Triethylamine → 7-Phenyl-4-oxo-2-(2-propoxyphenyl)-3,4-dihydropyrimido[4,5-d]pyrimidine

Participants

Reaction Steps

In a similar manner to Example 3 reaction of ethyl 4-chloro-2-phenyl-5-pyrimidine carboxylate (1.05 g) with 2-propoxybenzamidine (from sodium, 0.10 g, in ethanol, 10 ml, and 2-propoxybenzamidine methanesulphonate, 1.20 g) and triethylamine (0.40 g) in acetonitrile (25 ml) for 3 days at ambient temperature yielded a crude product which was recrystallised from methanol to yield the title compound, 0.52 g, m.p. 203°-4° C.

Provenance & Evidence