화학공학소재연구정보센터
Journal of the American Chemical Society, Vol.130, No.47, 15997-16002, 2008
Low-Valent Titanium-Mediated Stereoselective Alkylation of Allylic Alcohols
We have developed low-valent titanium-mediated 1,3-transpositive cross-coupling reactions of acyclic and cyclic allylic alcohols for the stereoselective introduction of ethyl, 2-silylethyl, 2-phenethyl, and alkenyl groups. Cross-coupling of an allylic alcohol with a vinylsilane or styrene derivative is particularly noteworthy, as an efficient cross-selective coupling of two alkenes has been elusive. The stereochemistry of the cross-coupling alkylation is consistent with syn addition/beta-elimination.