Hydrogen Bromide → N-[1-(2-aminoethyl)-4-piperidinyl]-1-(4-thiazolylmethyl)-1H-benzimidazol-2-amine trihydrobromide

Participants

Reaction Steps

A mixture of 14 parts of ethyl [2-[4-[[1-(4-thiazolylmethyl)-1H-benzimidazol-2-yl]amino]-1-piperidinyl]ethyl]carbamate and 300 parts of a hydrobromic acid solution 48% in water was stirred and refluxed for 30 minutes. The reaction mixture was evaporated. The sticky residue solidified in a mixture of ethanol and acetonitrile. The product was filtered off and dried, yielding 14 parts of N-[1-(2-aminoethyl)-4-piperidinyl]-1-(4-thiazolylmethyl)-1H-benzimidazol-2-amine trihydrobromide (intermediate 134).

Provenance & Evidence