Selective Reduction of Esters to Aldehydes under the Catalysis of Well-Defined NHC-Iron Complexes
作者:Haoquan Li、Luis C. Misal Castro、Jianxia Zheng、Thierry Roisnel、Vincent Dorcet、Jean-Baptiste Sortais、Christophe Darcel
DOI:10.1002/anie.201303003
日期:2013.7.29
a direct course to the aldehyde: Hydrosilylation catalyzed by a well‐defined N‐heterocyclic‐carbene–iron complex under UV irradiation enabled the selective reduction of esters to aldehydes (see scheme; Bn=benzyl, Mes=mesityl). The low catalyst loading and very mild reaction conditions make this chemoselective transformation a promising alternative to the reduction of esters with diisobutylaluminum
在直接接触醛的过程中:在紫外线照射下,由定义明确的N-杂环-卡宾-铁络合物催化的氢化硅烷化作用使酯选择性地还原为醛(参见方案; Bn =苄基,Mes =间苯二甲酰)。低的催化剂负载量和非常温和的反应条件使这种化学选择性转化成为用二异丁基氢化铝还原酯的有前途的替代方法。