Semisynthetic cephalosporins. Synthesis and structure-activity relationships of 7-(1-pyrryl)- and 7-(1-indolyl)acetamidocephalosporin derivatives

Semisynthetic cephalosporins. Synthesis and structure-activity relationships of 7-(1-pyrryl)- and 7-(1-indolyl)acetamidocephalosporin derivatives Semisynthetic cephalosporins. Synthesis and structure-activity relations of 7-sulfonylacetamido-3-cephem-4-carboxylic acids Orally absorbable cephalosporin antibiotics. 1. Structure-activity relationships of benzothienyl- and naphthylglycine derivatives of 7-aminodeacetoxycephalosporanic acid Design, synthesis and biological activities of some 7-aminocephalosporanic acid derivatives Oral absorption of cephalosproin antibiotics 2. Expanded structure-activity relationships of 7-arylacetamido-3-substituted cephalosporins Semisynthetic cephalosporins. Synthesis and structure-activity relations of analogs with 7-acyl groups derived from 2-(cyanomethylthio)acetic acid or 2-[(2,2,2-trifluoroethyl)thio]acetic acid and their sulfoxides and sulfones Structure-activity relations in cephalosporins prepared from penicillins. 1. 7.beta.-Acylamino derivatives of 3-benzyl- and 3-(3-pyridylmethyl)ceph-3-em-4-carboxylic acids Synthesis and structure-activity relationship of new cephalosporins with amino heterocycles at C-7. Dependence of the antibacterial spectrum and .beta.-lactamase stability on the pKa of the C-7 heterocycle Orally absorbable cephalosporin antibiotics. 2. Structure-activity studies of bicyclic glycine derivatives of 7-aminodeacetoxycephalosporanic acid Synthesis of .DELTA.3-1-methylene-1-carbacephems