Synthesis of novel cephem-4-ketones. A new series of human leukocyte elastase inhibitors
作者:Marco Alpegiani、Pierluigi Bissolino、Ettore Perrone、Giuseppe Cassinelli、Giovanni Franceschi
DOI:10.1016/0040-4039(91)80790-d
日期:1991.10
Alkylation of cephem-4-carbonyl chlorides at the sulphide or sulphone oxidation level with Grignard reagents, stannanes and cuprates is described. Radical or ionic bromination of the 3-methylcephem-4-ketone 8, followed by displacement with heterocyclic thiols, provides an entry to 3'-and 2-thiosubstituted derivatives, which are new potent inhibitors of HLE.