Reactions with asymmetric diarylethanes and diarylethylenes. Part XIII. Rearrangements of 1,1-dihalogeno-2,2-diarylethanes and the corresponding 1-halogenoethylenes in boiling ethylene glycol, alone or in the presence of sodium 2-hydroxyethoxide
作者:Alfy Badie Sakla、Wadie Tadros、Mounir Kamel Khaliel
DOI:10.1039/j39700000409
日期:——
1,1-Dihalogeno-2,2-di-p-tolylethane in boiling ethylene glycol (98%) gave the corresponding 1-halogenoethylene, the corresponding stilbene, the cyclic acetal 1,1-ethylenedioxy-2,2-di-p-tolylethane, 4,4′-dimethyldeoxybenzoin, di-p-tolylacetaldehyde, and 4,4′-dimethylbenzophenone. The last three compounds are also formed when a solution of the acetal in acidified ethylene glycol (98%) is boiled. The
在沸腾的乙二醇(98%)中的1,1-二卤代-2,2-二对甲苯甲酸酯(98%)得到相应的1-卤代乙烯,相应的,环缩醛1,1-乙烯二氧基-2,2-二-p -甲苯基甲酸酯,4,4'-二甲基脱氧苯偶姻,二-对甲苯基乙醛和4,4'-二甲基二苯甲酮。当缩醛在酸化的乙二醇(98%)中的溶液沸腾时,也会形成最后三种化合物。1-卤代乙烯在沸腾的乙二醇中生成了脱氧安息香和痕量的1,1-二对甲苯基乙烯。1,1-二氯-2,2-双-对溴苯基- (或2,2-双-对氯苯基)-乙烷进行部分脱氯化氢。