[(3aR,4R,6R,6aR)-6-(6-aminopurin-9-yl)-2,2-dimethyltetrahydrofuro[3,4-d][1,3]dioxol-4-ylmethyl]-(2-hydroxyethyl)carbamic acid 4,5-dimethoxy-2-nitrobenzyl ester 在
四氯化碳 、
三苯基膦 作用下,
以
乙腈 为溶剂,
反应 1.0h,
以94%的产率得到[(3aR,4R,6R,6aR)-6-(6-aminopurin-9-yl)-2,2-dimethyltetrahydrofuro[3,4-d][1,3]dioxol-4-ylmethyl]-(2-chloroethyl)carbamic acid 4,5-dimethoxy-2-nitrobenzyl ester