Triphenylphosphine → 6-(3-Phenyl-5-trifluoromethyl-isoxazol-4-ylmethoxy)-nicotinic acid methyl ester

HRID 83252Notes

Reaction equation

[C:1]1([C:7]2[C:11]([CH2:12][OH:13])=[C:10]([C:14]([F:17])([F:16])[F:15])[O:9][N:8]=2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[CH3:18][O:19][C:20](=[O:28])[C:21]1[CH:26]=[CH:25][C:24](O)=[N:23][CH:22]=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.N(C(OCC)=O)=NC(OCC)=O>C1COCC1>[CH3:18][O:19][C:20](=[O:28])[C:21]1[CH:26]=[CH:25][C:24]([O:13][CH2:12][C:11]2[C:7]([C:1]3[CH:2]=[CH:3][CH:4]=[CH:5][CH:6]=3)=[N:8][O:9][C:10]=2[C:14]([F:16])([F:17])[F:15])=[N:23][CH:22]=1

Participants

Conditions

Temperature: 50 °C

Procedure

To a solution of (3-phenyl-5-trifluoromethyl-isoxazol-4-yl)-methanol (100 mg, 0.41 mmol) in THF (5 mL) was added 6-hydroxy-nicotinic acid methyl ester (69.3 mg, 0.45 mmol) and triphenylphosphine (162 mg, 0.62 mmol) at ambient temperature under an argon atmosphere. Then diethyl azodicarboxylate (96 μL, 0.62 mmol) was added and the reaction mixture was heated at 50° C. for 2 h. After cooling to room temperature the mixture was evaporated. Purification by chromatography (SiO2, heptane:ethyl acetate=100:0 to 1:1) afforded the title compound (66 mg, 42%) as all off-whit solid. MS: m/e=379.5 [M+H]+.

Workup

temperatureAfter cooling to room temperature the mixture
customwas evaporated
customPurification by chromatography (SiO2, heptane:ethyl acetate=100:0 to 1:1)

Sources & evidence

ORD record: ord-8917978700054eb6a3e44d0dbc3262c9
Source dataset: uspto-grants-2014_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08846719B2

Reaction notes

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