作者:Jan Spengler、Ana I. Fernández-Llamazares、Javier Ruiz-Rodríguez、Klaus Burger、Fernando Albericio
DOI:10.1021/jo101001s
日期:2010.8.20
An efficient strategy to synthesize tartaric acid building blocks for totally regioselective transformations or derivatizations was disclosed. Starting from L-tartaric acid or L-dimethyl tartrate, respectively, we obtained type I and II building blocks with orthogonal sets of protecing groups (4-8 steps, 38-56% overall yield).
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, radicaldecarboxylation. 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.