Organocatalytic Highly Enantioselective Conjugate Addition of Aldehydes to Alkylidine Malonates
作者:Gui-Ling Zhao、Jan Vesely、Junliang Sun、Kirsten E. Christensen、Charlotte Bonneau、Armando Córdova
DOI:10.1002/adsc.200700570
日期:2008.3.25
The first highly enantioselective, direct organocatalytic conjugate addition of unmodified aldehydes to alkylidinemalonates is presented. The reaction gives access to β-formyl-substituted malonates and highly functionalized lactones with up to 14:1 dr and generally 94 to >99% ee.
提出了将未修饰的醛首次高对映选择性,直接有机催化共轭加成至丙二酸丙二酸酯。该反应可得到β-甲酰基取代的丙二酸酯和高度官能化的内酯,其dr高达14:1 ,ee通常为94%至> 99%。