[2+2] cycloadditions of 2,2-bis(trifluoromethyl)ethylene-1,1-dicarbonitrile with enol ethers, 1,1-dimethylbutadiene, and allyltrimethylsilane
作者:Rolf Huisgen、Reinhard Brückner
DOI:10.1016/0040-4039(90)80123-4
日期:1990.1
Vinyl ethers and the title compound (BTF) form cyclobutanes via 1,4-dipoles which can be intercepted with ethanol or acetic acid. Cis- and trans-1-ethoxypropene react with BTF nonstereospecifically in agreement with a stepwise mechanism. 1,1-Dimethylbutadiene or allyltrimethylsilane undergo [2 + 2] cycloadditions with BTF, too.
乙烯基醚和标题化合物(BTF)通过1,4-偶极形成
环丁烷,可以被
乙醇或
乙酸拦截。顺式和反式-
1-乙氧基丙烯与BTF发生非立体反应,这与逐步机理相符。
1,1-二甲基丁二烯或烯丙基三甲基
硅烷也与BTF发生[2 + 2]环加成反应。