Dichloromethane → N-tert-butyl-4-[3-{3-[(diphenylmethylidene)amino]phenyl}-1-(4-methoxybenzyl)-1H-pyrazol-4-yl]pyridin-2-amine

HRID 1843625Notes

Reaction equation

HRID 1843625 reaction equation
[C:1]1([C:7]([C:36]2[CH:41]=[CH:40][CH:39]=[CH:38][CH:37]=2)=[N:8][C:9]2[CH:14]=[CH:13][CH:12]=[C:11]([C:15]3[C:19]([C:20]4[CH:25]=[CH:24][N+:23]([O-])=[CH:22][CH:21]=4)=[CH:18][N:17]([CH2:27][C:28]4[CH:33]=[CH:32][C:31]([O:34][CH3:35])=[CH:30][CH:29]=4)[N:16]=3)[CH:10]=2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[C:42]([NH2:46])([CH3:45])([CH3:44])[CH3:43].C1(C)C=CC(S(OS(C2C=CC(C)=CC=2)(=O)=O)(=O)=O)=CC=1.ClCCl>FC(C1C=CC=CC=1)(F)F>[C:42]([NH:46][C:24]1[CH:25]=[C:20]([C:19]2[C:15]([C:11]3[CH:12]=[CH:13][CH:14]=[C:9]([N:8]=[C:7]([C:36]4[CH:41]=[CH:40][CH:39]=[CH:38][CH:37]=4)[C:1]4[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=4)[CH:10]=3)=[N:16][N:17]([CH2:27][C:28]3[CH:33]=[CH:32][C:31]([O:34][CH3:35])=[CH:30][CH:29]=3)[CH:18]=2)[CH:21]=[CH:22][N:23]=1)([CH3:45])([CH3:44])[CH3:43]

Participants

6

Reactant 4

HCID 6344DichloromethaneHCID 6385Tert-ButylamineHCID 77773Toluene-p-sulphonic anhydrideHCID 86654335N-(diphenylmethylidene)-3-[1-(4-methoxybenzyl)-4-(1-oxidopyridin-4-yl)-1H-pyrazol-3-yl]aniline

Product 1

HCID 86654336N-tert-butyl-4-[3-{3-[(diphenylmethylidene)amino]phenyl}-1-(4-methoxybenzyl)-1H-pyrazol-4-yl]pyridin-2-amineYield 73%

Reagents, catalysts & solvents 1

HCID 7368(Trifluoromethyl)benzeneSolvent

Procedure

200 mg (0.4 mmol) of N-(diphenylmethylidene)-3-[1-(4-methoxybenzyl)-4-(1-oxidopyridin-4-yl)-1H-pyrazol-3-yl]aniline were suspended in 50 ml of trifluoromethylbenzene and 210 μl (2 mmol) of tert-butylamine were added under stirring at room temperature. The mixture was cooled to 0° C. and 260 mg (0.8 mmol) of p-toluensulfonic anhydride were added. The reaction was maintained in the same conditions for 2.5 hours. Then the same amounts of reactants and 2 ml of dichloromethane to obtain a clear solution were added and after further 2 hours the reaction went to completion. The solvent was evaporated and the residue taken up in dichloromethane and washed with water. The organic phase was dried over Na2SO4 and evaporated to dryness, giving 161 mg (73% yield) of the title compound.

Workup

  1. temperatureThe mixture was cooled to 0° C.
  2. temperatureThe reaction was maintained in the same conditions for 2.5 hours
  3. additionwere added and after further 2 hours the reaction
  4. customThe solvent was evaporated
  5. washwashed with water
  6. dry with materialThe organic phase was dried over Na2SO4
  7. customevaporated to dryness

Sources & evidence

ORD record
ord-a7573994632143cf803cd01b00abd61b
Source dataset
uspto-grants-2015_02
Patent number
US08946250B2

Reaction notes

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