Further Studies on Quinone Diels-Alder Reactions with 1,3,3-Trimethyl-2-vinylcyclohexenes: Regioselective Synthesis of 12-Methyl-podocarpane Diterpenes and Isolation of a Hetero Diels-Alder Product from 1,4-Benzoquinone
作者:Thomas A. Engler、UmaShanker Sampath、David Vander Velde、Fusao Takusagawa
DOI:10.1080/00397919208021337
日期:1992.7
Diels-Alder reactions of 2-[(E)-beta-alkoxyvinyl]-1,3,3-trimethylcyclohexenes with 2-methoxy-3-methyl-1,4-benzoquinone regioselectively produce adducts possessing the 12-methyl-podocarpane ring skeleton. In addition, in the reaction with 1,4-benzoquinone an unusual hetero Diels-Alder product involving the C=O group of the quinone is found in low yield.