[(2R,3R,4R,5R)-5-(2-bromo-6-chloropurin-9-yl)-3,4-bis[[tert-butyl(dimethyl)silyl]oxy]oxolan-2-yl]methoxy-tert-butyl-dimethylsilane 在
二甲基二环氧乙烷 、
N,N-二异丙基乙胺 作用下,
以
甲醇 、
叔丁醇 为溶剂,
反应 25.5h,
生成 {9-[(2R,3R,4R,5R)-3,4-Bis-(tert-butyl-dimethyl-silanyloxy)-5-(tert-butyl-dimethyl-silanyloxymethyl)-tetrahydro-furan-2-yl]-2-bromo-9H-purin-6-yl}-(1S,2R,4S,5R,6S)-3-oxa-tricyclo[3.2.1.0
2,4]oct-6-yl-amine