Lewis-Acid-Catalyzed Reactions of Bis(4-alkoxyphenyl)methanol with (Diarylmethylene)- and (Dialkylmethylene)cyclopropanes
作者:Liang-Feng Yao、Min Shi
DOI:10.1002/ejoc.200900546
日期:2009.10
Bis(4-methoxyphenyl)methanol (2a) can be transformed by BF3·OEt2-catalyzed reactions of (arylmethylene)cyclopropanes 1 to the corresponding polysubstituted cyclopentenes 3 as the major products along with methylenecyclobutanes and dienes as minor products. The reaction conditions are mild, yields are moderate to good. In the reactions of aliphatic methylenecyclopropanes with bis(4-methoxyphenyl)methanol (2a), cyclopentenes