Reactions of cyclohexadienes. Part XII. Some dienamines and dimethyl acetylenedicarboxylate
作者:A. J. Birch、E. G. Hutchinson
DOI:10.1039/j39710003671
日期:——
Reaction of some N-(cyclohexa-1,3-dienyl)morpholine derivatives with dimethyl acetylenedicarboxylate gives rise initially to cyclobutene derivatives by reaction with the enamine double bond. Whether these adducts are stable, or convertible into the isomeric cyclo-octatrienes, depends on the presence and nature of a substituent at the 4-position of the cyclohexadiene. Attempted dehydrogenation of dimethyl
一些N-(环六-1,3-二烯基)吗啉衍生物与乙炔二羧酸二甲酯的反应最初通过与烯胺双键的反应生成环丁烯衍生物。这些加合物是稳定的还是可转化为异构的环辛烯,取决于环己二烯4-位取代基的存在和性质。尝试将6-吗啉代双环二[4,2,0]八-2,7-二烯-7,8-二羧酸二甲酯(2; R = H)脱氢令人惊讶地导致了3-吗啉代邻苯二甲酸二甲酯。