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

HRID 1521156Notes

Reaction equation

[F:1][C:2]1[CH:3]=[C:4]([C:8]2[C:12]([CH2:13][NH2:14])=[C:11]([CH3:15])[O:10][N:9]=2)[CH:5]=[CH:6][CH:7]=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:4]3[CH:5]=[CH:6][CH:7]=[C:2]([F:1])[CH:3]=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-(3-fluoro-phenyl)-5-methyl-isoxazol-4-yl]-methylamine (530 mg, 2.6 mmol), methyl 6-chloronicotinate (440 mg, 2.6 mmol), N,N-diisopropyl ethyl amine (880 μL, 5.1 mmol) and DMSO (5.1 mL) was heated in the microwave to 160° C. for 2×0.5 h and 1 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) afforded the title compound (335 mg, 38%) as a yellow gum. 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:ethyl acetate=100:0 to 1:1)

Sources & evidence

ORD record: ord-894ba95377194a7587021f00ce696c0f
Source dataset: uspto-grants-2015_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09073908B2

Reaction notes

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