Citric Acid → HCID 66731962, compound

HRID 2274377Notes

Reaction equation

[C:1]([NH:5][C:6](=[O:15])[C:7]1[CH:12]=[CH:11][C:10](Br)=[CH:9][C:8]=1[F:14])([CH3:4])([CH3:3])[CH3:2].[NH2:16][C:17]([CH3:22])([CH3:21])[C:18]([OH:20])=[O:19].C([O-])([O-])=O.[K+].[K+].C(C1CCCCC1=O)(=O)C.C(O)(=O)CC(CC(O)=O)(C(O)=O)O>CN(C=O)C.[Cu]I.O>[C:1]([NH:5][C:6]([C:7]1[CH:12]=[CH:11][C:10]([NH:16][C:17]([CH3:22])([CH3:21])[C:18]([OH:20])=[O:19])=[CH:9][C:8]=1[F:14])=[O:15])([CH3:4])([CH3:3])[CH3:2]

Participants

Conditions

Temperature: 100 °C

Procedure

The title compound, made in accordance with General Method 3, may be used to prepare compound 3 in accordance with General Method 1. N-tert-Butyl-4-bromo-2-fluorobenzamide (850 mg, 3.1 mmol), 2-aminoisobutyric acid (450 mg, 4.36 mmol), CuI (100 mg, 0.5 mmol), TEA (0.2 mL) and K2CO3 (1.0 g, 7.2 mmol) were charged in DMF (8 mL) and water (2 mL) and stirred at RT for 5 min. 2-Acetylcyclohexanone (100 mg, 0.7 mmol) was added and the reaction mixture was heated at 100° C. for 18 h. The reaction mixture was acidified with 1 M citric acid (pH 4) and extracted with ethyl acetate (50 mL, 2 times). The combined organic layer was dried over Na2SO4 and concentrated to obtain 1.0 g of 2-(4-(tert-butylcarbamoyl)-3-fluorophenylamino)-2-methylpropanoic acid.

Workup

extractionextracted with ethyl acetate (50 mL, 2 times)
dry with materialThe combined organic layer was dried over Na2SO4
concentrationconcentrated

Sources & evidence

ORD record: ord-d16c8f1e38ce4c4aa35e2c5c22683e2c
Source dataset: uspto-grants-2015_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09126962B2

Reaction notes

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