Catalytic Cross-Coupling Reaction of Esters with Organoboron Compounds and Decarbonylative Reduction of Esters with HCOONH<sub>4</sub>: A New Route to Acyl Transition Metal Complexes through the Cleavage of Acyl−Oxygen Bonds in Esters
作者:Hiroto Tatamidani、Kazuhiko Yokota、Fumitoshi Kakiuchi、Naoto Chatani
DOI:10.1021/jo0492719
日期:2004.8.1
ketones. Acyl−alkyl coupling to dialkyl ketones is also achieved by the use of 9-alkyl-9-BBN in place of boronates. The Ru3(CO)12-catalyzed decarbonylative reduction of esters with ammonium formate (HCOONH4) leading to hydrocarbons is also described. No expected aldehydes are produced, and controlled experiments indicate that aldehydes are not intermediate for the transformation. A hydrosilane can also be
描述了Ru 3(CO)12催化的酯与有机硼化合物的交叉偶联反应,生成酮。在反应条件下可以耐受多种官能团。芳族硼酸盐起偶联伙伴的作用,得到芳基酮。通过使用9-烷基-9-BBN代替硼酸盐也可以实现偶联至二烷基酮的酰基-烷基。在Ru 3(CO)12 -催化decarbonylative还原甲酸铵酯(HCOONH 4也描述了导致碳氢化合物的)。没有产生预期的醛,并且受控实验表明醛不是该转化的中间体。氢化硅烷也可以代替HCOONH 4用作还原剂。两种官能团均兼容。这两个催化反应的关键步骤都是酯中的酯基碳氧键的导向基团促进裂解,从而导致酰基过渡金属烷氧基络合物的生成。