Samarium triflate-catalyzed dimerization of vinylarenes
作者:Meng-Yang Chang、Yu-Lin Tsai
DOI:10.24820/ark.5550190.p011.076
日期:——
We report the preparation of substituted indanes and their dimeric isomers via the samarium triflatemediated [Sm(OTf)3, 10 mol%] self-dimerization of vinylarenes in MeNO2 at 25 oC for 10 h. The diverse products were obtained in moderate to high yields. The synthesis involves a (3+2) annulation via the formation of carbon-carbon bonds. Plausible mechanisms are proposed and discussed. The investigation
Reactions of benzyl alcohols with HI in solvent-free conditions were examined. Three types of reactions (iodination, reduction, and ring formation) occurred depending on the degree of crowding around the benzyl position and the benzylic stabilization of substrates. Results also showed that the ring formation to give indanes proceeded efficiently when HI was used, and that compounds with electron-rich