Competition between intra- and inter-molecular reactions of borates: a new route to 1,4-dihydro-1,4-distannines
作者:Susanna Kerschl、Bernd Wrackmeyer
DOI:10.1039/c39860001170
日期:——
The reaction of the system (E)-2-dimethyl(chloro)stannyl-3-diethylborylpent-2-ene (1)–LiNEt2 in hexane can be controlled to give 1,4-dihydro-1,1,2,4,4,5-hexamethyl-3,6-diethyl-1,4-distannine (3) in high yield, demonstrating the intermediacy of aminoborate (5) and the preference (under the reaction conditions) of intermolecular electrophilic attack at the B–C bond accompanied by final elimination of
可以控制系统(E)-2-二甲基(氯)锡烷基-3-二乙基硼基戊-2-烯(1)-LiNEt 2在己烷中的反应,得到1,4-二氢-1,1,2,4 ,4,5-六甲基-3,6-二乙基-1,4-二氢萘胺(3)高产,证明了氨基硼酸酯(5)的中间体和B–分子间亲电性攻击的偏爱(在反应条件下) C键伴随着LiCl和Et 2 NBEt 2(4)的最终消除。