Molecular Addition Compounds. 12. Borane Adducts of Trialkylamines with Isopropyl and Isobutyl Groups of Intermediate Steric Requirements for Hydroboration
作者:Herbert C. Brown、Marek Zaidlewicz、Pramod V. Dalvi、Srinivasan Narasimhan、Aloka Mukhopadhyay
DOI:10.1021/om9806287
日期:1999.3.1
Borane adducts of selected trialkylamines with isopropyl and isobutyl groups of intermediate steric requirements have been prepared and examined as hydroborating agents. Their reactivity toward 1-octene follows the order i-Pr2NEt·BH3 < i-Bu3N·BH3 < i-PrNBui2·BH3 < i-Pr2NCH2CH2OMe·BH3 < i-Pr2NBui·BH3 < i-Pr3N·BH3 < i-Pr2NBus·BH3. Borane adducts with i-Pr2NBui, i-Pr3N, and i-Pr2NBus are highly reactive
制备了具有中等空间要求的异丙基和异丁基的选定的三烷基胺的硼烷加合物,并将其作为氢硼酸酯化剂进行了研究。他们对1-辛烯的反应性如下顺序我-Pr 2净·BH 3 <我-Bu 3 N·BH 3 <我-PrNBu我2 ·BH 3 <我-Pr 2 NCH 2 CH 2 OME·BH 3 <我-Pr 2 NBU我·BH 3 < i -Pr 3 N·BH 3 < i -Pr 2 NBu s·BH 3。硼烷与i -Pr 2 NBu i加合物,我-Pr 3 N,和我-Pr 2 NBU小号在室温下不到1小时内,它们在THF中具有高反应活性,氢硼化1-辛烯。加合物i -Pr 2 NBu i·BH 3是一种高于0°C的液体,在BH 3中为4.6 M,可长期稳定,可溶于乙醚,叔丁基甲基醚,四氢呋喃,二恶烷,二氯甲烷和正戊烷。i -Pr 3 N·BH 3加合物为固体,而i -Pr 2 NBu s为加合物。·BH 3在