在
对甲苯磺酸 作用下,
以
乙醇 、
氯仿 为溶剂,
以91%的产率得到2-Dibromomethyl-benzoic acid (2R,3R,4R,5R)-5-(6-benzoylamino-purin-9-yl)-4-[[(2R,3R,4R,5R)-5-(6-benzoylamino-purin-9-yl)-3,4-bis-benzoyloxy-tetrahydro-furan-2-ylmethoxy]-(2-chloro-phenoxy)-phosphoryloxy]-2-hydroxymethyl-tetrahydro-furan-3-yl ester