Sodium hydride → 6-(2,6-Dibromophenyl)pyrido[2,3-d]pyrimidine-2,7-diamine

Participants

Reaction Steps

To a solution of 0.23 g 60% sodium hydride suspension in 11.0 mL of 2-ethoxyethanol was added 4.18 g of 2,6-dibromophenylacetonitrile and 2.00 g of 2,4-diaminopyrimidine-5-carboxaldehyde. The reaction was refluxed for 4 hours, cooled, and poured into ice water. The residue was washed well with acetonitrile then diethyl ether to give 3.62 g of 6-(2,6-dibromo-phenyl)-pyrido[2,3-d]pyrimidine-2,7-diamine, CIMS (1% NH3 in CH4): 422=M+ +C2H5, 396 (Base), 394=M+ +H, 393=M+ ; mp 284°-289° C.

Provenance & Evidence