Synthesis and Intramolecular Reactions of <i>trans</i>-Cyclohexyl-1,2-bisacrylate
作者:John R. Williams、Jianbin Ma、Peter Wepplo、Richard A. Paclin
DOI:10.1021/jo035281i
日期:2004.3.1
Photocycloaddition of dimethyl cyclobut-1-ene-1,2-dicarboxylate (1) with cyclohexene (7) afforded two photoadducts 8 and 9 in 44% and 28% yields, respectively. Spontaneous thermal isomerization of 8 gave (4Z,10Z)dimethyl cyclodeca-4,10-diene-1,4-dicarboxylate (10), which subsequently isomerized to produce trans-1,2-cyclohexane-bis-alpha-acrylic acid dimethyl ester 11. Hydride reduction of the bisacrylate 11 gave the trans-octahydro-1H-inden-2-ols 12a and 15 via a novel, stereoselective, intramolecular reaction. Reaction of the bisacrylate 11 with methyllithium afforded the bis-tertiary alcohol 16. In contrast, lithium dimethylcuprate reacted with the bisacrylate 11 to give the transhexahydro-1H-inden-2-one 17 in high yield via a novel, stereoselective, intramolecular reaction.