(2S,3R)-2-methyloxycarbonylamino-3-trimethylsilylhydroxy-4-iodobutyric acid methyl ester 、
4-methyl-6-([D3]-methyl)-3-(2',3',5'-tri-O-acetyl-β-D-ribofuranosyl)-4,9-dihydro-3H-imidazo[1,2-α]-purin-9-one 在
Isobutylmagnesium chloride 、 copper(I) cyanide di(lithium chloride) 作用下,
以
四氢呋喃 为溶剂,
反应 16.5h,
以63%的产率得到(αS,βS)-α-[(methoxycarbonyl)amino]-β-(trimethylsilyloxy)-4-methyl-6-[2H3]-methyl-9-oxo-3-(2',3',5'-tri-O-acetyl-β-D-ribofuranosyl)-4,9-dihydro-3H-imidazo[1,2-α]purine-7-butanoic acid methyl ester