Dimethyl Sulfoxide → Methyl 6-(((5-methyl-3-phenylisoxazol-4-yl)methyl)amino)nicotinate

HRID 331887Notes

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]=1NC.Cl[C:16]1[CH:25]=[CH:24][C:19]([C:20]([O:22][CH3:23])=[O:21])=[CH:18][N:17]=1.[CH:26]([N:29](CC)C(C)C)(C)C.CS(C)=O>C(OCC)(=O)C>[CH3:23][O:22][C:20](=[O:21])[C:19]1[CH:24]=[CH:25][C:16]([NH:29][CH2:26][C:3]2[C:4]([C:7]3[CH:8]=[CH:9][CH:10]=[CH:11][CH:12]=3)=[N:5][O:6][C:2]=2[CH3:1])=[N:17][CH:18]=1

Participants

Conditions

Temperature: 160 °C

Procedure

A mixture of (5-methyl-3-phenyl-4-isoxazolyl)-methylamine (200 mg, 1.06 mmol), methyl 6-chloronicotinate (182 mg, 1.06 mmol), N,N-diisopropyl ethyl amine (364 μL, 2.13 mmol) and DMSO (2 mL) was heated in the microwave to 160° C. for 0.5 h. It was diluted with ethyl acetate (8 mL) and washed with aqueous sodium carbonate (saturated, 8 mL), water (8 mL) and brine (8 mL). The combined aqueous layers were extracted with ethyl acetate (10 mL) and the combined organic layers were dried over sodium sulfate. Concentration and purification by chromatography (SiO2, heptane:ethyl acetate=100:0 to 50:50) afforded the title compound (158 mg, 46%) as a light yellow oil. MS: m/e=324.3 [M+H]+.

Workup

washwashed with aqueous sodium carbonate (saturated, 8 mL), water (8 mL) and brine (8 mL)
extractionThe combined aqueous layers were extracted with ethyl acetate (10 mL)
dry with materialthe combined organic layers were dried over sodium sulfate
concentrationConcentration and purification by chromatography (SiO2, heptane:ethyl acetate=100:0 to 50:50)

Sources & evidence

ORD record: ord-9da42129b43e401b86bddb41c49ff500
Source dataset: uspto-grants-2014_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08877782B2

Reaction notes

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