作者:James H. Babler、Matthew C. Atwood、Jonathan E. Freaney、Anthony R. Viszlay
DOI:10.1016/j.tetlet.2007.08.096
日期:2007.10
An indirect method to effect cross-aldol coupling of two nonequivalent enolizable aldehydes is reported that involves initial conversion of one aldehyde to an imine derivative possessing an N-3° alkyl substituent. In sharp contrast to the related couplings (e.g., the use of α-lithiated imines at low temperature), condensation between the imine and several representative aldehydes occurs readily at
报道了一种实现两种不等价可烯化醛的交叉-醛醇缩合偶联的间接方法,该方法包括将一种醛初始转化为具有N -3°烷基取代基的亚胺衍生物。与相关的偶联剂(例如,在低温下使用α-锂化的亚胺)形成鲜明对比的是,在室温下,在催化量的氯化钴(II)存在下,亚胺与几种代表性醛之间的缩合容易发生。