A Practical in situ Generation of the Schwartz Reagent. Reduction of Tertiary Amides to Aldehydes and Hydrozirconation
作者:Yigang Zhao、Victor Snieckus
DOI:10.1021/ol403183a
日期:2014.1.17
A new, highly efficient in situ protocol (Cp2ZrCl2/LiAlH(OBu-t)3) is described for the generation of the Schwartz reagent which provides a convenient method for the amide to aldehyde reduction and the regioselective hydrozirconation–iodination of alkynes and alkenes. Highlighted are chemoselective reductions of benzamides derived by directed ortho metalation (DoM) chemistry, allowing the synthesis
描述了一种新的高效原位实验方案(Cp 2 ZrCl 2 / LiAlH(OBu- t)3),用于产生Schwartz试剂,该试剂为酰胺到醛的还原以及炔烃的区域选择性加氢锆化加碘提供了便利的方法。和烯烃。突出显示的是通过定向邻位金属化(D o M)化学反应生成的苯甲酰胺的化学选择性还原,可合成有价值的1,2,3-取代的苯甲醛。单步三组分过程在非常短的反应时间内进行,显示出极好的官能团相容性,并使用廉价且长期保存的稳定还原剂。