Hydrochloric Acid → HCID 131718310, compound
Reaction equation
[N:1]1[CH:6]=[CH:5][CH:4]=[CH:3][C:2]=1[O:7][CH2:8][CH2:9][CH2:10][CH2:11][NH:12][CH:13]([P:22](=[O:29])([O:26]CC)[O:23]CC)[P:14](=[O:21])([O:18]CC)[O:15]CC.[ClH:30]>>[OH2:7].[ClH:30].[N:1]1[CH:6]=[CH:5][CH:4]=[CH:3][C:2]=1[O:7][CH2:8][CH2:9][CH2:10][CH2:11][NH:12][CH:13]([P:22](=[O:23])([OH:26])[OH:29])[P:14](=[O:15])([OH:18])[OH:21].[N:1]1[CH:6]=[CH:5][CH:4]=[CH:3][C:2]=1[O:7][CH2:8][CH2:9][CH2:10][CH2:11][NH:12][CH:13]([P:22](=[O:23])([OH:26])[OH:29])[P:14](=[O:15])([OH:18])[OH:21].[ClH:30]Participants
3
Procedure
A mixture of tetraethyl 4-(2-pyridyloxy)butylaminomethylenebisphosphonate (0.85 g) and conc. hydrochloric acid (10 ml) was heated for 2 hours under reflux. The reaction mixture was concentrated under reduced pressure. The concentrate was treated with methanol to give a solid matter, which was recrystallized from water-methanol to give 4-(2-pyridyloxy)butylaminomethylenebisphosphonic acid hydrochloride hemihydrate (0.471 g, 65%), m.p. 155° C. to 157° C.
Workup
- temperaturewas heated for 2 hours
- temperatureunder reflux
- concentrationThe reaction mixture was concentrated under reduced pressure