stoichiometric or catalytic amount of a Lewis acidic indium(III) salt, allylsilanes reacted intramolecularly with unactivated terminal alkynes to give cyclized products in good to high yields. The fact that the reaction proceeded in a trans-addition mode suggests a reaction mechanism via electrophilic activation of the triple bond by the indium salt.
Trost, Barry M.; Lautens; Chan, Journal of the American Chemical Society, 1991, vol. 113, # 2, p. 636 - 644
作者:Trost, Barry M.、Lautens、Chan、Jebaratnam、Mueller
DOI:——
日期:——
Indium(III) Chloride-Promoted Intramolecular Addition of Allylstannanes to Alkynes
作者:Katsukiyo Miura、Naoki Fujisawa、Akira Hosomi
DOI:10.1021/jo035780j
日期:2004.4.1
In the presence of an equimolar amount of InCl3, 8-tributylstannyl-6-octen-1-ynes (allylstannanes bearing an alkynyl group) were efficiently cyclized to 2-allyl-1-methylenecyclopentanes. In contrast, catalytic use of InCl3 gave 2-allyl-1-(tributylstannylmethylene)cyclopentanes mainly by intramolecular allylstannylation. These cyclizations could proceed via intramolecular addition of an allylindium intermediate.
TROST, BARRY M.;LAUTENS, M.;CHAN, C.;JEBARATNAM, D. J.;MUELLER, T., J. AMER. CHEM. SOC., 113,(1991) N, C. 636-644
作者:TROST, BARRY M.、LAUTENS, M.、CHAN, C.、JEBARATNAM, D. J.、MUELLER, T.