Halogenation of 1,1-diarylethylenes by N-halosuccinimides
作者:Ge Zhang、Rui-Xue Bai、Chu-Han Li、Chen-Guo Feng、Guo-Qiang Lin
DOI:10.1016/j.tet.2018.11.018
日期:2019.3
An efficient method for the preparation of 2,2-diarylvinyl halides from the corresponding 1,1-diarylethylenes has been developed. N-Halosuccinimides (N-bromosuccinimide or N-chlorosuccinimide) were used as the halogenation reagents. The practicability of this method is highlighted by its simple operation, broad substrate scope and capability for large-scale reaction.
Reactions of 1,1-diarylethylenes with selenium compounds
作者:D. Elmaleh、S. Patai、Z. Rappoport
DOI:10.1039/j39710002637
日期:——
The synthesis of substituted benzoselenopheno[2,3-b]benzoselenophensfrom1,1-diarylethylenes was achieved in much higher yields with diselenium dichloride than with seleninyl chloride. 1,1-Bis-(2,4-dimethylphenyl)-ethylene with either selenium tetrachloride or diselenium dichloride yielded the corresponding 2,2-diarylvinyl selenide; reactions of other diarylethylenes with selenium tetrachloride or
用二氯化二硒比用硒基氯以高得多的产率由1,1-二芳基乙烯合成取代的苯并硒吩[2,3- b ]苯并硒酚。1,1-双-(2,4-二甲基苯基)-乙烯与四氯化硒或二氯化二硒产生相应的2,2-二芳基乙烯基硒化物;其他二芳基乙烯与四氯化硒或四溴化硒的反应生成无硒产物。扩大与亚硒酰氯的反应以产生二-1-苯并硒基苯并[2,3- b:2',3'- b ']苯并二硒酚。
Reaction of 1,1-diarylethylenes with tellurium halides
作者:David Elmaleh、Saul Patai、Zvi Rappoport
DOI:10.1039/j39710003100
日期:——
The reaction of 1,1-diarylethylenes with tellurium tetrachloride gives dimers as well as adducts containing two molecules of the ethylenes bound to TeCl2. The u.v., i.r., n.m.r., and mass spectra of the adducts have been measured and the influence of temperature and solvent changes on the n.m.r. spectra has been studied. Several possible structures are proposed and discussed. The chlorine atoms in
1,1-二芳基乙烯与四氯化碲的反应可生成二聚体以及包含两个与TeCl 2结合的乙烯分子的加合物。测量了加合物的uv,ir,nmr和质谱,并研究了温度和溶剂变化对nmr光谱的影响。提出并讨论了几种可能的结构。加合物(Ph 2 C CH 2)2 TeCl 2中的氯原子(IIa)可以交换为其他卤素原子。已经研究了加合物的各种反应,其中一些碲原子保留在一个σ键结合的双-(2,2-二芳基乙烯基)碲化物产品中,而另一些则丢失,从而生成衍生自1,1-的产物。仅二芳基乙烯部分。
Nucleophilic substitution by thiolate ions in some 1,1-diaryl-2-halogenoethylenes
作者:P. Beltrame、D. Pitea、M. Simonetta
DOI:10.1039/j29670001108
日期:——
Six 1,1-diaryl-2-arylthioethylenes were obtained by displacement of chloride or bromide ion from diaryl-halogeno ethylenes by aryl thiolateions in amidic solvents.