2,5-anhydro-3,4-di-O-benzyl-1-deoxy-1-(uracil-1'-yl)-6-(5''-amino-1'',5''-dideoxy-2'',3''-O-isopentylidene-β-D-ribos-1''-yl)-D-glucitol 、
N,N'-bis-Boc-S-methyl-isothiourea 在
三乙胺 、 mercury dichloride 作用下,
以
二氯甲烷 为溶剂,
反应 36.0h,
以90%的产率得到2,5-anhydro-3,4-di-O-benzyl-1-deoxy-1-(uracil-1'-yl)-6-(5''-(N,N'-bis-(tert-butyloxycarbonyl)guanidino)-1'',5''-dideoxy-2'',3''-O-isopentylidene-β-D-ribos-1''-yl)-D-glucitol