Potassium Iodide → 6-[(2R,6S)-2,6-dimethylmorpholin-4-yl]-7-methyl-3-(1,3-thiazol-2-yl)-1,2-benzoxazole-5-carboxylic acid

HRID 245501Notes

Reaction equation

HRID 245501 reaction equation
C[C:2]1[C:7]([C:8]([OH:10])=[O:9])=[C:6]([N:11]2[CH2:16][C@H:15]([CH3:17])[O:14][C@H:13]([CH3:18])[CH2:12]2)[C:5]([CH3:19])=[C:4](F)[C:3]=1[C:21](=[N:27][OH:28])[C:22]1[S:23][CH:24]=[CH:25][N:26]=1.C([O-])([O-])=O.[K+].[K+].[I-].[K+]>CN(C=O)C>[CH3:18][C@H:13]1[O:14][C@@H:15]([CH3:17])[CH2:16][N:11]([C:6]2[C:7]([C:8]([OH:10])=[O:9])=[CH:2][C:3]3[C:21]([C:22]4[S:23][CH:24]=[CH:25][N:26]=4)=[N:27][O:28][C:4]=3[C:5]=2[CH3:19])[CH2:12]1

Participants

5

Reactant 3

HCID 4875Potassium IodideHCID 11430Potassium CarbonateHCID 136385151methyl 2-[(2R,6S)-2,6-dimethylmorpholin-4-yl]-4-fluoro-5-[(hydroxyimino)(1,3-thiazol-2-yl)methyl]-3-methylbenzoic acid2×

Product 1

HCID 673582146-[(2R,6S)-2,6-dimethylmorpholin-4-yl]-7-methyl-3-(1,3-thiazol-2-yl)-1,2-benzoxazole-5-carboxylic acid

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

A solution of methyl 2-[(2R,6S)-2,6-dimethylmorpholin-4-yl]-4-fluoro-5-[(hydroxyimino)(1,3-thiazol-2-yl)methyl]-3-methylbenzoic acid (Intermediate 195, 0.31 g, 0.8 mmol), K2CO3 (0.4 g, 2.3 mmol) and potassium iodide (0.03 g, 0.2 mmol) in DMF (10 mL) was heated at 130° C. for 12 hours. Solvents were removed under vacuum and the residue was treated with 1.5N hydrochloric acid and extracted with ethyl acetate, which was dried over sodium sulfate. Removal of solvent by vacuum afforded product. Yield: 0.18 g (62%).

Workup

  1. customSolvents were removed under vacuum
  2. additionthe residue was treated with 1.5N hydrochloric acid
  3. extractionextracted with ethyl acetate, which
  4. dry with materialwas dried over sodium sulfate
  5. customRemoval of solvent by vacuum
  6. customafforded product

Sources & evidence

ORD record
ord-7d025a70d40e48148a8165333a10d8dd
Source dataset
uspto-grants-2014_02
Patent number
US08658641B2

Reaction notes

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