1,1-dimethylethyl {(1S)-1-methyl-3-[(3-pyridinylmethyl)amino]propyl}carbamate 、 1,1-dimethylethyl[(1S)-3-amino-1-methylpropyl]carbamate 、
3-吡啶甲醛 、
1,1-二氯乙烷 、
三乙酰氧基硼氢化钠 、 (4S,12aS)-N-[(2,4-difluorophenyl)methyl]-7-hydroxy-4-methyl-6,8-dioxo-1-(3-pyridinylmethyl)-1,2,3,4,6,8,12,12a-octahydropyrido[1',2':4,5]pyrazino[1,2-a]pyrimidine-9-carboxamide 、 、 [(3S)-3-aminobutyl](3-pyridinylmethyl)amine 在
1,1-dimethylethyl 作用下,
以
二氯甲烷 、
溶剂黄146 、
四氢呋喃 为溶剂,
反应 2.5h,
以to give (4S,12aS)—N-[(2,4-difluorophenyl)methyl]-4-methyl-6,8-dioxo-7-[(phenylmethyl)oxy]-1-(3-pyridinylmethyl)-1,2,3,4,6,8,12,12a-octahydropyrido[1′,2′:4,5]pyrazino[1,2-a]pyrimidine-9-carboxamide (72 mg, 95%) as a film的产率得到(4S,12aS)-N-[(2,4-difluorophenyl)methyl]-4-methyl-6,8-dioxo-7-[(phenylmethyl)oxy]-1-(3-pyridinylmethyl)-1,2,3,4,6,8,12,12a-octahydropyrido[1',2':4,5]pyrazino[1,2-a]pyrimidine-9-carboxamide