Practical hydroxymethylation of aldehydes and ketones via pinacol cross-coupling reactions with paraformaldehyde
作者:Jeonghan Park、Steven F. Pedersen
DOI:10.1016/s0040-4020(01)88875-x
日期:——
method for the direct hydroxymethylation of aldehydes and ketones via pinacol cross-coupling with paraformaldehyde is described. The reaction is promoted by vanadium(II) ions which are conveniently generated from the reduction of VCl3(THF)3 with zinc dust. Excellent yields of terminal diols are obtained and stereoselective coupling is observed with some chiral aldehydes and ketones.
描述了通过频哪醇与多聚甲醛交叉偶联直接醛和酮进行羟甲基化的一般实用方法。钒(II)离子可促进反应,钒离子可通过用锌粉还原VCl 3(THF)3方便地产生。获得了优异的末端二醇收率,并且观察到与一些手性醛和酮的立体选择性偶联。