10-methyl-3-sulfanyl-5,10-dihydro-5λ6-benzo[e][1,2,4]triazolo[4,3-b][1,2,4]thiadiazine-5,5-dione 、
(2S)-N-[4-(3-bromopropoxy)-5-methoxy-2-nitrobenzoyl]pyrrolidine-2-carboxaldehyde diethyl thioacetal 在
potassium carbonate 作用下,
以
丙酮 为溶剂,
以85%的产率得到(2S)-N-{4-[3-[(10-methyl-5,5-dioxo-5,10-dihydro-5-benzo[e][1,2,4]triazolo[4,3-b][1,2,4]thiadiazin-3-yl)sulfanyl]propoxy]-5-methoxy-2-nitrobenzoyl}pyrrolidine-2-carboxaldehyde diethyldithioacetal