Thionyl Chloride → 3-Methyl-isoxazole-4-carboxylic acid [3-(2-oxo-2,3-dihydro-1H-indole-6-carbonyl)-phenyl]-amide

HRID 2352974Notes

Reaction equation

[CH3:1][C:2]1[C:6]([C:7]([OH:9])=O)=[CH:5][O:4][N:3]=1.S(Cl)(Cl)=O.[NH2:14][C:15]1[CH:16]=[C:17]([CH:30]=[CH:31][CH:32]=1)[C:18]([C:20]1[CH:28]=[C:27]2[C:23]([CH2:24][C:25](=[O:29])[NH:26]2)=[CH:22][CH:21]=1)=[O:19]>C1COCC1>[O:29]=[C:25]1[CH2:24][C:23]2[C:27](=[CH:28][C:20]([C:18]([C:17]3[CH:16]=[C:15]([NH:14][C:7]([C:6]4[C:2]([CH3:1])=[N:3][O:4][CH:5]=4)=[O:9])[CH:32]=[CH:31][CH:30]=3)=[O:19])=[CH:21][CH:22]=2)[NH:26]1

Participants

Conditions

Temperature: 79 °C

Procedure

A dry flask was charged with 3-Methyl-isoxazole-4-carboxylic acid (0.500 g, 3.9339 mmol) and thionyl chloride (10 mL) and allowed to stir at 79° C. for 3 h. The thionyl chloride was then removed by concentration in vacuo. The crude acid chloride was cooled to room temperature, and then dissolved in THF (39 mL). 6-(3-Amino-benzoyl)-1,3-dihydro-indol-2-one (as prepared in Example 40, 0.992 g, 3.932 mmol) was added to the THF solution of the acid chloride, and the mixture was allowed to reflux overnight. The reaction mixture was then allowed to cool to room temperature and filtered. The solid residue was washed with 0° C. THF (5 mL) and collected to afford the 3-Methyl-isoxazole-4-carboxylic acid [3-(2-oxo-2,3-dihydro-1H-indole-6-carbonyl)-phenyl]-amide as a solid (0.938 g, 2.60 mmol, 66%).

Workup

customThe thionyl chloride was then removed by concentration in vacuo
temperatureThe crude acid chloride was cooled to room temperature
dissolutiondissolved in THF (39 mL)
temperatureto reflux overnight
temperatureto cool to room temperature
filtrationfiltered
washThe solid residue was washed with 0° C
customTHF (5 mL) and collected

Sources & evidence

ORD record: ord-04ae9b15dd2e4ea89bb354c120d76631
Source dataset: uspto-grants-2010_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07749530B2

Reaction notes

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