(2R,3R,4S,5R)-2-[2-((R)-3-amino-pyrrolidin-1-yl)-6-(2,2-diphenyl-ethylamino)-purin-9-yl]-5-(2-ethyl-2H-tetrazol-5-yl)-tetrahydro-furan-3,4-diol trifluoroacetate 、
3-异氰酸吡啶 在
乙腈 、
水 作用下,
以
chloroform dimethyl sulfoxide 为溶剂,
反应 3.0h,
以water (0.1% TFA) (gradient of 0-100% acetonitrile) to afford the titled compound的产率得到1-((R)-1-{6-(2,2-diphenyl-ethylamino)-9-[(2R,3R,4S,5R)-5-(2-ethyl-2H-tetrazol-5-yl)-3,4-dihydroxy-tetrahydro-furan-2-yl]-9H-purin-2-yl}-pyrrolidin-3-yl)-3-pyridin-3-yl-urea trifluoroacetate