4-aminobenzenesulfonic acid T=100°C; Biginelli reaction; 0.833333 h; Neat (no solvent);

1: 4-hydroxymethyl-N,N-dimethylaniline With T3P®; dimethyl sulfoxide in ethyl acetate T=20°C; Biginelli Pyrimidone Synthesis; Inert atmosphereGreen chemistry; 2: ethyl acetoacetate; urea in ethyl acetate T=60 - 70°C; Biginelli Pyrimidone Synthesis; Inert atmosphereGreen chemistry;

Bi(NO3)3 T=100°C; Biginelli reaction; 0.333333 h;

Bi(NO3)3 T=100°C; Biginelli reaction; 0.25 h;

hydrogenchloride in ethanol; water T=140°C; 0.05 h; Microwave irradiation;