4-Substituted-2-oxoazetidine compounds and processes for the preparation
申请人:Fujisawa Pharmaceutical Co., Ltd.
公开号:US04383945A1
公开(公告)日:1983-05-17
This invention relates to novel 4-substituted-2-oxoazetidine compounds and salts thereof, which are useful intermediates in the preparation of antibiotics having the fundamental skeleton of Thienamycin, which compounds are of the formula: ##STR1## in which R.sup.1 is halogen, isocyano, hydroxy(lower)alkyl or protected hydroxy(lower)alkyl, R.sup.2 is hydrogen or lower alkyl optionally substituted by carboxy or protected carboxy, and R.sup.3 is carboxy or a protected carboxy group, or a base salt thereof.
The present invention relates to novel 4-substituted-2-oxoazetidine compounds and to processes for preparing the same. These compounds are useful intermediates for preparing antibiotics having the basic skeleton of Thienamycin.
Compounds of the formula [I] ##STR1## in which R.sup.1 is hydroxy, a protected hydroxy or lower alkoxy group, R.sup.2 is carboxy or an easily eliminable esterified carboxy group and R.sup.3 is pyridyl, and pharmaceutically acceptable salts thereof, having antimicrobial and .beta.-lactamase inhibiting properties, and pharmaceutical compositions containing the same.
Carbapenam compound and processes for the preparation thereof
申请人:FUJISAWA PHARMACEUTICAL CO., LTD.
公开号:EP0073451A2
公开(公告)日:1983-03-09
This invention relates to a new carbapenam compound and salt thereof More particularly, it relates to a new carbapenam compound and salt thereof, which are useful intermediates for prepanng carbapenam antibiotics, and to processes for the preparation thereof.
1-Azabicyclo(3.2.0)hept-2-ene-2-carboxylic acid derivatives, processes for the preparation thereof and pharmaceutical compositions containing them
申请人:FUJISAWA PHARMACEUTICAL CO., LTD.
公开号:EP0090366A1
公开(公告)日:1983-10-05
A compound of the formula:
in which R1 is hydroxy, a protected hydroxy group or lower alkoxy,
R2 is carboxy or a protected carboxy group and
R3 is aryl having suitable substituent(s), pyridyl which may have suitable substituent(s) or heterocyclic group containing 3 to 5 hetero atoms which may have suitable substituent(s), and pharmaceutically acceptable salts thereof, and also processes for their preparation and pharmaceutical compositions containing them in admixture with pharmaceutically acceptable carriers.