1: With sodium hydrogencarbonate in tetrahydrofuran T=0°C; 2: With trifluoroacetic anhydride in tetrahydrofuran T=0 - 20°C; 1 h; 3: With pyridine in tetrahydrofuran T=0 - 20°C; 3 h;
参考文献
Takeda Chemical Industries, Ltd.
Patent: EP1186604 A1, 2002 ;
Location in patent: Page 110 ;
EP 1186604 A1