Low Coordinate Germanium(II) and Tin(II) Hydride Complexes: Efficient Catalysts for the Hydroboration of Carbonyl Compounds

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• 作者：Terrance J. Hadlington ; Markus Hermann ; Gernot Frenking ; Cameron Jones
• 刊名：Journal of the American Chemical Society
• 出版年：2014
• 出版时间：February 26, 2014
• 年：2014
• 卷：136
• 期：8
• 页码：3028-3031
• 全文大小：254K
• 年卷期：v.136,no.8(February 26, 2014)
• ISSN：1520-5126

文摘

This study details the first use of well-defined low-valent p-block metal hydrides as catalysts in organic synthesis. That is, the bulky, two-coordinate germanium(II) and tin(II) hydride complexes, L^{鈥?/sup>(H)M: (M = Ge or Sn, L鈥?/sup> = 鈭扤(Ar鈥?/sup>)(SiPri₃), Ar鈥?/sup> = C₆H₂{C(H)Ph₂}₂Pri-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 as low as 0.05 mol % are required to achieve quantitative conversions, with turnover frequencies in excess of 13鈥?00 h鈥? in some cases. This activity rivals that of currently available catalysts used for such reactions.}