Remarkable Phosphine-Effect on the Intramolecular Aldol Reactions of Unsaturated 1,5-Diketones: Highly Regioselective Synthesis of Cross-Conjugated Dienones
作者:Reema K. Thalji、William R. Roush
DOI:10.1021/ja054085l
日期:2005.12.1
We report a phosphine-mediated intramolecular aldol cyclization of unsaturated diketones that proceeds with extremely high levels of regioselectivity for the cross-conjugated bicyclic dienone products. The sense of regioselectivity observed in this reaction is complementary to that obtained using traditional aldol conditions. Experimental evidence that supports the involvement of a phosphine Michael
我们报告了膦介导的不饱和二酮的分子内羟醛环化,其对交叉共轭双环二烯酮产物具有极高的区域选择性。在该反应中观察到的区域选择性与使用传统羟醛条件获得的区域选择性互补。描述了支持参与膦迈克尔加合物的实验证据。