Triethylamine → HCID 14820794, compound

HRID 1624604Notes

Reaction equation

[O:1]=[C:2]1[CH:7]=[CH:6][N:5]([C:8]2[CH:13]=[CH:12][CH:11]=[C:10]([C:14]([F:17])([F:16])[F:15])[CH:9]=2)[N:4]=[C:3]1C(O)=O.C1C=CC(P([N:35]=[N+]=[N-])(C2C=CC=CC=2)=O)=CC=1.CCN(CC)CC.[OH-].[Na+]>C1(C)C=CC=CC=1.[Cl-].[Na+].O>[NH2:35][C:3]1[C:2](=[O:1])[CH:7]=[CH:6][N:5]([C:8]2[CH:13]=[CH:12][CH:11]=[C:10]([C:14]([F:17])([F:16])[F:15])[CH:9]=2)[N:4]=1

Participants

Conditions

Temperature: 100 °C

Procedure

A mixture of 4-oxo-1-[3-(trifluoromethyl)phenyl]-1,4-dihydropyridazine-3-carboxylic acid (5.00 g, 17.6 mmol), DPPA (5.67 mL, 26.4 mmol) and Et3N (3.65 mL, 26.4 mmol) in toluene (35 mL) was heated to 100° C. for 2 h. To the mixture was added 8 M NaOH aqueous solution (22 mL) at 0° C. The mixture was stirred at room temperature for 2 h, diluted with brine, extracted with EtOAc, dried over Na2SO4, filtered, and concentrated in vacuo. The residue was washed with EtOAc/i-Pr2O and filtered. The filtrate was concentrated in vacuo, purified by column chromatography on basic silica gel (hexane/EtOAc=50/50 to 0/100) and washed with EtOAc/hexane to yield the title compound (2.50 g, 56% yield) as a pale yellow solid: 1H NMR (DMSO-d6, 300 MHz): 8 ppm 6.17 (1H, d, J=7.5 Hz), 6.52 (2H, brs), 7.67-7.81 (2H, m), 8.04 (1H, d, J=7.5 Hz), 8.10 (1H, s), 8.75 (1H, d, J=7.5 Hz).

Workup

extractionextracted with EtOAc
dry with materialdried over Na2SO4
filtrationfiltered
concentrationconcentrated in vacuo
washThe residue was washed with EtOAc/i-Pr2O
filtrationfiltered
concentrationThe filtrate was concentrated in vacuo
custompurified by column chromatography on basic silica gel (hexane/EtOAc=50/50 to 0/100)
washwashed with EtOAc/hexane

Sources & evidence

ORD record: ord-a0d9271d5c1c44759f8c2d79c868f38f
Source dataset: uspto-grants-2014_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08778944B2

Reaction notes

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