Reaction behavior of cyclopropylmethyl cations derived 1-phenylselenocyclopropylmethanols with acids
作者:Mitsunori Honda、Toshiaki Nishizawa、Yuko Nishii、Shuhei Fujinami、Masahito Segi
DOI:10.1016/j.tet.2009.08.082
日期:2009.11
ropylmethyl cations are generated by the reaction of the corresponding cyclopropylmethanols 1 with TsOH. The reaction in methanol proceeds to afford the homoallylic ethers 2, ring-enlargement products 3, 4, and ring opening products 5 depending upon the kind of substituent on the cyclopropane ring or the α-carbon. On the other hand, in the case of the absence of methanol as nucleophile, 4H-selenochromene