Carbon Nucleophiles in the Mitsunobu Reaction. Mono- and Dialkylation of Bis(2,2,2-trifluoroethyl) Malonates
作者:James M. Takacs、Zhenrong Xu、Xun-tian Jiang、Alexei P. Leonov、Gregory C. Theriot
DOI:10.1021/ol0266626
日期:2002.10.1
graphicSimple dialkyl malonate esters, for example diethyl malonate, exhibit relatively limited scope as carbon nucleophiles in the Mitsunobu dehydrative alkylation reaction. In contrast, bis(2,2,2-trifluoroethyl) malonate readily undergoes dehydrative alkylation with primary alcohols, and using only a slight excess of malonate gives monoalkylated product in good yield. Some secondary alcohols can also be employed, and bis(2,2,2-trifluoroethyl) malonates can be used in a second dehydrative alkylation to give dialkylated products in good to excellent yield.