7-[[(7R)-8-cyclopentyl-7-ethyl-5-methyl-6-oxo-7H-pteridin-2-yl]amino]-2,2-dimethyl-3H-benzofuran-4-carboxylic acid 、
(cis-exo)-2-methyl-3,3a,4,5,6,6a-hexahydro-1H-cyclopenta[c]pyrrol-5-ylamine 在
O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate 、
N,N-二异丙基乙胺 作用下,
以
二氯甲烷 为溶剂,
反应 1.5h,
以19.5%的产率得到(cis-exo)-N-[2-methyl-3,3a,4,5,6,6a-hexahydro-1H-cyclopenta[c]pyrrol-5-yl]-7-[[(7R)-8-cyclopentyl-7-ethyl-5-methyl-6-oxo-7H-pteridin-2-yl]amino]-2,2-dimethyl-3H-benzofuran-4-carboxamide