Sec-Butylamine → HCID 131711013, compound

Participants

Reaction Steps

3.0 g. of 6-chloro-2,5-dimethylpyrazolo[1,5-a]-pyrido[3,2-e]pyrimidine-7-carboxylic acid, ethyl ester of Example 1c (0.01 mol.) are dissolved in 20 ml. of alcohol. 2.1 g. of sec. butylamine (0.03 mol.) are added and the mixture is refluxed with stirring for 1 hour. The solvent and excess amine is removed in vacuo and the crystalline residue is treated with water and filtered off to obtain 2,5-dimethyl-6-[(1-methylpropyl)amino]pyrazolo[1,5-a]pyrido[3,2-e]pyrimidine-7-carboxylic acid, ethyl ester, yield 3.1 g. (91%), m.p. 113°-115° (ethyl acetate).

Provenance & Evidence