Antibacterial agents, and 4-thio azetidinone intermediates
申请人:Bristol-Myers Company
公开号:US04272437A1
公开(公告)日:1981-06-09
This invention relates to 2-substituted and 2,6-disubstituted penem compounds of the formula ##STR1## wherein Y is hydrogen, halo or certain organic substituents and X represents certain organic substituents. Also included in the invention are pharmaceutically acceptable salts of the above compounds and derivatives of the above compounds in which the carboxyl group at the 3-position is protected as by an easily removable ester protecting group. The compounds of the present invention are potent antibacterial agents or are of use as intermediates in the preparation of such agents.
There is described the preparation of novel 2-penem-3-carboxylic acid compounds having the formula ##STR1## and easily cleavable esters and carboxylic acid salts thereof. The compounds of formula I, particularly the dextrorotatory isomers thereof, are potent antibacterial agents or are of use as intermediates in the preparation of such agents.
Novel phosphorane intermediates for use in preparing penem antibiotics
申请人:Bristol-Myers Company
公开号:US04169833A1
公开(公告)日:1979-10-02
Disclosed are novel phosphorane intermediates of the formula ##STR1## wherein Z is phenyl or C.sub.1 -C.sub.6 alkyl. The intermediates are of use in preparing 2-penem-3-carboxylic acid compounds having potent antibacterial activity.