IE34074L - Cephalosporin derivatives from penicillins. - Google Patents

Cephalosporin derivatives from penicillins.

Info

Publication number
IE34074L
IE34074L IE700316A IE31670A IE34074L IE 34074 L IE34074 L IE 34074L IE 700316 A IE700316 A IE 700316A IE 31670 A IE31670 A IE 31670A IE 34074 L IE34074 L IE 34074L
Authority
IE
Ireland
Prior art keywords
acid
acids
methyl
esters
penicillin
Prior art date
Application number
IE700316A
Other versions
IE34074B1 (en
Original Assignee
Glaxo Lab Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Glaxo Lab Ltd filed Critical Glaxo Lab Ltd
Publication of IE34074L publication Critical patent/IE34074L/en
Publication of IE34074B1 publication Critical patent/IE34074B1/en

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D501/00Heterocyclic compounds containing 5-thia-1-azabicyclo [4.2.0] octane ring systems, i.e. compounds containing a ring system of the formula:, e.g. cephalosporins; Such ring systems being further condensed, e.g. 2,3-condensed with an oxygen-, nitrogen- or sulfur-containing hetero ring
    • C07D501/02Preparation
    • C07D501/08Preparation by forming the ring or condensed ring systems
    • C07D501/10Preparation by forming the ring or condensed ring systems from compounds containing the penicillin ring system
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00Medicinal preparations containing organic active ingredients
    • A61K31/33Heterocyclic compounds
    • A61K31/395Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/54Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with at least one nitrogen and one sulfur as the ring hetero atoms, e.g. sulthiame
    • A61K31/542Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with at least one nitrogen and one sulfur as the ring hetero atoms, e.g. sulthiame ortho- or peri-condensed with heterocyclic ring systems
    • A61K31/545Compounds containing 5-thia-1-azabicyclo [4.2.0] octane ring systems, i.e. compounds containing a ring system of the formula:, e.g. cephalosporins, cefaclor, or cephalexine
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/50Improvements relating to the production of bulk chemicals
    • Y02P20/55Design of synthesis routes, e.g. reducing the use of auxiliary or protecting groups

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Pharmacology & Pharmacy (AREA)
  • General Health & Medical Sciences (AREA)
  • Biotechnology (AREA)
  • Medicinal Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Epidemiology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Molecular Biology (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Cephalosporin Compounds (AREA)
  • Catalysts (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Abstract

1299734 Preparing 3-Methyl-cephalosporanic acid esters GLAXO LABORATORIES Ltd 10 March 1970 [11 March 1969] 12865/69 Heading C2A 7# -Acylamido-3-methyl-cephalosporanic acid esters are prepared by heating a 6#-acylamidopenicillanic acid 1-oxide ester in a solvent selected from ketones boiling at 75‹ to 120‹ C., esters boiling at 75‹ to 140‹ C., dioxan (the heating being for at least 2 hours at 75‹ to 110‹C. and for at least 45 minutes at higher temperatures in these solvents), and diethylene glycol dimethyl ether, in the presence of a hydrocarbyl sulphonic acid or a phosphorus acid. Suitable ketones and esters are ethyl methyl ketone, isobutyl methyl ketone, methyl n-propyl ketone, n-propyl acetate, n-butyl acetate, iso-butyl acetate, sec-butyl acetate and diethyl carbonate. Hydrocarbyl sulphonic acids may be alkyl, aryl or aralkyl sulphonic acids. Phosphorus acids may be ortho-, poly- or pyrophosphoric acids, phosphonic or phosphorus acids; the phosphonic acids may be aliphatic, araliphatic or aryl and the organic moiety may be substituted e.g. by halogen or nitro. Typical such acids are methane-, ethane-, dichloromethane-, trichloromethane-, iodomethane-, bromobenzene- and nitrobenzenephosphonic acids. The acid is preferably used in a proportion of 0À05 to 0À2 mole and not exceeding 1À0 mole per mole of the penicillin oxide. The reaction is preferably carried out under reflux using a desiccant in the reflux return tube to remove water formed during the reaction. The product is isolated by removing the solvent e.g. by evaporation, and the acid, e.g. by water-washing if the solvent is water-immiscible or else by neutralizing with e.g. CaCO 3 or MgO and filtering, optionally decolorising the charcoal and precipitating the product with water, and crystallising or purifying by chromatography. The penicillin 1-oxide ester is obtained by esterifying the 3-carboxyl group and then oxidising the 1-sulphur group with an oxidising agent in an amount such that at least 1 atom of active oxygen per atom of thiazolidine sulphur is present. Typical oxidising agents are metaperiodic acid, peracetic acid, monoperphthalic acid, m-chloroperbenzoic acid, or t-butylhypochlorite with a weak base, e.g. pyridine. The penicillin 1-oxide ester preferably has protecting groups on any radicles present which are reactive in the various processes. [GB1299734A]
IE316/70A 1969-03-11 1970-03-10 Improvements in or relating to cephalosporin compounds IE34074B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB02865/69A GB1299734A (en) 1969-03-11 1969-03-11 Improvements in or relating to cephalosporin compounds

Publications (2)

Publication Number Publication Date
IE34074L true IE34074L (en) 1970-09-11
IE34074B1 IE34074B1 (en) 1975-01-22

Family

ID=10012562

Family Applications (1)

Application Number Title Priority Date Filing Date
IE316/70A IE34074B1 (en) 1969-03-11 1970-03-10 Improvements in or relating to cephalosporin compounds

Country Status (15)

Country Link
JP (1) JPS5417751B1 (en)
AT (1) AT306920B (en)
BE (1) BE747118A (en)
BR (1) BR6915236D0 (en)
CH (1) CH537416A (en)
DE (1) DE2011375A1 (en)
ES (1) ES377329A1 (en)
FR (1) FR2037857A5 (en)
GB (1) GB1299734A (en)
HU (1) HU165811B (en)
IE (1) IE34074B1 (en)
NL (1) NL7003357A (en)
SE (1) SE386901B (en)
YU (1) YU36378B (en)
ZA (1) ZA701626B (en)

Also Published As

Publication number Publication date
GB1299734A (en) 1972-12-13
ES377329A1 (en) 1972-06-16
DE2011375A1 (en) 1970-09-24
BR6915236D0 (en) 1973-02-13
YU58070A (en) 1981-11-13
CH537416A (en) 1973-05-31
IE34074B1 (en) 1975-01-22
NL7003357A (en) 1970-09-15
ZA701626B (en) 1971-10-27
BE747118A (en) 1970-09-10
HU165811B (en) 1974-11-28
SE386901B (en) 1976-08-23
FR2037857A5 (en) 1970-12-31
JPS5417751B1 (en) 1979-07-02
AT306920B (en) 1973-04-25
YU36378B (en) 1983-06-30

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