Hydrochloric Acid → HCID 178470423, compound

Participants

Reaction Steps

A solution of 3-methyl-4-nitropyrazole-5-carboxylic acid (70.4 g, 0.41 mol) in ethanol (300 ml) was saturated with hydrogen chloride prepared from the combination of concentrated hydrochloric acid (430 ml) and concentrated sulphuric acid (430 ml) at 0°. After standing overnight at room temperature, the reaction mixture was evaporated to dryness yielding 77.1 g (94%) of an oil which crystallized after seeding, m.p. 81°-86°.

Provenance & Evidence