作者:Nanao Watanabe、Masaya Okano、Sakae Uemura
DOI:10.1246/bcsj.47.2745
日期:1974.11
The reaction of secondary and tertiary alkyl halides with mercuric thiocyanate in less-polar solvents e.g., n-hexane, di-n-butyl ether, and 1,2-dichloroethane) was found to afford predominantly N-alkylation products, alkyl isothiocyanates, in contrast to the reaction with potassium salt in DMF. Especially, from t-butyl bromide, α-phenethyl bromide and benzhydryl chloride, the corresponding pure isothiocyanates
发现仲和叔烷基卤化物与硫氰酸汞在极性较小的溶剂(例如正己烷、二正丁基醚和 1,2-二氯乙烷)中的反应主要提供 N-烷基化产物,即异硫氰酸烷基酯,与在 DMF 中与钾盐的反应相反。尤其是从叔丁基溴、α-苯乙基溴和二苯甲基氯中,以良好的收率获得了相应的纯异硫氰酸酯。基于相对速率数据、与旋光α-苯乙基溴反应的立体化学结果以及银盐或汞盐在SN1反应中的众所周知的催化作用,提出了最可能的反应机理。