sulfur; diethylamine in ethanol T=45 - 50°C; Gewald reaction;

1: malonic acid dimethyl ester With sodium methylate in methanol 0.5 h; 2: Cyanocarbamidomethylenecyclohexane in methanol T=30°C; 2 h; 3: With hydrogenchloride; methanol; sodium hydroxide; water Product distribution / selectivity; more than 3 stages;

ammonium acetate; acetic acid

copper (II) acetate monohydrate in water; acetic acid T=80°C; stereoselective reaction;

in dichloromethane 1 h; Irradiation;