Selective reduction of tertiary alkyl, benzyl, and allyl halides to hydrocarbons using lithium 9,9-di-n-butyl-9-borabicyclo[3.3.1]nonanate
作者:Hiroo Toi、Yoshinori Yamamoto、Akio Sonoda、Shun-Ichi Murahashi
DOI:10.1016/s0040-4020(01)97982-7
日期:——
The title 9-borabicyclo[3.3.1]nonane(9-BBN) ate complex (1) brings about selective removal of tertiary alkyl, benzyl and allyl halides to give the corresponding hydrocarbons in excellent yields without concomitant attack on secondary, primary and aryl derivatives. The reduction of cis- and trans - 4 - t - butyl - 1 - methylcyclohexyl chlorides (2) with 1 gives 4 - t - butyl - 1 - methylcyclohexanes
标题9-borabicyclo [3.3.1]壬烷(9-BBN)配合物(1)可以选择性地除去叔烷基,苄基和烯丙基卤,从而以优异的收率得到相应的烃,而不会伴随着对仲,伯和芳基的攻击衍生品。的还原顺式-和反式- 4 -吨-丁基- 1 -甲基环己基氯化物(2)与1给出4 -吨-丁基- 1 - methylcyclohexanes(3),在环己烷的配置的局部反转,而在苯给出热力学稳定的反式- 3为主。1,1-二甲基-5-己烯基氯化物的反应(4)和1,7,7- -三甲基二环[2.2.1]庚- 2 -基磺酰氯(8)配有1继续进行到碳离子中间特性的重排。要求1所述的还原-乙基- 1 -甲基戊基氯与1如下二阶速率方程。