2,2,3,3-Tetrafluoro-1-propanol → 2-(1-Methyl-3-trifluoromethylpyrazol-5-yloxy)-4-methoxy-6-(2,2,3,3-tetrafluoropropyloxy)pyridine

HRID 23321

Reaction equation

[F:1][C:2]([F:8])([CH:5]([F:7])[F:6])[CH2:3][OH:4].[H-].[Na+].[CH3:11][N:12]1[C:16]([O:17][C:18]2[CH:23]=[C:22]([O:24][CH3:25])[CH:21]=[C:20](OC3N(C)N=C(C(F)(F)F)C=3)[N:19]=2)=[CH:15][C:14]([C:37]([F:40])([F:39])[F:38])=[N:13]1>S1(CCCC1)(=O)=O.CCCCC.C(OCC)(=O)C>[CH3:11][N:12]1[C:16]([O:17][C:18]2[CH:23]=[C:22]([O:24][CH3:25])[CH:21]=[C:20]([O:4][CH2:3][C:2]([F:8])([F:1])[CH:5]([F:7])[F:6])[N:19]=2)=[CH:15][C:14]([C:37]([F:40])([F:39])[F:38])=[N:13]1

Participants

Conditions

Temperature: 110 °C

Procedure

To a mixture of 2,2,3,3-tetrafluoropropan-1-ol (0.29 g, 2.2 mmol) in dry sulfolane (2 ml) is added NaH (60% in oil, 0.09 g, 2.2 mmol) and 2,6-bis-(1-methyl-3-trifluoromethylpyrazol-5-yloxy)-4-methoxypyridine (0.8 g, 1.8 mmol). After stirring at 110° C. for 3.7 h the mixture is cooled to ambient temperature. The resulting mixture is diluted with pentane/ethyl acetate (by volume ration 1/1) and filtered through a bed of silica gel. The filtrate is washed 10 times with water. The organic layer is dried with anhydrous magnesium sulfate, filtered and evaporated in vacuo. Purification by flash chromatography (silica gel: pentane/ethyl acetate 9/1 v/v) yields the title compound (0.72 g, 57% yield) of m.p. 73-74° C.

Workup

temperatureis cooled to ambient temperature
filtrationfiltered through a bed of silica gel
washThe filtrate is washed 10 times with water
dry with materialThe organic layer is dried with anhydrous magnesium sulfate
filtrationfiltered
customevaporated in vacuo
customPurification by flash chromatography (silica gel: pentane/ethyl acetate 9/1 v/v)

Sources & evidence

ORD record: ord-facc9139d28f472d8d74f9b9d1df1032
Source dataset: uspto-grants-2005_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06852673B2

Linked notes

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