1: With hydrogenchloride; sodium nitrite in water T=0°C; 0.5 h; 2: With sodium acetate in water pH=~ 5; 3: With hydrogenchloride; potassium tert-butylate; 2-methylpropane-2-thiol more than 3 stages;
参考文献
Bristol-Myers Squibb Company
Patent: US2009/18132 A1, 2009 ;
Location in patent: Page/Page column 56 ;
US 20090018132 A1