5-hydroxy-2-(3-methyl-butyl)-3-oxo-6-thiophen-2-yl-2,3-dihydro-pyridazine-4-carboxylic acid ethyl ester 、
(4-amino-3-sulfamoyl-phenyl)carbamic acid tert-butyl ester 在
crude product 、 tert-butyl N-[3-[5-hydroxy-2-(3-methylbutyl)-3-oxo-6-thiophen-2-ylpyridazin-4-yl]-1,1-dioxo-4H-1lambda6,2,4-benzothiadiazin-7-yl]carbamate 、
三氟乙酸 、 Boc 、
4-(7-amino-1,1-dioxo-1,2-dihydro-1λ6-benzo[e][1,2,4]thiadiazin-3-yl)-5-hydroxy-2-(3-methyl-butyl)-6-thiophen-2-yl-2H-pyridazin-3-one 作用下,
以
吡啶 为溶剂,
反应 16.0h,
以to afford the desired product, 4-(7-amino-1,1-dioxo-1,2-dihydro-1λ6-benzo[1,2,4]thiadiazin-3-yl)-5-hydroxy-2-(3-methyl-butyl)-6-thiophen-2-yl-2H-pyridazin-3-one (44d) (330 mg, 24.2%)的产率得到4-(7-amino-1,1-dioxo-1,2-dihydro-1λ6-benzo[e][1,2,4]thiadiazin-3-yl)-5-hydroxy-2-(3-methyl-butyl)-6-thiophen-2-yl-2H-pyridazin-3-one