Diisopropylethylamine → 6-{[3-(4-Fluoro-phenyl)-5-methyl-isoxazol-4-ylmethyl]-amino}-nicotinic acid methyl ester

HRID 332402Notes

Reaction equation

[F:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[C:12]([CH2:13][NH2:14])=[C:11]([CH3:15])[O:10][N:9]=2)=[CH:4][CH:3]=1.Cl[C:17]1[CH:26]=[CH:25][C:20]([C:21]([O:23][CH3:24])=[O:22])=[CH:19][N:18]=1.C(N(CC)C(C)C)(C)C>CS(C)=O>[CH3:24][O:23][C:21](=[O:22])[C:20]1[CH:25]=[CH:26][C:17]([NH:14][CH2:13][C:12]2[C:8]([C:5]3[CH:4]=[CH:3][C:2]([F:1])=[CH:7][CH:6]=3)=[N:9][O:10][C:11]=2[CH3:15])=[N:18][CH:19]=1

Participants

Conditions

Temperature: 160 °C

Procedure

A mixture of C-[3-(4-fluoro-phenyl)-5-methyl-isoxazol-4-yl]-methylamine (620 mg, 3.0 mmol), methyl 6-chloronicotinate (516 mg, 3.0 mmol), N,N-diisopropyl ethyl amine (1.0 mL, 6.0 mmol) and DMSO (6 mL) was heated in the microwave to 160° C. for 2 h. The mixture was then diluted with ice-water and extracted with ethyl acetate. The combined organic extracts were then washed with brine and dried over sodium sulfate. Concentration and purification by chromatography (SiO2, heptane:ethyl acetate=100:0 to 1:1 then dichloromethane:methanol 97:3) afforded the title compound (335 mg, 33%) as a white foam. MS: m/e=342.1 [M+H]+.

Workup

extractionextracted with ethyl acetate
washThe combined organic extracts were then washed with brine
dry with materialdried over sodium sulfate
concentrationConcentration and purification by chromatography (SiO2, heptane

Sources & evidence

ORD record: ord-943fbe3771b54ef28c336c89693af664
Source dataset: uspto-grants-2014_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08877783B2

Reaction notes

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