A sulfinyl trialkoxycarbonyl ethene as a new enantiopure dienophile in asymmetric diels-alder reactions
作者:Juan C. Carretero、José L. García Ruano、Luisa M. Martín Cabrejas
DOI:10.1016/0040-4020(95)00443-c
日期:1995.7
The synthesis and the asymmetric Diels-Alder reactions of the enantiomericallypure (S)-p-tolylsulfinyl trialkoxycarbonyl ethene 3 with cyclic and acyclic dienes are reported. π-Facial selectivity and regioselectivity are very high in all studied cases. Reactions with cyclopentadiene exhibit moderated or high exo-selectivity, which disappears with acyclic dienes. The use of high pressure improves the