Unexpected Side Product Formed during LDA-induced Phosphonylation of Uridine
作者:Palash Bhar、Stephen L. Bearne
DOI:10.1246/cl.170005
日期:2017.4.5
LDA-induced coupling of 2′,3′,5′-O-protected uridine with diethyl chlorophosphate, during the synthesis of 6-phosphonouridine, is accompanied by the formation of an unexpected side product. LDA adds slowly to the C4 position of the 2′,3′,5′-O-protected uridine after the initial reaction with diethyl chlorophosphate. The presence of the phosphorochloridate facilitates the side reaction. This observation accounts