R¹ is amino or protected amino, R² is lower alkyl substituted with 1 to 6 halogen, R³ is hydroxy(lower)alkyl, protected hydroxy(lower)alkyl or halo(lower)alkyl and R⁴ is hydrogen, or R³ and R⁴ are linked together to form lower alkylene, and R⁵ is hydrogen or an amino protective group, and a pharmaceutically acceptable salt thereof, processes for their preparation and pharmaceutical compositions comprising them. The invention also relates to intermediate products of the formula
摘要:
2-Oxyimino-3-oxobutyric acid derivatives of formula wherein
X 2 is halogen or hydrogen. R 2 is carboxy(lower)alkyl or protected carboxy(lower)-alkyl. and R 8 is car box y or protected carboxy, and the and processes for preparation thereor.
wherein R' is amino or a protected amino group, R 2 is carboxy or a protected carboxy group, and X is halogen, and pharmaceutically acceptable salts thereof, processes for their preparation and pharmaceutical compositions containing them in association with the pharmaceutically acceptable, substantially non-toxic carrier or excipient.
摘要:
7-Acylamino-3-vinylcephalosporanic acid derivatives of the formula: in which R' is aminothiazolyl, aminothiadiazolyl, aminooxadiazolyl, aminopyridyl, aminopyrimidinyl, aminotetrazolyl. protected aminothiazolyl, protected aminothiadiazolyl, protected aminooxadiazolyl, protected aminopyridyl, protected aminotetrazolyl,.or
a group of the formula: wherein R 3 IS C 1 -C 7 alkyl, R 2 is carboxy or a protected carboxy group, and A is methylene which may have certain substituents, processes for their preparation, pharmaceutically acceptable saits thereof, and also a pharmaceutically composition comprising, as an effective ingredient, the above compound in association with pharmaceutically acceptable carriers. The invention further relates to starting and intermediate compounds, which are useful for the preparation of the title compounds.
R A is amino or a protected amino group, R b' is lower alkenyl, X is -S- or -SO-, and R 3 is carboxy or a protected carboxy group, and salts thereof and processes for their preparation.
摘要:
A compound of the formula : wherein R' is amino or a protected amino group, Z is N or CH, R 2 is an organic group, and R is a group of the formula : (in which R 3 and R 4 are each lower alkyl, or R 3 and R 4 are linked together to form C 3 -C 6 alkylene, A is lower alkylene, and R 5 is hydroxy or a protected hydroxy group) or a group of the formula : (in which R 6 is lower alkyl. R 7 and R 8 are each hydroxy or a protected hydroxy group, and Y is N or CH), and a pharmaceutically acceptable salt thereof, processes for their preparation and pharmaceutical compositions comprising them as an active ingredient. The invention relates also to intermediates of the formula and their preparation.