi-hexane solution was added to a solution of 3.4 ml of diisopropylamine in 50 ml of anhydrous tetrahydrofuran at -20 to -10°C.
Stir for 30 minutes at the same temperature, then CHCOO t Bu3.2 at -78℃
After stirring for 30 minutes, a solution of 5.197 g of lactone (6) in 25 ml of anhydrous tetrahydrofuran was added dropwise at -78℃.
Stirred for 40 minutes. After the reaction, saturated NaHCO 3 aqueous solution was added, the mixture was returned to room temperature, extracted with ether, and the ether layer was washed with saturated brine and dried over MgSO 4 . When the solvent was distilled off, 6.44 g of hemiacetal (7) was obtained. [Physical properties of (7)] NMR (CDCl 3 ): δ0.73, 0.74, 0.80, 0.86, 0.87,
0.90, 0.97, 1.06 (each s; 8 x Me) 1.03, 1.05 (each s; 2 x Si t Bu) 1.41, 1.42 (each s; 2 x COO t Bu) IR (neat): 3450, 1720cm -1 implementation Example 7 Hemiacetal (7) 6.328g methylene chloride 15ml
-8 ml of methyl orthoformate in 15 ml of methanol solution;
224 mg of camphorsulfonic acid was added, and the mixture was stirred at room temperature for 40 minutes. After the reaction, add saturated NaHCO 3 aqueous solution, extract with ether, and extract the ether layer with saturated NaHCO 3 aqueous solution,
After washing with saturated brine, it was dried with MgSO 4 . After evaporating the solvent, the residue was subjected to silica gel flash column chromatography (hexane:ether = 4:1, 3:1,
2:1, 1:1) gives 4β-alcohol (8)
2.136 g and 2.800 g of 4α-alcohol (9) were obtained. [Physical properties of (8)] NMR (CDCl 3 ): δ0.75, 0.90 (each s; 2 × Me) 1.04, 1.46 (each s; 2 × t Bu) 2.03 (dd, J-14.6, 2.9Hz ;C 5 〓-H) 2.18 (dd, J-14.6, 3.4Hz; C 5 〓-H) 2.49, 2.72 (each d, J=13.7Hz; CH 2 COO) 3.39 (s; OMe) IR (neat) :3510, 1730cm -1 [α] 25 D +36.9° (C-2.02, CHCl 3 ) [Physical properties of (9)] NMR (CDCl 3 ): δ0.71, 0.88 (each s; 2×Me ) 1.03, 1.46 (each s; 2× t Bu) 1.77 (dd, J-13.2, 12.0Hz; C 5 〓-H) 2.07 (dd, J-13.2, 4.9Hz; C 5 〓-H) 2.51, 2.75 (each α, J=13.7Hz; CH 2 COO) 3.32 (s; OMe) IR (neat): 3450, 1730 cm -1 [α] 25 D +33.9° (C-2.05, CHCl 3 ) Example 8 Pyridinium chlorochromate 3.077g and 3A
- Molecular sieves 3.570 g methylene chloride
3α-alcohol (9) 2.583 in 65ml suspension under ice cooling
25 ml of methylene chloride solution was added thereto, and the mixture was stirred at the same temperature for 30 minutes and then at room temperature for 1 hour. After the reaction, 180ml of ether was added and subjected to Florisil column chromatography (ether) to obtain crude ketone (10) .
Further purification was performed using silica gel column chromatography (hexane:ether=4:1) to obtain 2.435 g of ketone (10) . [Physical properties of (10)] NMR (CDCl 3 ): δ0.97, 1.01 (s; 2×
Me) 1.04, 1.47 (s; 2・t Bu respectively) 2.55 (d, J-15.1Hz; C 5 〓-H) 2.72 (s; CH 2 COO) 3.12 (d, J-15.1Hz; C 5 〓- H) 3.31 (s; OMe) IR (neat): 1720 cm -1 [α] 22 D +50.8° (C-2.00; CHCl 3 ) Example 9 L-Selectride was added to a solution of 485 mg of ketone (10) in 10 ml of anhydrous tetrahydrofuran at -78°C under an argon atmosphere.
1.9 ml (1M tetrahydrofuran solution) was added dropwise and stirred at the same temperature for 2 hours. After the reaction, water was added and the mixture was returned to room temperature, extracted with ether, and the ether layer was washed with saturated brine and dried over MgSO 4 . After the solvent was distilled off, the residue was subjected to silica gel flash column chromatography (hexane:ether=4:1). 400 mg of 4β-alcohol (8) was obtained. The device data agreed with 8 obtained from 7 . Example 10 0.46 ml of BF 3 .Et 2 O was added dropwise to a solution of 200 mg of 4β-alcohol (8) in 3.7 ml of 1,3-propanedithiol at −40 to −50° C. under an argon stream and stirred at the same temperature for 4 hours. After the reaction, the solvent was distilled off under reduced pressure and the residue was subjected to silica gel preparative thin layer chromatography (ethyl acetate) to obtain 57 mg of lactone (11) . [Physical properties of (11)] NMR (CDCl 3 ): 0.97, 1.05 (s; 2×
Me) 2.02 (dd, J-14.2, 12.0Hz; C 5 〓-H) 2.58 (dd, J-14.2, 2.9, 1.7Hz; C 5 〓-H) 2.90 (d, J-17.3Hz; C 7 〓 -H) 3.18 (dd, J-17.3, 1.7Hz; C 7 〓-H) 4.68 (dd, J-12.0, 2.9Hz; C 4 〓-H) Example 11 To a solution of 170 mg of lactone (11) in 8.5 ml of methylene chloride were added 8.5 ml of 2,2-dimethoxypropane and 5 mg of camphorsulfonic acid, and the mixture was stirred at room temperature for 30 minutes. After the reaction, saturated NaHCO 3 aqueous solution was added, ether extraction was performed, and the ether layer was washed with saturated NaHCO 3 aqueous solution and saturated brine, and then dried over MgSO 4 . After evaporating the solvent, the residue was subjected to silica gel flash column chromatography (hexane:ether = 1:2) to obtain 164.5 mg of acetonide (12). [Physical properties of (11)] NMR (CDCl 3 ): δ0.94, 1.07 (d, 2×
Me) 1.34, 1.41 (d, 2 × Me, respectively) 2.93 (d, J-17.3Hz; C 7 〓-H) 3.20 (dd, J-17.3, 1.95Hz; C 7 〓-H) 3.76 (dd, J -8.1, 7.6Hz; C 1 -Ha) 3.95 (dd, J-8.1, 6.6Hz; C 1 -Hb) 4.12 (dd, J-7.6, 6.6Hz; C 2 -H) 4.48 (dd, J-12.0 , 3.2Hz; C 4 〓-H) IR (CCl 4 ): 1745 cm -1 Example 12 Raney in a solution of 48 mg of lactone (12) in 6 ml of dioxane.
2 ml of -Ni-dioxane suspension was added and refluxed for 45 minutes. After the reaction, the Raney-Ni was separated, washed with ethanol, the liquid was distilled off, and the residue was subjected to silica gel preparative thin layer chromatography (hexane:ether = 1:8) to obtain 26 mg of lactone (13). [Physical properties of (13)] NMR (CDCl 3 ): δ0.89, 1.05 (s; 2 × Me) 1.33, 1.40 (s; 2 × Me) IR (CHCl 3 ): 1720 cm -1 Example 13 Diisopropylamine at 0°C under argon stream.
100μ 1.60N of hexamethylphosphorustriamide in 2ml of 76μ anhydrous tetrahydrofuran solution.
Add 0.34ml of BuLi-hexane solution and stir for 10 minutes.
Then, at -78°C, a solution of 102 mg of lactone (13) in 3 ml of anhydrous tetrahydrofuran was added, stirred for 30 minutes, and then stirred for 30 minutes.
130μ of MeI was added and stirred at -78° to -30°. After 5 hours and 20 minutes, 100μ of MeI was added, and the mixture was left in the freezer overnight. After the reaction, add saturated NaHCO 3 solution and extract with ether.
After washing with saturated brine, it was dried with MgSO 4 . After distilling off the solvent, the residue was subjected to silica gel flash chromatography (hexane:ether=1:2) to obtain 68 mg of monomethyl compound (14). [Physical properties of (14)] NMR (CDCl 3 ): δ0.88, 0.89, 1.04, 1.05 (each
s; 4×Me) 1.22 (d, J-6.8Hz; C 7 −Me) 1.30 (d, J-6.8Hz; C 7 −Me) 1.33, 1.40 (each s; 2×Me) IR (neat): 1735cm -1 Example 14 A small amount of t-BuOK was added to a solution of 9 mg of lactone (14) in 2 ml of t-butanol, and the mixture was stirred at 85°C for 3 hours. After the reaction, 10% HCl was added, ether was extracted, and the ether layer was washed with saturated brine, saturated NaHCO 3 aqueous solution, and saturated brine, and then dried over MgSO 4 . After evaporation of the solvent, the lactone (15) was subjected to silica gel flash column chromatography (hexane:ether = 1:1).
4 mg was obtained. [Physical properties of (15)] NMR (CDCl 3 ): δ0.88, 1.04 (each s; 2×
Me) 1.33, 1.40 (each s; 2 x Me) 1.30 (d, J-6.8Hz; Me) IR (neat): 1735cm -1

Claims (1)

【特許請求の範囲】 1 式: (Meは、メチル基を示す。) で示される新規なラクトン化合物。 2 式: で示される化合物を酸化して、式 で示される化合物を得、該化合物をリチウムジイ
ソプロピルアミド及びCH3COO(t−C4H9)と反
応させて、式 で示される化合物を得、該化合物を酸処理して、
式: で示される化合物を得、該化合物を、ターシヤリ
ーブチルジフエニルシリルクロリドと反応させ
て、式: で示される化合物を得、該化合物をビニルエチル
エーテルと反応させて、式: (EEは、エトキシエチル基,RはSiPh2 tBuを
示す。) で示される化合物を得、該化合物をリチウムジイ
ソプロピルアミン及びCH3COOtBuと反応させ
て、式 (EE,Rは前記に同じ) で示される化合物を得、該化合物をオルトギ酸エ
ステルと反応させて、式: (Rは、前記に同じ) で示される化合物を得、該化合物をルイス酸の存
在下、プロパンジチオールと反応させて、式: で示される化合物を得、該化合物を、2,2−ジ
メトキシプロパンと反応させて、式: で示される化合物を得、該化合物を脱ジチオール
化して式: で示される化合物を得、該化合物をメチル化し
て、式: で示される化合物を得、該化合物をアルコラート
で処理して、式: で示される化合物を得ることを特徴とする新規な
ラクトン化合物の合成法。
[Claims] 1 Formula: (Me represents a methyl group.) A novel lactone compound represented by: 2 formula: By oxidizing the compound represented by the formula A compound represented by the formula A compound represented by is obtained, and the compound is treated with an acid,
formula: A compound of formula: A compound of formula: (EE is an ethoxyethyl group, R is SiPh 2 t Bu.) A compound represented by the formula is obtained, and this compound is reacted with lithium diisopropylamine and CH 3 COO t Bu to obtain the formula (EE, R are the same as above) A compound represented by: (R is the same as above) A compound represented by the formula is obtained, and the compound is reacted with propanedithiol in the presence of a Lewis acid, and the formula: A compound of formula: A compound represented by is obtained, and the compound is dedithiolated to give the formula: A compound represented by is obtained, and the compound is methylated to give the formula: and treatment of the compound with an alcoholate gives the formula: A novel method for synthesizing a lactone compound, which is characterized by obtaining a compound represented by:
JP18610584A 1984-09-05 1984-09-05 Novel lactone compound and its synthesis method Granted JPS6163675A (en)

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JPH0380155B2 true JPH0380155B2 (en) 1991-12-24

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