Cesium carbonate → 3-[(2,3-Dimethyl-4-oxo-3,4-dihydro-2H-1,3-benzoxazin-7-yl)oxy]-5-{[(1S)-2-hydroxy-1-methylethyl]oxy}-N-(3-methyl-1,2,4-thiadiazol-5-yl)benzamide

HRID 548764Notes

Reaction equation

HRID 548764 reaction equation
C(=O)([O-])[O-].[Cs+].[Cs+].[OH:7][C:8]1[CH:9]=[C:10]([CH:20]=[C:21]([O:23][C@@H:24]([CH3:27])[CH2:25][OH:26])[CH:22]=1)[C:11]([NH:13][C:14]1[S:18][N:17]=[C:16]([CH3:19])[N:15]=1)=[O:12].F[C:29]1[CH:41]=[CH:40][C:32]2[C:33](=[O:39])[N:34]([CH3:38])[CH2:35][CH2:36][O:37][C:31]=2[CH:30]=1>CC(N(C)C)=O>[CH3:35][CH:36]1[N:34]([CH3:38])[C:33](=[O:39])[C:32]2[CH:40]=[CH:41][C:29]([O:7][C:8]3[CH:9]=[C:10]([CH:20]=[C:21]([O:23][C@@H:24]([CH3:27])[CH2:25][OH:26])[CH:22]=3)[C:11]([NH:13][C:14]3[S:18][N:17]=[C:16]([CH3:19])[N:15]=3)=[O:12])=[CH:30][C:31]=2[O:37]1

Participants

5

Reactant 3

HCID 10796Cesium carbonateHCID 576631608-fluoro-4-methyl-3,4-dihydro-1,4-benzoxazepin-5(2H)-oneHCID 591271603-hydroxy-5-{[(1S)-2-hydroxy-1-methylethyl]oxy}-N-(3-methyl-1,2,4-thiadiazol-5-yl)benzamide

Product 1

HCID 159500393-[(2,3-Dimethyl-4-oxo-3,4-dihydro-2H-1,3-benzoxazin-7-yl)oxy]-5-{[(1S)-2-hydroxy-1-methylethyl]oxy}-N-(3-methyl-1,2,4-thiadiazol-5-yl)benzamideYield 64.4%

Reagents, catalysts & solvents 1

HCID 31374DimethylacetamideSolvent

Conditions

Temperature
160 °C

Procedure

Cesium carbonate (489 mg, 1.5 mmol) was added to a solution of 3-hydroxy-5-{[(1S)-2-hydroxy-1-methylethyl]oxy}-N-(3-methyl-1,2,4-thiadiazol-5-yl)benzamide (155 mg, 0.5 mmol) and 8-fluoro-4-methyl-3,4-dihydro-1,4-benzoxazepin-5(2H)-one (117 mg, 0.6 mmol) in DMA (5 mL) and the stirred mixture heated at 160° C. in a microwave reactor for 8 hours. The mixture was cooled to RT and pressure, the DMA removed in vacuo, and the residue partitioned between water (25 mL) and ethyl acetate (30 mL). The mixture was adjusted to pH 2, the organic layer washed with brine, dried (MgSO4) and evaporated in vacuo to a residue which was chromatographed on silica, eluting with ethyl acetate, to give desired compound (156 mg). 1H NMR δ (CDCl3): 1.3 (d, 3H), 1.5 (d, 2H), 2.4 (s, 3H), 3.0 (s, 3H), 3.7 (d, 2H), 4.5 (m, 1H), 5.35 (q, 1H), 6.4 (s, 1H), 6.6 (d, 1H), 6.75 (s, 1H), 7.15 (s, 1H), 7.2 (s, 1H), 7.8 (d, 1H); m/z 485 (M+H)+

Workup

  1. temperatureThe mixture was cooled to RT
  2. custompressure, the DMA removed in vacuo
  3. customthe residue partitioned between water (25 mL) and ethyl acetate (30 mL)
  4. washthe organic layer washed with brine
  5. dry with materialdried (MgSO4)
  6. customevaporated in vacuo to a residue which
  7. customwas chromatographed on silica
  8. washeluting with ethyl acetate

Sources & evidence

ORD record
ord-3d9f88d39d584b38b3dd0aa33e49d68b
Source dataset
uspto-grants-2011_05
Patent number
US07943607B2

Reaction notes

Loading…