Barium hydroxide, octahydrate → HCID 131733076, compound
Reaction equation
[OH2:1].[NH2:2][C:3]1[CH:8]=[CH:7][C:6]([NH:9][C:10](=[O:16])/[CH:11]=[CH:12]\[C:13]([OH:15])=[O:14])=[CH:5][CH:4]=1.O.O.O.O.O.O.O.O.[OH-].[Ba+2:26].[OH-]>O>[OH2:14].[OH2:1].[NH2:2][C:3]1[CH:4]=[CH:5][C:6]([NH:9][C:10](=[O:16])/[CH:11]=[CH:12]\[C:13]([O-:15])=[O:14])=[CH:7][CH:8]=1.[NH2:2][C:3]1[CH:4]=[CH:5][C:6]([NH:9][C:10](=[O:16])/[CH:11]=[CH:12]\[C:13]([O-:15])=[O:14])=[CH:7][CH:8]=1.[Ba+2:26]Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
Under a nitrogen atmosphere, into a reaction vessel were charged 10.0 g (44.6 mmol) of (2Z)-4-[(4-aminophenyl)amino]-4-oxo-2-butenoic acid mono-hydrate obtained by the same method as in Production Example 2 and 70 ml of water, a solution prepared by dissolving 7.04 g (22.3 mmol) of barium hydroxide octa-hydrate in 30 ml of water was added at 20 to 30° C., and the mixture was stirred at room temperature for 2 hours. Thereafter, the mixture was condensed under reduced pressure and the solvent was distilled off to obtain a residue to which 50 ml of ethanol and 50 ml of 2-propanol were added, and the mixture was stirred at room temperature overnight, the deposited crystal was isolated by filtration, and dried under reduced pressure at 45° C., to obtain 12.4 g of barium bis{(2Z)-4-[(4-aminophenyl)amino]-4-oxo-2-butenoate}di-hydrate as a yellow solid. Yield: 98.3%.