Aluminumoxyhydride: Improved Synthesis and Application as a Selective Reducing Agent

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• 作者：Brij B. Tewari ; Sukesh Shekar ; Longchuan Huang ; Carolyn E. Gorrell ; Timothy P. Murphy ; Kevin Warren ; Nasri Nesnas ; Rudolf J. Wehmschulte
• 刊名：Inorganic Chemistry
• 出版年：2006
• 出版时间：October 16, 2006
• 年：2006
• 卷：45
• 期：21
• 页码：8807 - 8811
• 全文大小：53K
• 年卷期：v.45,no.21(October 16, 2006)
• ISSN：1520-510X

文摘

Aluminumoxyhydride (HAlO) has been obtained by the reaction of aluminum hydride with the siloxane (Me₂HSi)₂Oor the stannoxane (Bu₃Sn)₂O as an amorphous colorless insoluble powder. The highest-purity product resultedfrom the reaction of H₃Al·NMe₃ with (Me₂HSi)₂O. However, HAlO suspensions in tetrahydrofuran (THF) of sufficientquality for synthetic applications can be prepared from commercially available reagents with only minor precautions.A LiAlH₄ solution in THF was treated successively with Me₃SiCl and (Me₂HSi)₂O, followed by heating at 60 C for20 h. The resulting suspensions are 0.4-0.5 M in active hydride content and selectively reduce aldehydes andketones to the respective alcohols in the presence of any other common nonprotic functional group.