2-甲基-4-羰基-2-环己烯-1-羧酸乙酯 、
2-trifluoromethyl-β-nitrostyrene 在
S-Α,Α-双(3,5-二甲基苯基)脯氨醇 、
硫脲 作用下,
以
甲苯 为溶剂,
反应 72.0h,
生成 (1S)-3-[(1R)-2-nitro-1-(2-trifluoromethylphenyl)ethyl]-2-methyl-4-oxo-cyclohex-2-enecarboxylic acid ethyl ester 、 (1R)-3-[(1R)-2-nitro-1-(2-trifluoromethylphenyl)ethyl]-2-methyl-4-oxo-cyclohex-2-enecarboxylic acid ethyl ester 、 (1S)-3-[(1S)-2-nitro-1-(2-trifluoromethylphenyl)ethyl]-2-methyl-4-oxo-cyclohex-2-enecarboxylic acid ethyl ester 、
(1R)-3-[(1S)-2-nitro-1-(2-trifluoromethylphenyl)ethyl]-2-methyl-4-oxo-cyclohex-2-enecarboxylic acid ethyl ester