Treatment of acetal-tethered (allenylmethyl)silanes, which were obtained from the corresponding 3-bromo-5-silyl-1,3-pentadienes by a Pd-catalyzed reaction with an acetal-tethered malonate, with TiCl4 gave not only vinylcyclohexene derivatives via a standard S(E)2' pathway but also unusual allenylcyclopentane species via cyclization at the delta-position. Deuterium-labeling experiments revealed participation of a 1,2-hydride shift in a carbocation intermediate for the formation of the latter products.
OZOE, YOSHIHISA;ETO, MORIFUSA, AGR. AND BIOL. CHEM., 1982, 46, N 2, 411-418
作者:OZOE, YOSHIHISA、ETO, MORIFUSA
DOI:——
日期:——
Verfahren zur Herstellung von Alkoxymethylenverbindungen von Essigestern und substituierten Essigestern