Potassium Carbonate → Methyl 7-(4-carbamoylphenoxy)-6-cyanochroman-4-carboxylate

HRID 1626383Notes

Reaction equation

[C:1]([C:3]1[CH:4]=[C:5]2[C:10](=[CH:11][C:12]=1F)[O:9][CH2:8][CH2:7][CH:6]2[C:14]([O:16][CH3:17])=[O:15])#[N:2].[OH:18][C:19]1[CH:27]=[CH:26][C:22]([C:23]([NH2:25])=[O:24])=[CH:21][CH:20]=1.C(=O)([O-])[O-].[K+].[K+]>CN1C(=O)CCC1>[C:23]([C:22]1[CH:26]=[CH:27][C:19]([O:18][C:12]2[CH:11]=[C:10]3[C:5]([CH:6]([C:14]([O:16][CH3:17])=[O:15])[CH2:7][CH2:8][O:9]3)=[CH:4][C:3]=2[C:1]#[N:2])=[CH:20][CH:21]=1)(=[O:24])[NH2:25]

Participants

Conditions

Temperature: 110 °C

Procedure

Methyl 6-cyano-7-fluorochroman-4-carboxylate (300 mg, 1.28 mmol), 4-hydroxybenzamide (227 mg, 1.66 mmol) and potassium carbonate (423 mg, 3.06 mmol) were diluted with dry NMP (4 mL). The reaction was bubbled with argon for 10 minutes and then heated at 110° C. for 12 hours. The reaction was cooled and loaded directly onto a biotage 40M cartridge (silica gel), eluting with 5% ethyl acetate/hexanes to 100% ethyl acetate to yield methyl 7-(4-carbamoylphenoxy)-6-cyanochroman-4-carboxylate (100 mg, 22.3% yield).

Workup

customThe reaction was bubbled with argon for 10 minutes
temperatureThe reaction was cooled
washeluting with 5% ethyl acetate/hexanes to 100% ethyl acetate

Sources & evidence

ORD record: ord-60920c21c31b4508809d18b0c1b05bc0
Source dataset: uspto-grants-2014_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08785445B2

Reaction notes

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