作者:Sakae Uemura、Haruo Miyoshi、Akira Tabata、Masaya Okano
DOI:10.1016/s0040-4020(01)92012-5
日期:1981.1
The reaction of conjugated dienes such as 1,3-butadiene, isoprene, 2,3-dimethyl-1,3-butadiene, 2,5-dimethyl-2,4-hexadiene, 1,3-cyclopentadiene, and 1,3-cyclohexadiene, with thallium(III)acetate in acetic acid at 10–65° for 0.5–15 hr affords an isomeric mixture of the corresponding diacetoxyalkenes (1,2- and 1,4-addition products) in 10–92% yields. The 1,2-addition products are predominantly formed
共轭二烯如1,3-丁二烯,异戊二烯,2,3-二甲基-1,3-丁二烯,2,5-二甲基-2,4-己二烯,1,3-环戊二烯和1,3-的反应环己二烯与乙酸th(III)在乙酸中于10–65°混合0.5–15小时,可以以10–92%的收率得到相应的二乙酰氧基烯烃(1,2-和1,4-加成产物)的异构体混合物。除1,3-环戊二烯外,在所有检查的情况下,主要形成1,2-加成产物。假定反应通过乙酰氧基化和脱盐步骤进行,后面的步骤伴随和/或随后是乙酰氧基的攻击。在线性末端二烯和环状二烯的情况下,proposed部分的初始进攻被认为主要发生在C-1和C-2碳原子上。