Hydroxyamine hydrochloride → HCID 86658093, compound

HRID 577904Notes

Reaction equation

HRID 577904 reaction equation
[Si:1]([O:18][CH2:19][C:20]1[C:21]([N:35]2[CH2:40][C@H:39]([CH3:41])[O:38][C@H:37]([CH3:42])[CH2:36]2)=[C:22]([F:34])[C:23]([F:33])=[C:24]([C:26](=O)[C:27]([O:29][CH2:30][CH3:31])=[O:28])[CH:25]=1)([C:14]([CH3:17])([CH3:16])[CH3:15])([C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.Cl.[NH2:44][OH:45]>N1C=CC=CC=1>[Si:1]([O:18][CH2:19][C:20]1[C:21]([N:35]2[CH2:36][C@H:37]([CH3:42])[O:38][C@H:39]([CH3:41])[CH2:40]2)=[C:22]([F:34])[C:23]([F:33])=[C:24]([C:26](=[N:44][OH:45])[C:27]([O:29][CH2:30][CH3:31])=[O:28])[CH:25]=1)([C:14]([CH3:15])([CH3:16])[CH3:17])([C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

4

Reactant 2

HCID 443297Hydroxyamine hydrochlorideHCID 86658065Ethyl 2-(5-((tert-butyldiphenylsilyloxy)methyl)-4-((2R,6S)-2,6-dimethylmorpholino)-2,3-difluorophenyl)-2-oxoacetate2×

Product 1

HCID 86658093HCID 86658093, compound

Reagents, catalysts & solvents 1

HCID 1049PyridineSolvent

Conditions

Temperature
115 °C

Procedure

Ethyl 2-(5-((tert-butyldiphenylsilyloxy)methyl)-4-((2R,6S)-2,6-dimethylmorpholino)-2,3-difluorophenyl)-2-oxoacetate (Intermediate 114, 2.808 g, 4.71 mmol) and hydroxylamine hydrochloride (0.360 g, 5.18 mmol) were dissolved in pyridine (40 ml) and stirred at 115° C. for 16 hours. The reaction was concentrated to remove excess pyridine. The residue was dissolved in ethyl acetate and washed with water and brine 3×. The organic layer was dried over MgSO4 and concentrated. The residue was purified by silica gel column chromatography using a gradient of hexanes to ethyl acetate to give the title compound as a mixture of oxime isomers (1.924 g, 3.15 mmol, 66.8%).

Workup

  1. concentrationThe reaction was concentrated
  2. customto remove excess pyridine
  3. dissolutionThe residue was dissolved in ethyl acetate
  4. washwashed with water and brine 3×
  5. dry with materialThe organic layer was dried over MgSO4
  6. concentrationconcentrated
  7. customThe residue was purified by silica gel column chromatography

Sources & evidence

ORD record
ord-1ef981f6283f4f9eba78355e90d7ce2b
Source dataset
uspto-grants-2015_05
Patent number
US09040528B2

Reaction notes

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