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Dimethylformamide → Methanol trifluoroacetic acid

HRID 1506462
Notes
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Reaction equation

HRID 1506462 reaction equation
BrCC1C=C2C(=CC=1)C1=N[O:11][C:12](C3C([C:18]([F:21])([F:20])[F:19])=C(C4C=CC=CC=4)ON=3)=C1CC2.N1CC[O:34]CC1CO.C(N(CC)CC)C.CN([CH:49]=[O:50])C>C(OCC)(=O)C>[OH:34][C:49]([C:18]([F:21])([F:20])[F:19])=[O:50].[CH3:12][OH:11]
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

6

Reactant 4

HCID 6228DimethylformamideHCID 8471TriethylamineHCID 5058360(Morpholin-3-yl)methanolHCID 671678437-(Bromomethyl)-3-(5-phenyl-4-(trifluoromethyl)isoxazol-3-yl)-4,5-dihydronaphtho[1,2-c]isoxazole

Product 1

HCID 86669916Methanol trifluoroacetic acidYield 50%

Reagents, catalysts & solvents 1

HCID 8857
Ethyl Acetate
Solvent

Procedure

A mixture of 7-(bromomethyl)-3-(5-phenyl-4-(trifluoromethyl)isoxazol-3-yl)-4,5-dihydronaphtho[1,2-c]isoxazole (6C, 0.025 g, 0.053 mmol), morpholin-3-ylmethanol (6.16 mg, 0.053 mmol) and triethylamine (7.33 mL, 0.053 mmol) in DMF (3.0 mL) was stirred at room temperature overnight. The reaction mixture was diluted with ethyl acetate (15 mL) and washed with water (3×1.0 mL). The ethyl acetate extract was concentrated, and the residue was chromatographed using reverse-phase preparative HPLC (Column: LUNA 5 u C18, 21×100 mm:Solvent MeOH(B)—H2O(A), 0.1% TFA: 0% B-100% B, Gradient Time 12 min, Stop Time 20 min, Flow Rate 20 ml/min, Wavelength 220 Nm) to give 4-((3-(5-phenyl-4-(trifluoromethyl)isoxazol-3-yl)-4,5-dihydronaphtho[1,2-c]isoxazol-7-yl)methyl)morpholino-3-yl)methanol TFA [0.013 g, 0.500 mmol, 50%] as a viscous tan film. The product had an HPLC ret. time=4.02 min. (condition B). LC/MS M+1=512.1. 1H NMR (400 MHz, CD3OD) δ ppm 7.97-8.14 (1H, m), 7.78 (2H, d, J=7.48 Hz), 7.44-7.73 (5H, m), 4.20 (2H, br. s.), 3.76 (6H, br. s.), and 2.96-3.25 (7H, m).

Workup

  1. washwashed with water (3×1.0 mL)
  2. extractionThe ethyl acetate extract
  3. concentrationwas concentrated
  4. customthe residue was chromatographed
  5. customreverse-phase preparative HPLC (Column: LUNA 5 u C18, 21×100 mm:Solvent MeOH(B)—H2O(A), 0.1% TFA: 0% B-100% B, Gradient Time 12 min, Stop Time 20 min, Flow Rate 20 ml/min, Wavelength 220 Nm)

Sources & evidence

ORD record
ord-20eb7c2d0d0d4d18be761b6abecce1a9
Source dataset
uspto-grants-2015_12
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US09216972B2

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes