ES338535A1 - A process for the preparation of l-(-)- -methyl- -(3,4-dihydroxy-phenyl)-alanine - Google Patents
A process for the preparation of l-(-)- -methyl- -(3,4-dihydroxy-phenyl)-alanineInfo
- Publication number
- ES338535A1 ES338535A1 ES338535A ES338535A ES338535A1 ES 338535 A1 ES338535 A1 ES 338535A1 ES 338535 A ES338535 A ES 338535A ES 338535 A ES338535 A ES 338535A ES 338535 A1 ES338535 A1 ES 338535A1
- Authority
- ES
- Spain
- Prior art keywords
- phenyl
- alanine
- methyl
- dihydroxy
- give
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D319/00—Heterocyclic compounds containing six-membered rings having two oxygen atoms as the only ring hetero atoms
- C07D319/04—1,3-Dioxanes; Hydrogenated 1,3-dioxanes
- C07D319/06—1,3-Dioxanes; Hydrogenated 1,3-dioxanes not condensed with other rings
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D265/00—Heterocyclic compounds containing six-membered rings having one nitrogen atom and one oxygen atom as the only ring hetero atoms
- C07D265/28—1,4-Oxazines; Hydrogenated 1,4-oxazines
- C07D265/30—1,4-Oxazines; Hydrogenated 1,4-oxazines not condensed with other rings
- C07D265/32—1,4-Oxazines; Hydrogenated 1,4-oxazines not condensed with other rings with oxygen atoms directly attached to ring carbon atoms
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
L - (-) - a - methyl - b - (3,4 - dihydroxy-phenyl)-alanine is prepared by reacting 3,4-dimethoxy - phenyl - acetone with an alkali metal cyanide and L - (+) - threo - 2,2 - dimethyl - 4 - phenyl - 1,3 - dioxan to give an optically active amino nitrile of the formula <FORM:1114017/C2/1> mixing said amino-nitrile with concentrated hydrochloric acid at a reduced temperature and subsequently warming up the reaction mixture, saponification taking place to give a lactone hydrochloride of the presumed formula <FORM:1114017/C2/2> which is then reacted with either hydrogen peroxide or Raney nickel and the resulting L-(-)-a - methyl - b - (3,4 - dimethoxyphenyl) - alanine is finally demethylated with hydrobromic acid.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEB86427A DE1279685B (en) | 1966-03-30 | 1966-03-30 | Process for the preparation of L - (-) - ª ‡ -Methyl-ª ‰ - (3, 4-dihydroxyphenyl) -alanine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES338535A1 true ES338535A1 (en) | 1968-04-01 |
Family
ID=6983361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES338535A Expired ES338535A1 (en) | 1966-03-30 | 1967-03-28 | A process for the preparation of l-(-)- -methyl- -(3,4-dihydroxy-phenyl)-alanine |
Country Status (13)
| Country | Link |
|---|---|
| AT (1) | AT273083B (en) |
| BE (1) | BE696268A (en) |
| CH (1) | CH456627A (en) |
| DE (1) | DE1279685B (en) |
| DK (1) | DK112173B (en) |
| ES (1) | ES338535A1 (en) |
| FI (1) | FI46500C (en) |
| FR (1) | FR1515769A (en) |
| GB (1) | GB1114017A (en) |
| IL (1) | IL27710A (en) |
| LU (1) | LU53300A1 (en) |
| NL (2) | NL6703322A (en) |
| SE (1) | SE309424B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2658942A1 (en) * | 1976-12-24 | 1978-07-06 | Basf Ag | Diastereomeric 4,4-di:substd.-2-imidazolin-5-one derivs. - prepd. by asymmetric induction, intermediates for optically pure aminoacid(s) such as methyl-DOPA |
-
0
- NL NL126737D patent/NL126737C/xx active
-
1966
- 1966-03-30 DE DEB86427A patent/DE1279685B/en active Pending
-
1967
- 1967-02-28 NL NL6703322A patent/NL6703322A/xx unknown
- 1967-03-23 GB GB1362867A patent/GB1114017A/en not_active Expired
- 1967-03-28 ES ES338535A patent/ES338535A1/en not_active Expired
- 1967-03-28 LU LU53300D patent/LU53300A1/xx unknown
- 1967-03-28 DK DK160667A patent/DK112173B/en unknown
- 1967-03-28 CH CH428867A patent/CH456627A/en unknown
- 1967-03-29 BE BE696268D patent/BE696268A/xx unknown
- 1967-03-29 IL IL2771067A patent/IL27710A/en unknown
- 1967-03-29 SE SE427967A patent/SE309424B/xx unknown
- 1967-03-29 AT AT299467A patent/AT273083B/en active
- 1967-03-29 FI FI91867A patent/FI46500C/en active
- 1967-03-30 FR FR100814A patent/FR1515769A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE1279685B (en) | 1968-10-10 |
| NL126737C (en) | |
| FI46500C (en) | 1973-04-10 |
| LU53300A1 (en) | 1967-05-29 |
| NL6703322A (en) | 1967-10-02 |
| BE696268A (en) | 1967-09-29 |
| FR1515769A (en) | 1968-03-01 |
| FI46500B (en) | 1973-01-02 |
| IL27710A (en) | 1970-12-24 |
| GB1114017A (en) | 1968-05-15 |
| CH456627A (en) | 1968-07-31 |
| DK112173B (en) | 1968-11-18 |
| SE309424B (en) | 1969-03-24 |
| AT273083B (en) | 1969-07-25 |
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