The anionic telomerizations of isoprene with secondary amines in the presence of alkali-metal catalysts were investigated under several conditions. The n=2 telomers were found to contain N,N-dialkyl(3,7-dimethyl-2,6-octadienyl)amine (2A) and N,N-dialkyl(2-isopropenyl-5-methyl-4-hexenyl)amine (2B) as the main components, n=1 and n=3 telomers were also identified. On the basis of these results, the mechanism of this anionic telomerization and the reactivity of the carbanions connected with this reaction were discussed.
在碱
金属催化剂存在下,在多种条件下研究了
异戊二烯与仲胺的阴离子调聚反应。发现n=2调聚物含有N,N-二烷基(3,7-二甲基-
2,6-辛二烯基)胺(2A)和N,N-二烷基(2-异
丙烯基-5-甲基-4-己烯基)以胺(2B)为主要成分,还鉴定出n=1和n=3调聚物。在这些结果的基础上,讨论了这种阴离子调聚反应的机理以及与该反应相关的碳负离子的反应性。