Synthesis and Reactivity of <i>o</i>-Benzylphosphino- and <i>o</i>-α-Methylbenzyl(<i>N</i>,<i>N</i>-dimethyl)amine-Boranes
作者:Zachariah M. Heiden、Michael Schedler、Douglas W. Stephan
DOI:10.1021/ic102044z
日期:2011.2.21
energies for the products of hydrogenation, the phosphonium and ammonium hydridoborates, were computed. In all cases, these products were endothermic with respect to the precursor phosphine-boranes and amine-boranes and H2. The barriers to H2 activation were found to be in the range of 24−38 kcal/mol. These theoretical studies also demonstrate that the steric bulk around the boron center dramatically affects
该系列的邻benzylphosphino-硼烷,邻-(R 2乙)C 6 H ^ 4 CH 2 P吨卜2(R =氯3中,Ph 4中,Cy 6,C 6 ˚F 5 7,MES 8)和邻(BBN)C 6 H 4 CH 2 P t Bu 2 (5)由各自的氯硼烷与锂化的苄基膦反应合成。以类似的方式,α-甲基苄基(N,制备了N-二甲基)胺-硼烷邻-(R 2 B)C 6 H 4 CH(Me)NMe 2(R = Cl 10,Ph 11,Cy 12,C 6 F 5 13,Mes 14)。虽然这些物种是在催化加氢不活动吨BuN═CHPh,化合物7,8,和14并用H反应2在高温下(100℃),导致消除HC的6 ˚F 5和均三甲苯。在后一种情况下,分离出了o-((Mes)HB)C 6 H 4 CH(Me)NMe 2 15物种。还显示了14与H 2 O反应生成o-((Mes)(HO)B)C 6 H 4 CH(Me)NMe