Novel 7-azido-3-cephem compounds are prepared via .alpha.-amino-phosphonoacetate esters. The cephem compounds are intermediates for the preparation of novel and known useful antibiotic cephalosporins.
Total synthesis of β-lactam antibiotics V. (±)-3′-Methyl-cephalothin
作者:N.G. Steinberg、R.W. Ratcliffe、B.G. Christensen
DOI:10.1016/s0040-4039(01)91968-9
日期:1974.1
Total synthesis of .beta.-lactam antibiotics. VI. 3-Arylephalosporins
作者:Raymond A. Firestone、Natalie S. Maciejewicz、B. G. Christensen
DOI:10.1021/jo00937a017
日期:1974.11
Total synthesis of (.+-.)-1-carbacefoxitin and -cefamandole and (.+-.)-1-oxacefamandole
作者:Raymond A. Firestone、John L. Fahey、Natalie S. Maciejewicz、Gool S. Patel、B. G. Christensen
DOI:10.1021/jm00214a018
日期:1977.4
The total syntheses of the (+/-)-1-carba analogues of cefoxitin (11), 7 alpha-methoxydeacetylcephalothin (5) and cefamandole (31) and the (+/-)-1-oxa analogue of cefamandole (43) are described. Their bioactivity spectra against 14 typical organisms are similar to those of their natural 1-thia counterparts, with the 1-carba compounds somewhat less active and the 1-oxa compound more active than the natural ones.