1: With sulfuric acid; dichromic acid in water; acetone T=0 - 5°C; 1 h; 2: With sodium hydroxide in diethyl ether; water 3: With hydrogenchloride in water pH=2 - 3;
参考文献
GLAXO GROUP LIMITED
Patent: WO2006/2956 A1, 2006 ;
Location in patent: Page/Page column 33 ;
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