1: 2-[(3-nitrophenyl)methylene]-3-oxobutanoic acid 2-[(3,3-diphenylpropyl)methylamino]-1,1-dimethyl ethyl ester hydrochloride With triethylamine in propan-1-ol T=25 - 40°C; 0.166667 h; 2: methyl 3-aminocrotonate in propan-1-ol T=75 - 80°C; 10 h; 3: With hydrogenchloride in propan-1-ol T=25 - 30°C; pH=2; 0.5 h;