GB1379465A - Cephem-4-carboxylic acids their 1-sulphoxides and methods of prepa ring them - Google Patents
Cephem-4-carboxylic acids their 1-sulphoxides and methods of prepa ring themInfo
- Publication number
- GB1379465A GB1379465A GB3214172A GB3214172A GB1379465A GB 1379465 A GB1379465 A GB 1379465A GB 3214172 A GB3214172 A GB 3214172A GB 3214172 A GB3214172 A GB 3214172A GB 1379465 A GB1379465 A GB 1379465A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cephem
- amino
- compound
- thio
- prepared
- 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
- C07D501/00—Heterocyclic 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
- C07D501/14—Compounds having a nitrogen atom directly attached in position 7
- C07D501/16—Compounds having a nitrogen atom directly attached in position 7 with a double bond between positions 2 and 3
- C07D501/20—7-Acylaminocephalosporanic or substituted 7-acylaminocephalosporanic acids in which the acyl radicals are derived from carboxylic acids
- C07D501/57—7-Acylaminocephalosporanic or substituted 7-acylaminocephalosporanic acids in which the acyl radicals are derived from carboxylic acids with a further substituent in position 7, e.g. cephamycines
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D501/00—Heterocyclic 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
- C07D501/14—Compounds having a nitrogen atom directly attached in position 7
- C07D501/60—Compounds having a nitrogen atom directly attached in position 7 with a double bond between positions 3 and 4
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/55—Design of synthesis routes, e.g. reducing the use of auxiliary or protecting groups
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Cephalosporin Compounds (AREA)
Abstract
1379465 2 - Cephem - 4 - carboxylic acids MERCK & CO Inc 10 July 1972 [14 July 1971 10 Sept 1971 22 Nov 1971 14 April 1972] 32141/72 Heading C2C 2-Cephem-4-carboxylic acids of Formula I in which R is acyl, R<SP>1</SP> is hydrogen or methoxy, X is halogen, azido C 1-6 alkanoyloxy, aroyloxy, mono- or polyhydroxy-phenyl, 1-alkoxy-carbonyl-2-oxoalkyl, 1-(C 1-6 alkoxycarbonyl), 2- oxo - C 1-6 alkyl or 2,4 - dioxoalkyl and R<SP>2</SP> is a protecting group, are prepared by treating a compound II in which R<SP>3</SP> is hydrogen, amino or C 1-5 alkyl with either a hydrohalic acid or a compound containing an active hydrogen of formula HX, in the presence of a non-nucleophilic or Lewis acid as catalyst. Novel compounds V in which R is acyl, R<SP>2</SP> is hydrogen, or a protecting group and X<SP>2</SP> is hydrogen, halo, cyano, C 1-6 alkoxy, hydroxy, protected hydroxy, carbamoyloxy, C 1-6 alkanoyloxy, aroyloxy, mono- or polyhydroxyphenyl, 1-alkoxy-carbonyl-2- oxoalkyl heterocyclic-thio, heterocyclic-thiocarbonyl-thio or a tertiary amine are further reacted with an oxidizing agent to form the corresponding novel 1-sulphoxide. Compounds III in which R is acyl, R 2 is a protecting group, X<SP>1</SP> is C 1-6 alkoxy, cyano, hydroxy, C 1-6 alkanoyloxy, aroyloxy, carbamoyloxy, heterocyclic - thio, heterocyclic - thiocarbonyl - thio, or tertiary amine, m is 0 or 1 and the dotted line signifies a double bond in either the 2 or 3 position, comprises treating a compound of Formula III in which X<SP>1</SP> is halogen with a reagent M(X<SP>1</SP>) z where M is hydrogen or a cation from an alkali metal alkaline earth metal or Group IB metal and z is an integer equal to the valence of M; if the starting material is a #<SP>2</SP> cephem compound the product will be a mixture of both #<SP>2</SP> and #<SP>3</SP> isomers in which the #<SP>2</SP> predominates. X<SP>1</SP> is preferably carbamoyloxy and the reaction is carried out using sodium, potassium or calcium carbamate. Compounds VI in which R<SP>2</SP> is a protecting group and R and X<SP>2</SP> are as defined above are prepared by isomerization of the corresponding #<SP>2</SP> isomer by treatment with an alcohol, organic base or an adsorbent; treatment of compound VI with a reducing agent gives compound VII Compounds II are also prepared by isomerization of the corresponding pure #<SP>3</SP>-cephem compound using a base or with an adsorbent; the reaction goes to an equilibrium in which the #<SP>2</SP> isomer predominates. In the compounds prepared R is an acyl function (R 1 CO) in which R 1 is benzyl, α-amino-benzyl, 2-furylmethyl, 2- thienylmethyl, 4-amino 4-carboxy butyl (in which the amino and carboxy groups may be protected) or p-hydroxybenzyl, R<SP>2</SP> is trichloroethyl, t-butyl, benzoylmethyl, p-methoxybenzoyl, benzyl, benzhydryl or methoxymethyl and the amino protecting groups are trichloroethoxycarbonyl or t-butoxycarbonyl. Heterocyclicthio is 5 - methyl - 1,3,4 - thiadiazolyl - 2 - thio, heterocyclic - thiocarbonyl - thio is piperdinothiocarbonyl-thio and tertiary amine is pyridine. Starting materials are prepared from the sodium salt of 7-#-(D-5-amino-5-carboxy-valeramido) - 3 - carbamoyloxymethyl - 7α - methoxy- 3-cephem-4-carboxylic acid (prepared by fermentation procedure) which is treated successively with trichloroethoxycarbonyl chloride to protect the amino group and diphenyldiazomethane to protect the carboxy groups; reaction of this compound with 2-thienylacetylchloride produces the dibenzhydrylester of 7-#-[(D-5-trichloroethoxycarbonylamino - 5 - carboxyvaleryl) - (2- thienylacetyl)amino]- 3 - carbamoyloxymethyl- 7 - α - methoxy - 3 - cephem - 4 - carboxylic acid which is treated with zinc dust and acetic acid to form the benzhydryl ester of 3-carbamoyloxymethyl - 7 - α - methoxy - 7 - # - (2 - thienylacetamido) - 3 - cephem - 4 - carboxylic acid from which the #<SP>2</SP> isomer is obtained by isomerization. Trichloroethyl ester of 7-methoxy-3-carbamoyl oxymethyl - 7 - (2 - thienylacetamido) - 3 - cephem- 4-carboxylic acid is treated with zinc dust and acetic acid to form the free carboxylic acid.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US162703A US3859282A (en) | 1971-07-14 | 1971-07-14 | Process for preparing 3-substituted methyl-7-acylamido-7-methoxy-2-cephem-4-carboxylic acid and its esters |
US17955971A | 1971-09-10 | 1971-09-10 | |
US20121071A | 1971-11-22 | 1971-11-22 | |
US24427072A | 1972-04-14 | 1972-04-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1379465A true GB1379465A (en) | 1975-01-02 |
Family
ID=27496523
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3214172A Expired GB1379465A (en) | 1971-07-14 | 1972-07-10 | Cephem-4-carboxylic acids their 1-sulphoxides and methods of prepa ring them |
Country Status (9)
Country | Link |
---|---|
AU (1) | AU464944B2 (en) |
BE (1) | BE785917A (en) |
CA (1) | CA1014949A (en) |
CH (1) | CH583739A5 (en) |
DD (2) | DD108542A5 (en) |
DE (1) | DE2234479C3 (en) |
FR (2) | FR2154425B1 (en) |
GB (1) | GB1379465A (en) |
NL (1) | NL7208855A (en) |
-
0
- BE BE785917D patent/BE785917A/en unknown
-
1972
- 1972-06-27 NL NL7208855A patent/NL7208855A/xx not_active Application Discontinuation
- 1972-06-27 CA CA145,854A patent/CA1014949A/en not_active Expired
- 1972-07-04 AU AU44207/72A patent/AU464944B2/en not_active Expired
- 1972-07-10 GB GB3214172A patent/GB1379465A/en not_active Expired
- 1972-07-12 FR FR7225251A patent/FR2154425B1/fr not_active Expired
- 1972-07-12 DD DD174534*A patent/DD108542A5/xx unknown
- 1972-07-12 DD DD164376A patent/DD105452A5/xx unknown
- 1972-07-13 DE DE2234479A patent/DE2234479C3/en not_active Expired
- 1972-07-13 CH CH1054472A patent/CH583739A5/xx not_active IP Right Cessation
- 1972-12-08 FR FR7243745A patent/FR2162237B1/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE2234479B2 (en) | 1975-05-22 |
BE785917A (en) | 1973-01-08 |
FR2162237A1 (en) | 1973-07-13 |
CH583739A5 (en) | 1977-01-14 |
NL7208855A (en) | 1973-01-16 |
FR2154425A1 (en) | 1973-05-11 |
CA1014949A (en) | 1977-08-02 |
DE2234479C3 (en) | 1976-01-02 |
FR2154425B1 (en) | 1973-12-07 |
AU4420772A (en) | 1974-01-10 |
DD108542A5 (en) | 1974-09-20 |
DD105452A5 (en) | 1974-04-20 |
FR2162237B1 (en) | 1974-03-15 |
DE2234479A1 (en) | 1973-02-15 |
AU464944B2 (en) | 1975-09-11 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
48S | Specification amended (sect. 8/1949) | ||
SPA | Amended specification published | ||
PCNP | Patent ceased through non-payment of renewal fee |