Potassium Carbonate → 2-methylpropan-2-yl 4-[4-(6-cyanopyridin-3-yl)-9H-carbazol-9-yl]-2-[(1,2,2,6,6-pentamethylpiperidin-4-yl)amino]benzoate

HRID 1877513Notes

Reaction equation

HRID 1877513 reaction equation
C(=O)([O-])[O-].[K+].[K+].[NH2:7][CH:8]1[CH2:13][C:12]([CH3:15])([CH3:14])[N:11]([CH3:16])[C:10]([CH3:18])([CH3:17])[CH2:9]1.[C:19]([C:21]1[N:26]=[CH:25][C:24]([C:27]2[C:39]3[C:38]4[C:33](=[CH:34][CH:35]=[CH:36][CH:37]=4)[N:32]([C:40]4[CH:52]=[CH:51][C:43]([C:44]([O:46][C:47]([CH3:50])([CH3:49])[CH3:48])=[O:45])=[C:42](F)[CH:41]=4)[C:31]=3[CH:30]=[CH:29][CH:28]=2)=[CH:23][CH:22]=1)#[N:20]>CS(C)=O.O>[C:19]([C:21]1[N:26]=[CH:25][C:24]([C:27]2[C:39]3[C:38]4[C:33](=[CH:34][CH:35]=[CH:36][CH:37]=4)[N:32]([C:40]4[CH:41]=[CH:42][C:43]([C:44]([O:46][C:47]([CH3:48])([CH3:49])[CH3:50])=[O:45])=[C:51]([NH:7][CH:8]5[CH2:9][C:10]([CH3:18])([CH3:17])[N:11]([CH3:16])[C:12]([CH3:14])([CH3:15])[CH2:13]5)[CH:52]=4)[C:31]=3[CH:30]=[CH:29][CH:28]=2)=[CH:23][CH:22]=1)#[N:20]

Participants

6

Reactant 3

HCID 11430Potassium CarbonateHCID 6937924-Amino-1,2,2,6,6-pentamethylpiperidineHCID 583382932-methylpropan-2-yl 4-[4-(6-cyanopyridin-3-yl)-9H-carbazol-9-yl]-2-fluorobenzoate

Product 1

HCID 673086552-methylpropan-2-yl 4-[4-(6-cyanopyridin-3-yl)-9H-carbazol-9-yl]-2-[(1,2,2,6,6-pentamethylpiperidin-4-yl)amino]benzoate

Reagents, catalysts & solvents 2

HCID 679Dimethyl SulfoxideSolventHCID 962WaterSolvent

Conditions

Temperature
90 °C

Procedure

0.95 g of potassium carbonate and 7.8 ml of 4-amino-1,2,2,6,6-pentamethylpiperidine are successively added to a solution of 1.06 g of 2-methylpropan-2-yl 4-[4-(6-cyanopyridin-3-yl)-9H-carbazol-9-yl]-2-fluorobenzoate, obtained in stage 1 of Example 49, in 8 ml of dimethyl sulphoxide. The reaction mixture is heated at 90° C. for 2 hours and 15 minutes in a microwave, and then diluted with distilled water. The aqueous phase is extracted twice with ethyl acetate and the combined organic phases are washed with water and a saturated solution of sodium chloride and dried over magnesium sulphate. The residue is purified by silica gel chromatography, elution being carried out with a mixture of dichloromethane and methanol (97/3 by volume), so as to give 0.8 g of 2-methylpropan-2-yl 4-[4-(6-cyanopyridin-3-yl)-9H-carbazol-9-yl]-2-[(1,2,2,6,6-pentamethylpiperidin-4-yl)amino]benzoate in the form of a yellow oil, the characteristics of which are the following:

Workup

  1. extractionThe aqueous phase is extracted twice with ethyl acetate
  2. washthe combined organic phases are washed with water
  3. dry with materiala saturated solution of sodium chloride and dried over magnesium sulphate
  4. customThe residue is purified by silica gel chromatography, elution
  5. additionbeing carried out with a mixture of dichloromethane and methanol (97/3 by volume)

Sources & evidence

ORD record
ord-947577887d5b4af7bf71e18c91399255
Source dataset
uspto-grants-2012_11
Patent number
US08309721B2

Reaction notes

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