Sodium periodate → 2-(3-Phenyl-4-(trifluoromethyl)isoxazol-5-yl)-4,5-dihydronaphtho[2,1-d]thiazole-7-carbaldehyde

HRID 1506421Notes

Reaction equation

HRID 1506421 reaction equation
[C:1]1([C:7]2[C:11]([C:12]([F:15])([F:14])[F:13])=[C:10]([C:16]3[S:17][C:18]4[C:28]5[C:23](=[CH:24][C:25]([CH:29]=C)=[CH:26][CH:27]=5)[CH2:22][CH2:21][C:19]=4[N:20]=3)[O:9][N:8]=2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.I([O-])(=O)(=O)=[O:32].[Na+]>C1COCC1.C(O)CCC.O.[Os](=O)(=O)(=O)=O>[C:1]1([C:7]2[C:11]([C:12]([F:15])([F:14])[F:13])=[C:10]([C:16]3[S:17][C:18]4[C:28]5[C:23](=[CH:24][C:25]([CH:29]=[O:32])=[CH:26][CH:27]=5)[CH2:22][CH2:21][C:19]=4[N:20]=3)[O:9][N:8]=2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1

Participants

7

Reactant 2

HCID 23667635Sodium periodateHCID 671705843-Phenyl-4-(trifluoromethyl)-5-(7-vinyl-4,5-dihydronaphtho[2,1-d]thiazol-2-yl)isoxazole

Product 1

HCID 866699012-(3-Phenyl-4-(trifluoromethyl)isoxazol-5-yl)-4,5-dihydronaphtho[2,1-d]thiazole-7-carbaldehyde

Reagents, catalysts & solvents 4

HCID 30318Osmium TetroxideCatalystHCID 2631-ButanolSolventHCID 962WaterSolventHCID 8028TetrahydrofuranSolvent

Procedure

To a solution of 3-phenyl-4-(trifluoromethyl)-5-(7-vinyl-4,5-dihydronaphtho[2,1-d]thiazol-2-yl)isoxazole (Preparation 56E, 0.350 g, 0.825 mmol) in THF (7.5 ml) at room temperature, was added a solution of osmium tetroxide, (2.5% in butanol, 1.7 ml, 0.017 mmol) followed by sodium periodate (0.265 g, 1.238 mmol) as a solution in 7.5 ml of water. After stirring for 90 min it was quenched with a saturated solution of sodium bisulfate. The dark colored suspension was filtered through Celite. The filter cake was washed with EtOAc. The combined EtOAc layers were washed with water, dried over anhydrous MgSO4, concentrated, and chromatographed to yield the 2-(3-phenyl-4-(trifluoromethyl)isoxazol-5-yl)-4,5-dihydronaphtho[2,1-d]thiazole-7-carbaldehyde as an orange colored solid. The product had an LC ret. time=3.136 min. (condition: Start % B=50, Final % B=100, Gradient Time=4 min, Flow Rate=4 ml/min, Wavelength=220, Solvent Pair=MeOH−H2O−TFA; Solvent A=10% MeOH−90% H2O−0.1% TFA; Solvent B=90% MeOH−10% H2O−0.1% TFA; Column 1=1: Waters Sunfire C18 4.6×50 mm (4 min. grad)); LC/MS M+1=427.03.

Workup

  1. customwas quenched with a saturated solution of sodium bisulfate
  2. filtrationThe dark colored suspension was filtered through Celite
  3. washThe filter cake was washed with EtOAc
  4. washThe combined EtOAc layers were washed with water
  5. dry with materialdried over anhydrous MgSO4
  6. concentrationconcentrated
  7. customchromatographed

Sources & evidence

ORD record
ord-9cd1dd5d45154c3c976106477501da0d
Source dataset
uspto-grants-2015_12
Patent number
US09216972B2

Reaction notes

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