Dimethylformamide → 1,3-Propanediamine,n3-(4-chloro-1h-indazol-3-yl)-n1,n1-diethyl-

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Reaction Conditions

Reaction Steps

A mixture consisting of 5.04 g of 3-amino-4-chloroindazole, 8.30 g of 3-bromopropyldiethylamine hydrobromide, 8.3 g of anhydrous potassium carbonate and 80 ml of anhydrous N,N-dimethylformamide was stirred for 24 hours at 80° C. The reaction mixture was condensed under reduced pressure, the condensed residue was added with 100 ml of chloroform and 50 ml of water. The chloroform layer was separated and dried over anhydrous sodium sulfate, and then chloroform was removed under reduced pressure. The residue thus obtained was subjected to an alumina-column chromatography (alumina: 200 g) using chloroform as the developing solvent to give 5.16 g of 3-(3-diethylaminopropylamino)-4-chloroindazole having the following analytical values in a yield of 61%.

Provenance & Evidence