1: With diphenyl phosphoryl azide; triethylamine in N,N-dimethyl-formamide T=20 - 100°C; 18 h; 2: With hydrogenchloride in water; N,N-dimethyl-formamide
参考文献
Boehringer Ingelheim International GmbH
Patent: US2006/116370 A1, 2006 ;
Location in patent: Page/Page column 7 ;