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 、
N,N-二异丙基乙胺 、
吡啶 、
氯甲酸甲酯 在
{3-[5-hydroxy-2-(3-methyl-butyl)-3-oxo-6-thiophen-2-yl-2,3-dihydro-pyridazin-4-yl]-1,1-dioxo-1,2-dihydro-1λ6-benzo[e][1,2,4]thiadiazin-7-yl}-carbamic acid methyl ester 、 3-[5-hydroxy-2-(3-methyl-butyl)-3-oxo-6-thiophen-2-yl-2,3-dihydro-pyridazin-4-yl]-1,1-dioxo-1,2-dihydro-1 、 benzo[1,2,4]thiadiazin-7-yl 作用下,
以
乙腈 为溶剂,
反应 16.0h,
以to afford the desired product, {3-[5-hydroxy-2-(3-methyl-butyl)-3-oxo-6-thiophen-2-yl-2,3-dihydro-pyridazin-4-yl]-1,1-dioxo-1,2-dihydro-1×6 benzo[1,2,4]thiadiazin-7-yl}-carbamic acid methyl ester (48) (20 mg, 59.5%)的产率得到{3-[5-hydroxy-2-(3-methyl-butyl)-3-oxo-6-thiophen-2-yl-2,3-dihydro-pyridazin-4-yl]-1,1-dioxo-1,2-dihydro-1λ6-benzo[e][1,2,4]thiadiazin-7-yl}-carbamic acid methyl ester