Double Diels-Alder Reaction of<i>trans</i>-3-Methylene-1,4-hexadiene and 1-Methyl-3-methylene-4-pentenyl Tosylate
作者:Shuji Kanemasa、Hirohiko Sakoh、Eiji Wada、Otohiko Tsuge
DOI:10.1246/bcsj.59.1869
日期:1986.6
A cross-conjugated triene, trans-3-methylene-1,4-hexadiene, is accessible from the Grignard reagent of chloroprene and methyloxirane via 1-methyl-3-methylene-4-pentenyl tosylate. The diene-transmissive Diels–Alder reaction of the triene and the stepwise sequence of double Diels–Alder reaction of the tosylate are investigated. Stereo- and regioselectivity of these reactions in the presence or absence of Lewis acid catalyst are discussed.
通过 1-甲基-3-亚甲基-4-戊烯对甲苯磺酸盐,可以从氯丁二烯和甲基环氧乙烷的格氏试剂中获得交叉共轭的三烯,即反式-3-亚甲基-1,4-己二烯。研究了三烯的二烯透射 Diels-Alder 反应和对甲苯磺酸盐的双 Diels-Alder 反应的逐步顺序。讨论了这些反应在路易斯酸催化剂存在或不存在的情况下的立体选择性和区域选择性。