Convenient preparation of bis-enones and bis-enoates from cycloalkenes
作者:John Montgomery、Alexey V. Savchenko、Yunbo Zhao
DOI:10.1021/jo00122a066
日期:1995.9
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 aldolcyclization 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