The penems, a new class of .beta.-lactam antibiotics: 6-acylaminopenem-3-carboxylic acids
作者:I. Ernest、J. Gosteli、C. W. Greengrass、W. Holick、H. R. Pfaendler、R. B. Woodward
DOI:10.1021/ja00494a032
日期:1978.12
Preparation of 2-exomethylene penam and penicillin-2-carboxylate systems
作者:Jack E. Baldwin、Andrew K. Forrest、Soo Ko、Lyndon N. Sheppard
DOI:10.1039/c39870000081
日期:——
The preparation of penicillin-2-carboxylatesystems and their conversion via a decarboxylative Pummerer reaction into the 2-methylene penam and 2-methyl penem systems is reported.