(S)-N-(1-(1H-benzo[d][1,2,3]triazol-1-yl)-1-oxo-3-phenylpropan-2-yl)-5-ethyl-8-oxo-5,8-dihydro-[1,3]dioxolo[4,5-g]quinoline-7-carboxamide 、 quinine 在
potassium carbonate 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
以70%的产率得到(2S)-(1R)-(6-methoxyquinolin-4-yl)(5-vinylquinuclidin-2-yl)-methyl 2-(5-ethyl-8-oxo-5,8-dihydro-[1,3]dioxolo[4,5-g]quinoline-7-carboxamido)-3-phenylpropanoate