Acetone → Incadronic Acid

Participants

Reaction Steps

4.0 g of tetraethyl (cycloheptylamino)methylenebis(phosphonate) was dissolved in 40 ml of concentrated hydrochloric acid and heated under reflux for 2.5 hours. After cooling, the reaction solution was concentrated under reduced pressure to eliminate hydrochloric acid. Then, 30 ml of purified water was added to the residue and the mixture was again concentrated under reduced pressure. The oily product thus obtained was solidified by methanol and acetone and subject to the filtration. The residue was washed with acetone to give 2.5 g of (cycloheptylamino)methylenebis(phosphonic acid) as a white solid.

Provenance & Evidence