Phosphorus oxychloride → HCID 15620865, compound

Participants

Reaction Steps

According to Khim. Geterosikl. Soedin, 6, 765, 1975, ethyl-2-amino-4,5-dimethyl-thiophene-3-carboxylate is reacted with 2-methoxy-pyrroline in the presence of phosphoryl chloride and the obtained 2,3-dimethyl-4-oxo-5,6-tetramethylene-4H-thieno[2,3-d]pyrimidine is desulphurated in an alcoholic solution with Raney-nickel and thus 3-(1-methyl-propyl)-4-oxo-4,6,7,8-tetrahydro-pyrrolo[1,2-a]pyrimidine is obtained. In the complicated two-step synthesis the pyrrolo-pyrimidine derivative is obtained with a yield of 36.5%.

Provenance & Evidence