Base-catalysed prototropic isomerization. Part VI. The isomerization of acetylenic hydrocarbons
作者:J. Cousin、A. J. Hubert
DOI:10.1039/p19720001653
日期:——
The isomerization of substituted 1,8-diphenylocta-3,5-diynes by potassium t-butoxide–t-butyl alcohol and by potassamide on alumina (a homogeneous catalyst) has been studied. The course of the reaction depends strongly on the catalyst and on the diyne. Conjugated tetraenes are obtained with both catalysts in the case of 1,8-di-phenylocta-3,5-diyne. In contrast, 1,8-bis-(2,4,6-trimethylphenyl)octa-3
研究了叔丁醇钾-叔丁醇和钾酰胺在氧化铝(均相催化剂)上的取代1,8-二苯基辛-3,5-二炔的异构化。反应过程很大程度上取决于催化剂和二炔。在1,8-二苯基辛基-3,5-二炔的情况下,用两种催化剂都可获得共轭四烯。相反,1,8-双-((2,4,6-三甲基苯基)辛基-3,5-二炔在异相催化剂上产生共轭四烯,但三键的迁移发生在均相体系中,从而得到1,8 -双-(2,4,6-三甲基苯基)octa-1,3-diyne。