Cu(OTf)<sub>2</sub> catalyzed Ugi-type reaction of <i>N</i>,<i>O</i>-acetals with isocyanides for the synthesis of pyrrolidinyl and piperidinyl 2-carboxamides
作者:Zhuo-Ya Mao、Xiao-Di Nie、Yi-Man Feng、Chang-Mei Si、Bang-Guo Wei、Guo-Qiang Lin
DOI:10.1039/d1cc03113a
日期:——
The Cu(OTf)2 catalyzed Ugi-type reactions of N,O-acetals with isocyanides have been described for the synthesis of pyrrolidinyl and piperidinyl 2-carboxamides. 4-Hydroxy-5-substituted-prolinamides can be obtained in high diastereoselectivities (2,4-cis/trans > 19 : 1) and a stereoselective model was proposed for 2,4-cis selectivity. Moreover, 4-F-VH 032, a novel analog of the VHL ligand, was conveniently