Reactions of organoboranes with carbanions bearing three potential leaving groups: unusual processes, products and mechanisms
作者:Basil A. Saleh、Keith Smith、Mark C. Elliott、D. Heulyn Jones、Benson M. Kariuki、Gamal A. El Hiti
DOI:10.1016/j.tet.2016.09.005
日期:2016.11
α-chloroalkyl phenyl sulfoxides or reacted with aldehydes to aldol-like products. With X=SO2Ph, the major product was the corresponding α,α-dichloroalkyl phenyl sulfone, apparently formed through a redox reaction. With X=S(O)(NMe)Ph, products of three intramolecular alkyl migrations were obtained with unhindered trialkylboranes. Attempts have been made to gain understanding of the sulfoxide process by investigating
将三烷基硼烷的三个烷基分子内转移至单个碳原子的已知试剂缺乏影响立体化学的特征。我们研究了四种LiCCl 2 X试剂,其中X可能会发生变化。所有人的行为都不同。在X = OR(R =环己基,薄荷基)的情况下,试剂分解,导致三重迁移产物的收率低。当X = S(O)Ph时,发生一次迁移,然后异构化为烯醇硼化物样物质,该物质水解为α-氯烷基苯基亚砜或与醛反应生成醇醛样产物。X = SO 2时Ph,主要产物是相应的α,α-二氯烷基苯基砜,显然是通过氧化还原反应形成的。在X = S(O)(NMe)Ph的情况下,使用不受阻碍的三烷基硼烷获得了三个分子内烷基迁移的产物。已经尝试通过使用X射线晶体学和从头算来研究类似醛醇的产物的比例来获得对亚砜过程的理解。