Phosphides and arsenides as metal–halogen exchange reagents. Part 1. Dehalogenation of aliphatic dihalides
作者:Donal G. Gillespie、Brian J. Walker
DOI:10.1039/p19830001689
日期:——
yields of phosphorus-containing by-products. Similar reactions with 2,3-dichlorobuta-1,3-diene and 2-chlorobuta-1,3-diene give SN2′ rather than direct substitution products. Evidence is presented that adamantene is an initial product in the reaction of lithium diphenylphosphide with 1,2-di-iodo- and 1,2-dibromo-adamantane, but not with 1,2-dichloroadamantane, although 1- and 2-adamantyldiphenylphosphine
已经研究了二苯基磷化锂和砷化物作为金属-卤素交换的试剂。涉及两个摩尔当量的阴离子与1,2-二溴乙烯的反应导致乙炔的收率中等至良好,而含磷副产物的收率较低。与2,3-二氯丁-1,3-二烯和2-氯丁-1,3-二烯的类似反应得到S N2',而不是直接替代产品。有证据表明,金刚烷是二苯基磷化锂与1,2-二碘-金刚烷和1,2-二溴金刚烷的反应的初始产物,但与1,2-二氯金刚烷的反应不是,尽管1-和2-金刚烷基二苯基膦的氧化物在每种情况下都形成。最后,简要研究了磷阴离子与双二卤化物的反应。1,1-二溴-2,2-二苯基乙烯得到二苯基乙炔作为主要产物。