Reaction of tertiary cyclopropyl silyl ethers with diethylaminosulfur trifluoride: the effects of substituents on the cleavage of the cyclopropane ring
作者:Masayuki Kirihara、Hiroko Kakuda、Makoto Tsunooka、Akihiro Shimajiri、Tomofumi Takuwa、Akihiko Hatano
DOI:10.1016/j.tetlet.2003.09.089
日期:2003.11
The reaction of tertiary cyclopropanol silyl ethers with diethylaminosulfur trifluoride usually causes ring opening to produce allylic fluorides. However, cyclopropyl silyl ethers bearing a strong electron-donating substituent at C1 or an electron-withdrawing substituent at C2 do not afford allylic fluorides but fluorocyclopropanes. It has also been proved that an electron-donating substituent at C2
叔环丙醇甲硅烷基醚与二乙基氨基三氟化硫的反应通常引起开环以产生烯丙基氟化物。然而,在C 1处带有强供电子取代基或在C 2上具有吸电子取代基的环丙基甲硅烷基醚不能提供烯丙基氟化物,而是氟代环丙烷。还已经证明,叔环丙醇甲硅烷基醚的C 2上的供电子取代基在与二乙氨基硫三氟化物的反应中促进开环。