Synthesis of<i>N</i>-(2,3,4,5,6-Pentafluorobenzyloxy)-γ-lactams by Rhodium-Catalyzed Cyclization of Diazo Amides
作者:Marcin Budny、Magdalena Nowak、Andrzej Wojtczak、Andrzej Wolan
DOI:10.1002/ejoc.201402571
日期:2014.10
Rhodium-catalyzed cyclization of N-(2,3,4,5,6-pentafluoro-benzyloxy) diazo amides leading to the corresponding γ-lactams is described. The cyclization is based on the intramolecular catalytic insertion into the C–H bond. Fourteen lactams were obtained with up to 91 % yield and 88 % ee. Gabapentin hydrochloride, a GABA analog, was also synthesized by this method, which shows that deprotection of the
描述了 N-(2,3,4,5,6-五氟-苄氧基) 重氮酰胺的铑催化环化,产生相应的 γ-内酰胺。环化基于分子内催化插入 C-H 键。获得了 14 种内酰胺,产率高达 91%,ee 高达 88%。加巴喷丁盐酸盐,一种 GABA 类似物,也通过这种方法合成,这表明 2,3,4,5,6-五氟苄氧基的脱保护是可能的。