Acetic Acid → Cyclobutyl 5-cyano-4-(5,6-difluoro-2-methyl-4-oxo-4H-chromen-8-yl)-2,6-dimethyl-1,4-dihydropyridine-3-carboxylate

HRID 557409Notes

Reaction equation

HRID 557409 reaction equation
[F:1][C:2]1[C:11]([F:12])=[CH:10][C:9]([CH:13]=O)=[C:8]2[C:3]=1[C:4](=[O:16])[CH:5]=[C:6]([CH3:15])[O:7]2.[C:17]([CH:19]=[C:20]([O-])[CH3:21])#[N:18].[Na+].[NH2:24]/[C:25](/[CH3:34])=[CH:26]\[C:27]([O:29][CH:30]1[CH2:33][CH2:32][CH2:31]1)=[O:28].C(O)(=O)C>CC(O)C>[C:17]([C:19]1[CH:13]([C:9]2[CH:10]=[C:11]([F:12])[C:2]([F:1])=[C:3]3[C:8]=2[O:7][C:6]([CH3:15])=[CH:5][C:4]3=[O:16])[C:26]([C:27]([O:29][CH:30]2[CH2:33][CH2:32][CH2:31]2)=[O:28])=[C:25]([CH3:34])[NH:24][C:20]=1[CH3:21])#[N:18]

Participants

6

Reactant 4

HCID 176Acetic AcidHCID 574388895,6-difluoro-2-methyl-4-oxo-4H-chromene-8-carbaldehydeHCID 57475512Cyclobutyl 3-aminocrotonateHCID 74083625Sodium 1-cyanoprop-1-en-2-olate

Product 1

HCID 15979223Cyclobutyl 5-cyano-4-(5,6-difluoro-2-methyl-4-oxo-4H-chromen-8-yl)-2,6-dimethyl-1,4-dihydropyridine-3-carboxylate

Reagents, catalysts & solvents 1

HCID 3776IsopropanolSolvent

Procedure

A solution of 100 mg (0.45 mmol) of 5,6-difluoro-2-methyl-4-oxo-4H-chromene-8-carbaldehyde in 5 ml of 2-propanol is mixed with 46.9 mg (0.45 mmol) of sodium 1-cyanoprop-1-en-2-olate, 69.23 mg (0.45 mmol) of cyclobutyl 3-aminocrotonate and 0.04 ml (0.67 mmol) of acetic acid and stirred under reflux for 3 h. After cooling, the mixture is concentrated. The residue is taken up in dichloromethane and washed with water. The organic phase is dried over sodium sulfate and concentrated. The resulting residue is crystallized from diethyl ether. The yellow crystals are filtered off with suction and dried in a vacuum drying oven at 40° C. 104.4 mg (54.9% of theory) of the title compound are obtained.

Workup

  1. temperatureunder reflux for 3 h
  2. temperatureAfter cooling
  3. concentrationthe mixture is concentrated
  4. washwashed with water
  5. dry with materialThe organic phase is dried over sodium sulfate
  6. concentrationconcentrated
  7. customThe resulting residue is crystallized from diethyl ether
  8. filtrationThe yellow crystals are filtered off with suction
  9. customdried in a vacuum
  10. customdrying oven at 40° C

Sources & evidence

ORD record
ord-f2d1f9b5980e4bd8bec9987d316855bd
Source dataset
uspto-grants-2011_11
Patent number
US08058447B2

Reaction notes

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