tert-butyl 4-(2-(4-methoxybenzyl)-5-(4-methoxyphenyl)-1-methyl-6-oxo-6,7-dihydro-3H-benzo[f]pyrazolo[3,4-c][2,7]naphthyridin-9-yl)piperazine-1-carboxylate 、
tert-butyl 4-(5-(4-(benzyloxy)-3-(trifluoromethyl)phenyl)-3-(4-methoxybenzyl)-1-methyl-6-oxo-6,7-dihydro-3H-benzo[f]pyrazolo[3,4-c][2,7]naphthyridin-9-yl)piperazine-1-carboxylate 、
碘乙烷 在
sodium hydride 作用下,
以
N,N-二甲基甲酰胺 、 mineral oil 为溶剂,
反应 3.5h,
以40%的产率得到tert-butyl 4-(5-(4-(benzyloxy)-3-(trifluoromethyl)phenyl)-7-ethyl-3-(4-methoxybenzyl)-1-methyl-6-oxo-6,7-dihydro-3H-benzo[f]pyrazolo[3,4-c][2,7]naphthyridin-9-yl)piperazine-1-carboxylate