Pyrrolidine → Sunitinib acid

HRID 2245261Notes

Reaction equation

HRID 2245261 reaction equation
[F:1][C:2]1[CH:3]=[C:4]2[C:8](=[CH:9][CH:10]=1)[NH:7][C:6](=[O:11])[CH2:5]2.[CH:12]([C:14]1[NH:18][C:17]([CH3:19])=[C:16]([C:20]([OH:22])=[O:21])[C:15]=1[CH3:23])=O.N1CCCC1>C(O)C>[F:1][C:2]1[CH:3]=[C:4]2[C:8](=[CH:9][CH:10]=1)[NH:7][C:6](=[O:11])/[C:5]/2=[CH:12]\[C:14]1[NH:18][C:17]([CH3:19])=[C:16]([C:20]([OH:22])=[O:21])[C:15]=1[CH3:23]

Participants

5

Reactant 3

HCID 31268PyrrolidineHCID 37310125-fluoro-1,3-dihydro-2H-indol-2-oneHCID 110737925-formyl-2,4-dimethyl-1H-pyrrole-3-carboxylic Acid

Product 1

HCID 10979489Sunitinib acidYield 93.3%

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Procedure

A mixture of 5-fluoro-1,3-dihydroindol-2-one (A2) (20 g, 132 mmol), 5-formyl-2,4-dimethylpyrrole-3-carboxylic acid (A1) (21.1 g, 126 mmol), pyrrolidine (5 ml) and absolute ethanol (400 mL) were heated to reflux for 3 hours. Then the mixture was cooled to room temperature and the solid was collected by filtration, washed with ethanol (100 mL). The solid was stirred in ethanol (350 ml) at reflux for 0.5 h again. The mixture was cooled to room temperature and the solid was collected by filtration, washed with ethanol (100 ml) and dried under vacuum overnight to give (Z)-5-((5-fluoro-2-oxoindolin-3-ylidene)methyl)-2,4-dimethyl-1H-pyrrole-3-carboxylic acid (A3) (35.3 g, 93%) as orange solid. LC-MS observed [M−H]+: 299.2.

Workup

  1. temperaturewere heated
  2. temperatureto reflux for 3 hours
  3. filtrationthe solid was collected by filtration
  4. washwashed with ethanol (100 mL)
  5. temperatureat reflux for 0.5 h again
  6. temperatureThe mixture was cooled to room temperature
  7. filtrationthe solid was collected by filtration
  8. washwashed with ethanol (100 ml)
  9. customdried under vacuum overnight

Sources & evidence

ORD record
ord-76579060de0c44d68c64d7d52e449ab6
Source dataset
uspto-grants-2010_03
Patent number
US07683057B2

Reaction notes

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