Dimethylformamide → HCID 69845455, compound

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Reaction Steps

A mixture of 1-(2-tosyloxyethyl)-7-(3-fluoro-4-methoxyphenyl)-1H-pyrazolo[3,4-g]quinoxaline (0.3 g), piperdine (0.11 g) and 20 ml of anhydrous DMF is stirred at room temperature overnight. The mixture is heated to gentle reflux for 21/2 hours. After cooling, it is poured into water and the precipitate is filtered, washed with water and air dried. This is then purified by chromatography using (3:7-1:9) methylene chloride in ethylacetate as eluent. 0.220 g of desired product to obtain 1-(2-piperdin-1-ylethyl)-7-(3-fluoro-4-methoxyphenyl)-1H-pyrazolo[3,4-g]quinoxaline (m.p. 117°-120° C. (dec)).

Provenance & Evidence