Triphenylphosphine → 5-Bromo-2-(5-methyl-3-phenyl-isoxazol-4-ylmethoxy)-pyridine

HRID 332220Notes

Reaction equation

HRID 332220 reaction equation
[CH3:1][C:2]1[O:6][N:5]=[C:4]([C:7]2[CH:12]=[CH:11][CH:10]=[CH:9][CH:8]=2)[C:3]=1[CH2:13][OH:14].O[C:16]1[CH:21]=[CH:20][C:19]([Br:22])=[CH:18][N:17]=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.N(C(OCC)=O)=NC(OCC)=O>C1COCC1>[Br:22][C:19]1[CH:20]=[CH:21][C:16]([O:14][CH2:13][C:3]2[C:4]([C:7]3[CH:12]=[CH:11][CH:10]=[CH:9][CH:8]=3)=[N:5][O:6][C:2]=2[CH3:1])=[N:17][CH:18]=1

Participants

6

Reactant 4

HCID 11776TriphenylphosphineHCID 220568ethyl N-ethoxycarbonyliminocarbamateHCID 2776149(5-Methyl-3-phenyl-1,2-oxazol-4-yl)methanolHCID 178515818HCID 178515818, compound

Product 1

HCID 684448075-Bromo-2-(5-methyl-3-phenyl-isoxazol-4-ylmethoxy)-pyridineYield 42%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a solution of (5-methyl-3-phenyl-isoxazol-4-yl)-methanol (189 mg, 1.0 mmol) in THF (12 mL) was added 2-hydroxy-5-bromopyridine (191 mg, 1.1 mmol) and triphenylphosphine (393 mg, 1.5 mmol) at ambient temperature under an argon atmosphere. Then diethyl azodicarboxylate (233 μL, 1.5 mmol) was added and the reaction mixture was stirred for 3 h at room temperature. Concentration and purification by chromatography (SiO2, heptane:ethyl acetate=100:0 to 1:1) afforded the title compound (144 mg, 42%) as a colourless gum. MS: m/e=345.0/347.1 [M+H]+.

Workup

  1. concentrationConcentration and purification by chromatography (SiO2, heptane:ethyl acetate=100:0 to 1:1)

Sources & evidence

ORD record
ord-1668015e88ec4befaf4e90e22a429e87
Source dataset
uspto-grants-2014_11
Patent number
US08877783B2

Reaction notes

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