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Ethyl Acetate → 3-Pyridinamine, N-methyl-4-(2-methylphenyl)-6-(4-methyl-1-piperazinyl)-

HRID 380754
Notes
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Reaction equation

HRID 380754 reaction equation
CO[C:3](=O)[NH:4][C:5]1[CH:6]=[N:7][C:8]([N:18]2[CH2:23][CH2:22][N:21]([CH3:24])[CH2:20][CH2:19]2)=[CH:9][C:10]=1[C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][C:12]=1[CH3:17].COCCO[AlH2-]OCCOC.[Na+].[OH-].[Na+].C(OCC)(=O)C>ClCCl.C1(C)C=CC=CC=1>[CH3:3][NH:4][C:5]1[CH:6]=[N:7][C:8]([N:18]2[CH2:23][CH2:22][N:21]([CH3:24])[CH2:20][CH2:19]2)=[CH:9][C:10]=1[C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][C:12]=1[CH3:17]
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

7

Reactant 4

HCID 8857Ethyl AcetateHCID 14798Sodium HydroxideHCID 12167320Methyl (6-(4-Methylpiperazin-1-yl)-4-(o-tolyl)pyridin-3-yl)carbaMateHCID 16684438Red-Al

Product 1

HCID 158874123-Pyridinamine, N-methyl-4-(2-methylphenyl)-6-(4-methyl-1-piperazinyl)-Yield 89.2%

Reagents, catalysts & solvents 2

HCID 1140TolueneSolvent2×
HCID 6344DichloromethaneSolvent

Conditions

Temperature
50 °C

Procedure

A solution of 0.5 g (1.4 mMol) [6-(4-methyl-piperazin-1-yl)-4-o-tolyl-pyridin-3-yl]-carbamic acid methyl ester in 3.0 ml dichloromethane was added over 10 minutes to a solution of 1.98 ml (6.9 mMol ) Red-Al® (70% in toluene) and 2.5 ml toluene (exothermic, cool with a water bath to avoid temperature to go >50° C.). The reaction mixture was stirred 2 hours at 50° C., cooled to 0° C., and 4 ml aqueous NaOH 1N were carefully (exothermic) added over 15 minutes, followed by 20 ml ethyl acetate. The phases were separated and the aqueous phase was extracted with ethyl acetate. The combined organic extracts were washed with deionized water and brine, dried (Na2SO4) and concentrated under reduced pressure to yield 0.37 g (89%) methyl-[6-(4-methyl-piperazin-1-yl)-4-o-tolyl-pyridin-3-yl]-amine as an orange resin.

Workup

  1. temperaturecooled to 0° C.
  2. additionadded over 15 minutes
  3. customThe phases were separated
  4. extractionthe aqueous phase was extracted with ethyl acetate
  5. washThe combined organic extracts were washed with deionized water and brine
  6. dry with materialdried (Na2SO4)
  7. concentrationconcentrated under reduced pressure

Sources & evidence

ORD record
ord-5e223a1c91a34a1a9b3fb8e0add0c8a3
Source dataset
uspto-grants-2001_10
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US06303790B1

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes