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

HRID 332352Notes

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-0d4efff7064f47fd83ad12139c46b164
Source dataset: uspto-grants-2014_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08877783B2

Reaction notes

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