Asymmetric Vinylogous Direct Aldol Reaction Using Aluminum Tris[2,6-bis(4-alkylphenyl)phenoxide]
作者:Susumu Saito、Hisashi Yamamoto、Hiroshi Takikawa、Kazuaki Ishihara
DOI:10.1055/s-2004-817761
日期:——
Diastereoselective vinylogous direct aldol reaction was realized by use of chiral α,β-unsaturated esters and aldehydes in the presence of aluminum tris[2,6-bis(4-alkylphenyl)phenoxide]s. The reaction involves novel 1,7-asymmetric induction and direct coupling of an α,β-unsaturated ester with an aldehyde, through in situ deprotonation of the γ-proton of the ester component by LTMP.
在三[2,6-双(4-烷基苯基)苯氧基铝]s的存在下,通过使用手性α,β-不饱和酯和醛,实现了非对映选择性乙烯基直接醛醇反应。该反应涉及 α,β-不饱和酯与醛的新型 1,7-不对称诱导和直接偶联,通过 LTMP 对酯组分的 γ-质子进行原位去质子化。