Diastereoselective Diels–Alder Additions of Ethene to Substituted Homochiral 2(1H)-Pyrazinones
作者:Jo Alen、Wim J. Smets、Liliana Dobrzańska、Wim M. De Borggraeve、Frans Compernolle、Georges J. Hoornaert
DOI:10.1002/ejoc.200600805
日期:2007.2
Diels–Alder reactions of ethene with 2(1H)-pyrazinones bearing a homochiral auxiliary group are presented. The cycloaddition products form with diasteromeric excesses of up to 50 %. To the best of our knowledge, these are the firstDiels–Alder reactions with ethene showing some degree of diastereoselectivity. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
介绍了乙烯与带有同手性辅助基团的 2(1H)-吡嗪酮的 Diels-Alder 反应。环加成产物形成的非对映体过量高达 50%。据我们所知,这些是第一次与乙烯的 Diels-Alder 反应,显示出一定程度的非对映选择性。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)