Synthesis of 3α-alkoxy-4β-substituted-2-azetidinones from L(+)-tartaric acid.
作者:Derek H.R. Barton、Jeanine Cléophax、Alice Gateau-Olesker、Stephan D. Géro、Catherine Tachdjian
DOI:10.1016/s0040-4020(01)81921-9
日期:1993.1
Tartaric acid, regioselective saponification, Pig Liver Esterase, 3-methoxy-2-azetidinone, N-Hydroxy-2-thiopyridone, radical decarboxylation. The synthesis of 3α-alkoxy-4β-azetidinones from L(+) tartaric acid is described. Regioselective saponification and methylation along with a stereo selective radical decarboxylative alkylation are key steps leading to optically pure trans-β-lactams.
酒石酸,区域选择性皂化,猪肝酯酶,3-甲氧基-2-氮杂环丁酮,N-羟基-2-硫代吡啶酮,自由基脱羧。描述了由L(+)酒石酸合成3α-烷氧基-4β-氮杂环丁烷酮。区域选择性皂化和甲基化以及立体选择性自由基脱羧烷基化是导致光学纯的反式-β-内酰胺的关键步骤。