1: With N,N-di-methylaminopyridine in methanol T=20°C; 3 h; 2: With calcium chloride in tetrahydrofuran; ethanol T=0°C; 3: With sodium tetrahydroborate; manganese(IV) oxide more than 3 stages;
参考文献
Kureha Chemical Industry Co., Ltd.
Patent: EP1550657 A1, 2005 ;
Location in patent: Page/Page column 73-74 ;