反应条件
1: With sodium hydroxide in water; N,N-dimethyl-formamide T=25°C; 2 h; 2: With sodium chloride in water; ethyl acetate; N,N-dimethyl-formamide T=25°C; 0.25 h; 3: With 2,3-dihydroxybutanedioic acid in water; ethyl acetate; N,N-dimethyl-formamide T=25°C; 0.25 h;