Maksikova, A. V.; Serebryakova, E. S.; Shcherbakov, V. V., Journal of Organic Chemistry USSR (English Translation), 1989, vol. 25, # 7.2, p. 1371 - 1375
Novel 6-methoxy and 6-thioalkyl-6-acylamido-penicillanic acids and their non-toxic pharmaceutically-acceptable salts, esters and amides which are useful as antibiotics. The products are prepared by treating an ester of 6-substituted-6-aminopenicillanic acid with an acylating agent followed by removal of the ester group. Also disclosed are novel intermediates.
Novel 6-methoxy and 6-thioalkyl-6-acylamidopenicillanic acids and their non-toxic pharmaceutically-acceptable salts, esters and amides which are useful as antibiotics. The products are prepared by treating an ester of 6-substituted-6-aminopenicillanic acid with an acylating agent followed by removal of the ester group. Also disclosed are novel intermediates.
[EN] METHOD FOR PREPARATION OF CERTAIN 1,5 DISUBSTITUTED TETRAZOLES<br/>[FR] PROCÉDÉ DE PRÉPARATION DE CERTAINS TÉTRAZOLES 1,5 DISUBSTITUÉS
申请人:LONZA AG
公开号:WO2016142364A1
公开(公告)日:2016-09-15
The invention discloses a method for the preparation of certain 1,5 disubstituted tetrazole and similar compounds starting from certain thioacetamides, which ultimately allows the preparation of these certain 1,5 disubstituted tetrazoles from readily available compounds such as acetophenone and similar compounds.
A catalyst for the polymerization of an alkylene oxide compound is composed of a phosphazene compound or a phosphazenium salt which is derived from the phosphazene compound and an active hydrogen compound. A poly(alkylene oxide) can be efficiently produced by polymerizing the alkylene oxide compound in the presence of the catalyst and, when the catalyst is composed of the phosphazene compound, the active hydrogen compound. The poly(alkylene oxide) contains no residual metal components and compared with those produced using conventional amine-base catalysts, has also significantly improved odor.
PROCESS FOR PRODUCING 2' -(1H-TETRAZOL-5-YL)-BIPHENYL-4-CARBALDEHYDE
申请人:Sumitomo Chemical Company, Limited
公开号:EP1666471A1
公开(公告)日:2006-06-07
The present invention provides a process for producing 2'-(1H-tetrazol-5-yl)biphenyl-4-carbaldehyde which comprises reacting 2'-cyanobiphenyl-4-carbaldehyde with a salt of azide; a process for producing a highly pure crystal of 2'-(1H-tetrazol-5-yl)biphenyl-4-carbaldehyde which comprises reacting 2'-cyanobiphenyl-4-carbaldehyde with a salt of azide, obtaining a crystal of 2'-(1H-tetrazol-5-yl)biphenyl-4-carbaldehyde, dissolving said crystal obtained and recrystallizing a highly pure crystal in tetrahydrofuran; and the like.
According to the present process, 2'-(1H-tetrazol-5-yl)biphenyl-4-carbaldehyde which is useful as a synthetic intermediate of medicines can be produced in a short process at high yield and high purity.