Methanol → 2-(S)-{[7-(4-Fluoro-phenoxy)-4-hydroxy-isoquinoline-3-carbonyl]-amino}-propionic acid
Reaction equation
C(O[C:6]([C:8]1[N:9]=[CH:10][C:11]2[C:16]([C:17]=1[OH:18])=[CH:15][CH:14]=[C:13]([O:19][C:20]1[CH:25]=[CH:24][C:23]([F:26])=[CH:22][CH:21]=1)[CH:12]=2)=[O:7])CCC.[NH2:27][C@H:28]([C:30]([OH:32])=[O:31])[CH3:29].CO[Na].CO>>[F:26][C:23]1[CH:24]=[CH:25][C:20]([O:19][C:13]2[CH:12]=[C:11]3[C:16]([C:17]([OH:18])=[C:8]([C:6]([NH:27][C@@H:28]([CH3:29])[C:30]([OH:32])=[O:31])=[O:7])[N:9]=[CH:10]3)=[CH:15][CH:14]=2)=[CH:21][CH:22]=1Participants
5
Conditions
- Temperature
- 130 °C
Procedure
A mixture of 7-(4-fluoro-phenoxy)-4-hydroxy-isoquinoline-3-carboxylic acid butyl ester (154 mg, 0.43 mmol), (S)-alanine (225 mg, 2.5 mmol) and a 0.5 N solution of MeONa in MeOH (5 ml, 2.5 mmol) was heated in a microwave oven with stirring for 20 min at 130° C. before the mixture was concentrated in vacuo. To the residue was added water (15 ml) and the mixture was washed with Et2O (3×30 ml). The purified aq. solution was acidified by the addition of 6 N HCl and extracted with EtOAc (1×30 ml). The organic phase was dried over MgSO4 and concentrated in vacuo to give the title compound as a tan solid (79 mg); MS-(−)-ion M−1=369.1.
Workup
- concentrationwas concentrated in vacuo
- additionTo the residue was added water (15 ml)
- washthe mixture was washed with Et2O (3×30 ml)
- additionThe purified aq. solution was acidified by the addition of 6 N HCl
- extractionextracted with EtOAc (1×30 ml)
- dry with materialThe organic phase was dried over MgSO4
- concentrationconcentrated in vacuo
Sources & evidence
- ORD record
- ord-39d02abffcf8453bb7e4cf062a267e67
- Source dataset
- uspto-grants-2011_01
- Patent number
- US07863292B2
Reaction notes
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