HCID 23312424, compound → HCID 23312423, compound

Participants

Reaction Steps

A solution of 40.2 g of 1-formyl-2-(4,5,6,7-tetrahydro-benzothiazolyl)-hydrazine hydrochloride in 400 ml of ethanol and 100 ml of concentrated hydrochloric acid is boiled under reflux for 4 hours. Concentration of the mixture and drying of the residue gives 41.5 g of 2-hydrazino-4,5,6,7-tetrahydro-benzothiazole hydrochloride of melting point 177°-179° C. as a hygroscopic substance of sufficient purity for further reactions.

Provenance & Evidence