1: 2-(2-tert-butoxycarbonylamino-pyridin-4-yl)-1-(3-methylphenyl)ethanone With bromine in acetic acid T=20°C; 0.5 h; 2: ethanethioamide in N,N-dimethyl-formamide T=20°C; 20 h; 3: With hydrogenchloride in water T=100°C; 1 h;
参考文献
Takeda Chemical Industries, Ltd.
Patent: EP1180518 A1, 2002 ;
Location in patent: Referential example 17 ;