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
通过相应的环丙基甲醇1与TsOH的反应生成1-苯基硒代环丙基甲基阳离子。在甲醇中进行反应,得到高烯丙基醚2,环增大产品3,4,和开环产品5取决于环丙烷环或α碳原子上取代基的种类。另一方面,在不存在甲醇作为亲核试剂的情况下,仅获得4 H-硒代色烯衍生物7。所得苯硒基均烯丙基化合物2中苯硒基的氧化消除 提供官能化的丙二烯衍生物和炔烃衍生物。