Sodium Hydroxide → HCID 3063369, compound
Reaction equation
[S:1]1[CH:5]=[CH:4][C:3]([CH:6]=[CH:7][C:8]2[O:13][C:12](=[O:14])[C:11]3[CH:15]=[CH:16][CH:17]=[CH:18][C:10]=3[N:9]=2)=[CH:2]1.[OH-:19].[Na+]>CO>[S:1]1[CH:5]=[CH:4][C:3]([CH:6]=[CH:7][C:8]([NH:9][C:10]2[CH:18]=[CH:17][CH:16]=[CH:15][C:11]=2[C:12]([OH:19])=[O:14])=[O:13])=[CH:2]1Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Conditions
- Temperature
- 70 °C
Procedure
To 2-[2-(3-thienyl)vinyl]-4H-3,1-benzoxazine-4-one (800 mg, 3.13 mmol) was added 1N-NaOH (21.9 ml) and the mixture was heated to 70° C. After adding methanol (30 ml), and the mixture was reacted for 1 hour. The methanol was removed from the reaction mixture under reduced pressure, and the residue was acidified with 10% HCl under cooling (pH about 4) to give a white solid, which was collected on a filter, washed with water, and dried to give the title compound (826 mg, yield, 96%). m.p., 218°-219° C.