(R)-3-甲氧基二氢-2H-吡喃-4(3H)-酮 、
tert-butyl (1S,4S)-5-{[(1S,3R)-3-amino-1-(2,2-difluoroethyl)cyclopentyl]carbonyl}-2,5-diazabicyclo[2.2.1]heptane-2-carboxylate 在
三乙酰氧基硼氢化钠 作用下,
以
二氯甲烷 为溶剂,
以47%的产率得到1,5-anhydro-3-{[(1R,3S)-3-{[(1S,4S)-5-(tert-butoxycarbonyl)-2,5-diazabicyclo[2.2.1]hept-2-yl]carbonyl}-3-(2,2-difluoroethyl)cyclopentyl]amino}-2,3-dideoxy-4-O-methyl-D-erythro-pentitol