Expeditious and Chemoselective Synthesis of α-Aryl and α-Alkyl Selenomethylketones via Homologation Chemistry
作者:Raffaele Senatore、Laura Castoldi、Laura Ielo、Wolfgang Holzer、Vittorio Pace
DOI:10.1021/acs.orglett.8b00896
日期:2018.5.4
Diselenoacetals, previously considered byproducts in homologation tactics en route to α-selenoketones, are herein found to be excellent starting materials for this purpose. The easy selenium/lithium exchange they undergo affords seleno carbanions which are smoothly added to Weinreb amides to chemoselectively prepare α-aryl- and α-alkyl seleno methylketones through a single chemical operation. No racemization