摘要:
Antimicrobial quinolonyl lactam compounds comprising a lactam-containing moiety linked, by a non-ester linking moiety, to the 3-carboxy group of a quinolone moiety. These compounds are of the formula: wherein (1) R 3 , R 4 , and R 5 , together with bonds "a" and "b", form any of a variety of lactam-containing moieties similar to those known in the art to have antimicrobial activity; (2) A, R 6 , R 7 , and R 8 form any of a variety of quinolone or naphthyridine structures similar to those known in the art to have antimicrobial activity; and (3) Y, together with R 5 , form a variety of non-ester linking moieties between the lactam-containing moiety and the quinolone moiety.
摘要:
The invention relates to a process for the preparation of β-lactam derivatives having a substituted hydroxymethyl group at the carbon atom a to the lactam carbonyl group, to the novel antibacterially-active derivatives so-obtainable and to pharmaceutical compositions containing these. The process comprises reacting under specified conditions an α-halo-β-lactam starting material with activated zinc in the presence of an appropriate aldehyde or ketone and hydrolysing the resulting zinc complex. The novel β-lactam derivatives are of the general formula I (with the meaning of R, R 1 -R 4 , Y and Z as given in the specification) and include the pharmaceutically acceptable salts thereof.
摘要:
Antimicrobial quinolonyl lactam compounds comprising a lactam-containing moiety linked, by a non-ester linking moiety, to the 3-carboxy group of a quinolone moiety. These compounds are of the formula: wherein
(1) R 3 , R 4 , and R 5 , together with bonds "a" and "b", form any of a variety of lactam-containing moieties similar to those known in the art to have antimicrobial activity; (2) A, R 6 , R 7 , and R 8 form any of a variety of quinolone or naphthyridine structures similar to those known in the art to have antimicrobial activity; and (3) Y, together with R 5 , form a variety of non-ester linking moieties between the lactam-containing moiety and the quinolone moiety.
摘要:
The present invention relates to a composition comprising ≥85 wt% of an N-deacylated cephalosporin, a process for making the same and the use of said N-deacylated cephalosporin in the preparation of highly pure semi synthetic cephalosporins.
摘要:
Provided is a process for preparing 3-nucleophile substituted-2-azetidinones by subjecting a N-OR-β-lactam to a nucleophile wherein the 3-substitution is diastereoselective.
摘要:
The present invention provides a process for making a compound having a structure according to formula (I) wherein A?1, A2 and A3¿ are independently carbon or nitrogen and R?1, R3, R4 and R6¿ are known quinolone substituents; and wherein one of R?1, R3 or R6¿ may be a lactam-containing moiety; or a protected form, salt, pharmaceutically-acceptable salt, biohydrolyzable ester, or solvate thereof; the process comprising reacting one or more organosilicon compounds with a compound having a structure according to formula (II), wherein A?1, A2 and A3, R1, R3, R4 and R6¿ as described above; wherein one of R?1, R3 or R6¿ may be a lactam-containing moiety; and X is a leaving group; or a protected form, salt, biohydrolyzable ester, or solvate thereof. The compounds prepared according to the processes of the invention are themselves useful as antimicrobials, or they may be used as intermediates for making other quinolone-containing antimicrobials.
摘要:
Provided is a process for preparing 3-nucleophile substituted-2-azetidinones by subjecting a N-OR-β-lactam to a nucleophile wherein the 3-substitution is diastereoselective.