Patent number: 5616599
Abstract: Compounds of the following formula (I) or the formula (I).sub.p : ##STR1## wherein R.sup.1 is alkyl or alkenyl; R.sup.2 and R.sup.3 are hydrogen, alkyl, alkenyl, cycloalkyl, aralkyl, aryl, or aryl fused to cycloalkyl; R.sup.4 is hydrogen, alkyl, alkanoyl, alkenoyl, arylcarbonyl, alkoxycarbonyl, tetrahydropyranyl, tetrahydrothiopyranyl, tetrahydrothienyl, tetrahydrofuryl, a group of formula --SiR.sup.a R.sup.b R.sup.c, in which R.sup.a, R.sup.b and R.sup.c are alkyl or aryl, alkoxymethyl, (alkoxyalkoxy)methyl, haloalkoxymethyl, aralkyl, aryl or alkanoyloxymethoxycarbonyl; R.sup.5 is carboxy or --CONR.sup.8 R.sup.9, wherein R.sup.8 and R.sup.9 hydrogens or alkyl, or R.sup.8 and R.sup.9 together form alkylene; R.sup.6 is hydrogen, alkyl, alkoxy or halogen; R.sup.7 is carboxy or tetrazol-5-yl; R.sub.p.sup.1 is hydrogen, alkyl, cycloalkyl or alkanoyl; R.sub.p.sup.2 is a single bond, alkylene or alkylidene; R.sub.p.sup.3 and R.sub.p.sup.4 are each hydrogen or alkyl; R.sub.p.sup.6 is carboxy or tetrazol-5-yl; and X.
Type:
Grant
Filed:
January 26, 1995
Date of Patent:
April 1, 1997
Assignee:
Sankyo Company, Limited
Inventors:
Hiroaki Yanagisawa, Koichi Fujimoto, Yoshiya Amemiya, Yasuo Shimoji, Takuro Kanazaki, Hiroyuki Koike, Toshio Sada
Patent number: 5459148
Abstract: Compounds of formula (I): ##STR1## [wherein: A represents a group (IIa), (IIb) or (IIc): ##STR2## R.sup.1 is alkyl, alkenyl, cycloalkyl or a group of formula R.sup.4 --Y--R.sup.5 --, where: R.sup.4 is hydrogen, alkyl, or cycloalkyl, R.sup.5 is a single bond or alkylene, and Y is oxygen, sulfur or imino group; R.sup.2 is hydrogen, halogen, optionally substituted alkyl, optionally substituted alkenyl, optionally substituted cycloalkyl, hydroxy, amino, alkylamino, dialkylamino, formyl, alkylcarbonyl, alkoxy, alkylthio, cyano or nitro; R.sup.3 is hydrogen, alkyl, carboxy, protected carboxy, carbamoyl or tetrazol-5-yl; X is of formula --CH.dbd., --N.dbd. or --C(COOR.sup.6).dbd., where R.sup.
Type:
Grant
Filed:
October 27, 1994
Date of Patent:
October 17, 1995
Assignee:
Sankyo Company, Limited
Inventors:
Hiroaki Yanagisawa, Yoshiya Amemiya, Takuro Kanazaki, Yasuo Shimoji, Hiroyuki Koike, Toshio Sada