氨甲酸,[3-(三丁基甲锡烷基)-2-丙烯基]-,1,1-二甲基乙基酯,(E)- 、 (5S,7R,8S)-2-methylsulfanyl-5,8-dihydro-8-[(tert-butoxycarbonylmethyl)oxy]-7-hydroxymethyl-5-methoxy-pyrano[3,4-d]pyrimidine 在
四(三苯基膦)钯 、
copper(I) bromide dimethylsulfide complex 作用下,
以
乙二醇二甲醚 为溶剂,
以53%的产率得到(5S,7R,8S)-2-[1-(3-(tert-butoxycarbonylamino))propenyl]-5,8-dihydro-8-[(tert-butoxycarbonylmethyl)oxy]-7-hydroxymethyl-5-methoxy-pyrano[3,4-d]pyrimidine