Water → N-Fmoc-3-fluoro-L-tyrosine
Reaction equation
[NH2:1][C@@H:2]([CH2:6][C:7]1[CH:12]=[CH:11][C:10]([OH:13])=[C:9]([F:14])[CH:8]=1)[C:3]([OH:5])=[O:4].[CH:15]1[C:27]2[CH:26]([CH2:28][O:29][C:30](ON3C(=O)CCC3=O)=[O:31])[C:25]3[C:20](=[CH:21][CH:22]=[CH:23][CH:24]=3)[C:19]=2[CH:18]=[CH:17][CH:16]=1.O>C(=O)([O-])[O-].[Na+].[Na+]>[CH:15]1[C:27]2[CH:26]([CH2:28][O:29][C:30]([NH:1][C@@H:2]([CH2:6][C:7]3[CH:12]=[CH:11][C:10]([OH:13])=[C:9]([F:14])[CH:8]=3)[C:3]([OH:5])=[O:4])=[O:31])[C:25]3[C:20](=[CH:21][CH:22]=[CH:23][CH:24]=3)[C:19]=2[CH:18]=[CH:17][CH:16]=1Participants
Reactant 3
Product 1
Reagents, catalysts & solvents 1
Procedure
(S)-2-Amino-3-(3-fluoro-4-hydroxyphenyl)propanoic acid (H-Tyr(3-F)-HH, SP449) (7.2 g, 36.2 mmol) was dissolved in a 10% aqueous sodium carbonate solution (250 ml), N-(9-fluorenylmethoxycarbonyloxy)-succinimide (12.2 g, 36.2 mmol) was added and the mixture was stirred at room temperature for 1.5 hours. Water (120 ml) was added to the reaction solution, and the mixture was then washed with 200 ml of diethyl ether twice and with 100 ml of diethyl ether once. The aqueous layer was made acidic (pH=2) by adding a 6 N aqueous HCl solution thereto, and then extracted with 250 ml of ethyl acetate twice and with 200 ml of ethyl acetate once. The resulting ethyl acetate layer was dried over anhydrous magnesium sulfate, filtered and concentrated under reduced pressure to afford the title compound (SP450, 15.3 g, 100%).
Workup
- additionwas added
- washthe mixture was then washed with 200 ml of diethyl ether twice
- additionby adding a 6 N aqueous HCl solution
- extractionextracted with 250 ml of ethyl acetate twice
- dry with materialThe resulting ethyl acetate layer was dried over anhydrous magnesium sulfate
- filtrationfiltered
- concentrationconcentrated under reduced pressure
Sources & evidence
- ORD record
- ord-dd12125ec0074acf87bc2a94b40b9814
- Source dataset
- uspto-grants-2016_08
- Patent number
- US09409952B2
Reaction notes
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