1-[(5R,6R,7R,9R)-4-氨基-6-(叔丁基-二甲基硅烷基)氧基-9-[(叔丁基-二甲基硅烷基)氧基甲基]-2,2-二氧代-1,8-二氧杂-2-硫杂螺[4.4]壬-3-烯-7-基]-5-甲基嘧啶-2,4-二酮 、
3'-azido-3-N-(4-bromo-2-(E)-butenyl)-3'-deoxythymidine 在
potassium carbonate 作用下,
以
乙腈 为溶剂,
反应 4.0h,
以73%的产率得到3-[(E)-4-[3-[(5R,6R,8R,9R)-4-amino-9-[tert-butyl(dimethyl)silyl]oxy-6-[[tert-butyl(dimethyl)silyl]oxymethyl]-2,2-dioxo-1,7-dioxa-2lambda6-thiaspiro[4.4]non-3-en-8-yl]-5-methyl-2,6-dioxopyrimidin-1-yl]but-2-enyl]-1-[(2R,4S,5S)-4-azido-5-(hydroxymethyl)oxolan-2-yl]-5-methylpyrimidine-2,4-dione