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US5142038A Process of enantiomeric separation of carbacephem intermediates 失效
卡培膦中间体对映体分离方法

Process of enantiomeric separation of carbacephem intermediates
摘要:
Enantiomerically pure .beta.-lactam intermediates of the formula (I) ##STR1## are isolated from a haloalkane solvent through precipitation with methyl-t-butyl ether or methanol. The products thus obtained are key intermediates in the synthesis of antibiotic aagents. The process is appropriate for large scale production.
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