Application of the N-Dibenzyl Protective Group in the Preparation of β-Lactam Pseudopeptides
作者:Rok Frlan、Martina Hrast、Stanislav Gobec
DOI:10.3390/molecules24071261
日期:——
Despite the great importance of β-lactam antibiotics, there is still a limited number of synthetic approaches for the formation of β-lactam–containing dipeptides. In this study, we report upon the stereoselective preparation of β-lactam–containing pseudopeptides, where different reaction conditions and NH2 protective groups were tested to obtain compounds that contain 3-amino-azetidin-2-one. We demonstrate
Synthesis of optically active .beta.-lactams by the photolytic reaction of imines with optically active chromium carbene complexes. 2. Synthesis of 1-carbacephalothin and 3-ANA relays
作者:Y. Narukawa、K. N. Juneau、D. Snustad、D. B. Miller、L. S. Hegedus
DOI:10.1021/jo00046a030
日期:1992.9
A relay (3) to optically active 1-carbacephalothin (4) was prepared in modest yield with high stereoselectivity by the photochemical reaction of optically active chromium carbene complex 1 with functionalized imine 2. In contrast, the photochemical reaction of carbene complex 1 with imine precursors 15a,b to the nocardicins was much less stereoselective.
NAKAGUCHI, OSAMU;OKU, TERUO;TAKENO, HIDEKAZU;HASHIMOTO, MASASHI;KAMIYA, T+, CHEM. AND PHARM. BULL., 35,(1987) N 10, 3985-3994