[(2R,3R,4R,5R)-3,4-Dihydroxy-2-(4-hydroxy-2-oxo-2H-pyrimidin-1-yl)-5-trityloxymethyl-tetrahydro-furan-3-yl]-phosphonic acid diethyl ester 在
三氟甲烷磺酰氯 、
4-吡咯烷基吡啶 作用下,
以
二氯甲烷 为溶剂,
反应 1.0h,
以79%的产率得到[(1R,2R,4R,5S)-2-(4-Hydroxy-2-oxo-2H-pyrimidin-1-yl)-4-trityloxymethyl-3,6-dioxa-bicyclo[3.1.0]hex-1-yl]-phosphonic acid diethyl ester