Interaction between Exocyclics-cis-Butadiene and Homoconjugated Functions. Preparation andDiels-Alder Reactivity of Remotely Substituted 2,3-Dimethylidenebicyclo[2.2.2]octanes
作者:Marco Avenati、Olivier Pilet、Pierre-Alain Carrupt、Pierre Vogel
DOI:10.1002/hlca.19820650117
日期:1982.2.3
The preparations of 5,6-dimethylidene-2exo-bicyclo[2.2.2]octanol (8), its endo isomer 9, 5,6-dimethylidene-2-bicyclo[2.2.2]octanone (10) and 2 exo, 3 exo-epoxy-5,6dimethylidenebicyclo[2.2.2]octane (11) are described. The kinetics of their cycloaddition to tetracyanoethylene has been measured in toluene at 25° together with those of 2,3-dimethylidenebicyclo[2.2.2]octane (7) and 5,6-dimethylidenebicyclo[2
5,6-二亚甲基类2的制剂外-双环[2.2.2]辛醇(8),其内型异构体9,5,6-二亚甲基-2-二环[2.2.2]辛酮(10)和2外,描述了3 exo-环氧-5,6-二甲叉基双环[2.2.2]辛烷(11)。已在甲苯中于25°下测量了它们与四氰基乙烯环加成的动力学,以及2,3-二甲基亚双环[2.2.2]辛烷(7)和5,6-二甲基亚双环[2.2.2]辛-2-烯( 12)。远程替代对Diels-Alder的影响将2,3-二甲基亚芳基双环[2.2.2]辛烷的反应性与在2,3-二甲基亚甲基降冰片烷系列中观察到的反应性进行比较(1-6)。