摘要:
The invention provides 3-carbamoyloxymethylcephem derivatives represented by the general formula: ##STR1## wherein R.sub.1 represents hydrogen atom or trichloroacetyl group, R.sub.2 represents hydrogen atom or methoxy group, and R.sub.3 represents hydrogen atom or hydroxyl group, or pharmaceutically acceptable salt thereof. The cephem derivatives of the invention are useful as antibacterial drugs.
摘要:
Described herein is a cephem derivative represented by the general formula: ##STR1## wherein n stands for 1 or 2, Y stands for CH or nitrogen atom, R.sub.1 represents a lower hydrocarbon group or a carboxyl-substituted, a carbamoyl-substituted, or a cyclopropyl-substituted lower alkyl group, and R.sub.2 denotes hydroxyl group, a lower alkyl group, a hydroxy-substituted lower alkyl group, or carbamoyl group. The derivative is useful as an antibacterial composition. Also described herein are processes for the production of the derivative, antibacterial composition, intermediate of the derivative and process for the production thereof.
摘要:
Described herein is a cephem derivative represented by the general formula: ##STR1## wherein n stands for 1 or 2, Y stands for CH or nitrogen atom, R.sub.1 represents a lower hydrocarbon group or a carboxyl-substituted, a carbamoyl-substituted, or a cyclopropyl-substituted lower alkyl group, and R.sub.2 denotes hydroxyl group, a lower alkyl group, a hydroxy-substituted lower alkyl group, or carbamoyl group. The derivative is useful as an antibacterial agent. Also described herein are processes for the production of the derivative, antibacterial composition, intermediate of the derivative and process for the production thereof.
摘要:
A compound represented by the formula: ##STR1## wherein R.sub.1 is hydrogen or methoxy; R.sub.2 is hydrogen or hydroxy; R is ##STR2## wherein R.sub.3 and R.sub.4 are hydroxy or acyloxy, Y is oxygen, sulfur or >N-R.sub.5 wherein R.sub.5 is hydrogen or lower alkyl, and Z is sulfur or >N-R.sub.5 wherein R.sub.5 has the same meanings as defined above; and X is ##STR3## wherein R.sub.6 is acyloxy or nitrogen-containing heterocyclicthio which may have substituent(s), a pharmaceutically accpetable salt thereof, and a carboxylic ester thereof.This compound has improved antibacterial activity against Kleb. pneumoniae and Pseud. aeruginosa.
摘要:
Described herein is 3-(pyrrolidinio)methyl-3-cephem derivative represented by the general formula: ##STR1## wherein Y stands for CH or nitrogen atom, R.sub.1 and R.sub.2 are the same or different, and represent a lower alkyl group, R.sub.3 denotes a hydroxy-substituted lower alkyl group, a lower alkyl group, or a carbamoyl group, and when Y stands for CH, R.sub.3 denotes a hydroxy-substituted lower alkyl group. The derivative is useful as antibacterial composition. Also described herein are process for the production of the derivative and antibacterial composition.
摘要:
Described herein is a cephem derivative represented by the general formula: ##STR1## wherein n stands for 1 or 2, Y stands for CH or nitrogen atoms, R.sub.1 represents a lower hydrocarbon group or a carboxyl-substituted, a carbamoyl-substituted, or a cyclopropyl-substituted lower alkyl group, and R.sub.2 denotes hydroxyl group, a lower alkyl group, a hydroxy-substituted lower alkyl group, or carbamoyl group. The derivative is useful as an antibacterial agent. Also described herein are processes for the production of the derivative, antibacterial composition, intermediate of the derivative and process for the production thereof.
摘要:
Cephem derivatives represented by the formula: ##STR1## wherein R.sub.1 represents a hydrogen atom or a hydroxyl group, R.sub.2 represents a lower alkyl group or a chloro-substituted lower alkyl group, and R.sub.3 represents a lower alkanoyloxy group or a nitrogen-containing heterocyclic thio group,and the pharmaceutically acceptable salts thereof. The cephem derivatives exhibit excellent antibacterial activity and are effective against Gram-positive and Gram-negative bacteria.
摘要:
N-(Substituted chromone-3-carbonyl)phenylglycine derivatives. These derivatives are useful intermediates for cephem compounds which are excellent as antibacterial agents.
摘要:
New chromone derivatives having the formula: ##STR1## wherein A represents a hydrogen atom, a halogen atom or a hydroxyl group, and R.sub.1 represents a lower alkyl or a chloro-substituted lower alkyl group. The derivatives are useful intermediates for synthesis of cephem derivatives as antibacterial drugs.
摘要:
A cephalosporin derivative represented by the formula: ##STR1## wherein R.sub.1 represents a lower alkyl group, and A is selected from: a group of the following formula: ##STR2## where R.sub.2 and R.sub.3 are the same or different lower alkyl group, R.sub.4 represents a substituted lower alkyl or amino group;a group which may be substituted and which is represented by the following formula: ##STR3## where R.sub.5 represents a lower alkyl group; or a group of the following formula: ##STR4## where R.sub.5 is as defined above, R.sub.6 represents a hydroxyl lower alkyl or carboxyl group, or its pharmacologically acceptable salt, and a process for preparing the same, as well as an antibacterial agent containing the same.