Low Coordinate Germanium(II) and Tin(II) Hydride Complexes: Efficient Catalysts for the Hydroboration of Carbonyl Compounds
作者:Terrance J. Hadlington、Markus Hermann、Gernot Frenking、Cameron Jones
DOI:10.1021/ja5006477
日期:2014.2.26
p-block metal hydrides as catalysts in organic synthesis. That is, the bulky, two-coordinate germanium(II) and tin(II) hydride complexes, L(†)(H)M: (M = Ge or Sn, L(†) = -N(Ar(†))(SiPr(i)3), Ar(†) = C6H2C(H)Ph2}2Pr(i)-2,6,4), are shown to act as efficient catalysts for the hydroboration (with HBpin, pin = pinacolato) of a variety of unactivated, and sometimes very bulky, carbonyl compounds. Catalyst loadings
该研究详细介绍了明确定义的低价 p 嵌段金属氢化物在有机合成中作为催化剂的首次使用。也就是说,体积庞大的双配位锗 (II) 和锡 (II) 氢化物配合物 L(†)(H)M:(M = Ge 或 Sn,L(†) = -N(Ar(†)) (SiPr(i)3), Ar(†) = C6H2C(H)Ph2}2Pr(i)-2,6,4),被证明是硼氢化反应的有效催化剂(HBpin,pin = pinacolato ) 的各种未活化的,有时非常庞大的羰基化合物。需要低至 0.05 mol% 的催化剂负载才能实现定量转换,在某些情况下,营业额频率超过 13 300 h(-1)。该活性可与用于此类反应的当前可用催化剂相媲美。