4-[3-(4-羟基苯基)-4,4-二甲基-5-氧代-2-硫代咪唑烷-1-基]-2-三氟甲基苯甲腈 、 (R)-(2,2-dimethyl-1,3-dioxo-pentane-4-yl)methanol 、
1,1'-azodicarbonyl-dipiperidine 、
三丁基膦 在
氩 、 silica gel 、
(R)-4-(3-(4-((2,2-dimethyl-1,3-dioxolan-4-yl)methoxy)phenyl)-4,4-dimethyl-5-oxo-2-thioxoimidazolidin-1-yl)-2-(trifluoromethyl)benzonitrile 作用下,
以
甲苯 为溶剂,
反应 3.0h,
以to obtain the title compound (R)-4-(3-(4-((2,2-dimethyl-1,3-dioxolan-4-yl)methoxy)phenyl)-4,4-dimethyl-5-oxo-2-thioxoimidazolidin-1-yl)-2-(trifluoromethyl)benzonitrile 44a (2.2 g, yield 68.7%) as a yellow solid的产率得到(R)-4-(3-(4-((2,2-dimethyl-1,3-dioxolan-4-yl)methoxy)phenyl)-4,4-dimethyl-5-oxo-2-thioxoimidazolidin-1-yl)-2-(trifluoromethyl)benzonitrile