发明授权
US4556514A 4-Carboxy azetidinone compounds and production thereof from diketene and
a Schiff base
失效
4-羧基氮杂环丁酮化合物及其由双烯酮和席夫碱生产
- 专利标题： 4-Carboxy azetidinone compounds and production thereof from diketene and a Schiff base
- 专利标题（中）： 4-羧基氮杂环丁酮化合物及其由双烯酮和席夫碱生产
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申请号： US541648申请日： 1983-10-13
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公开(公告)号： US4556514A公开(公告)日： 1985-12-03
- 发明人: Makoto Sunagawa , Koshiro Goda , Masao Enomoto , Akira Sasaki
- 申请人： Makoto Sunagawa , Koshiro Goda , Masao Enomoto , Akira Sasaki
- 申请人地址： JPX Osaka
- 专利权人： Sumitomo Chemical Company, Limited
- 当前专利权人： Sumitomo Chemical Company, Limited
- 当前专利权人地址： JPX Osaka
- 优先权： JPX57-180268 19821013; JPX57-194894 19821106; JPX58-139068 19830728
- 主分类号： C07D205/08
- IPC分类号： C07D205/08
摘要：
.beta.-Lactam compounds which are useful as intermediates for the production of carbapenem or penem derivatives and a process for producing the same. The process comprises reacting a Schiff base with diketene in the presence of an imidazole, reducing the acetyl group of the resulting N-protected-3-acetyl-2-azetidinone-4-carboxylic acid ester, and removing the protecting group for a carboxyl group from the resulting 3-(1-hydroxyethyl)-2-azetidinone-4-carboxylic acid derivative.
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