N-[3-[2-tert-butyl-1-[(3-chloro-4-fluoro-phenyl)methyl]-3-hydroxy-5-oxo-2H-pyrrol-4-yl]-1,1-dioxo-4H-1$l^{6},4-benzothiazin-7-yl]methanesulfonamide 、
4-甲苯磺酰氰 在
吡啶 作用下,
反应 1.0h,
以33%的产率得到N-{3-[5-tert-butyl-1-(3-chloro-4-fluoro-benzyl)-4-hydroxy-2-oxo-2,5-dihydro-1H-pyrrol-3-yl]-2-cyano-1,1-dioxo-1,4-dihydro-1λ6-benzo[1,4]thiazin-7-yl}-methanesulfonamide