Methyl (6-(4-Methylpiperazin-1-yl)-4-(o-tolyl)pyridin-3-yl)carbaMate → 3-Pyridinamine, N-methyl-4-(2-methylphenyl)-6-(4-methyl-1-piperazinyl)-

HRID 1969171Notes

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+]>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]

Participants

Conditions

Temperature: 0 °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. in CH2Cl2, extracted with ethyl acetate and cooled to 0° C. 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. MS (ISP): 297 (M+H+, 100).

Workup

extractionextracted with ethyl acetate
additionadded over 15 minutes
customThe phases were separated
extractionthe aqueous phase was extracted with ethyl acetate
washThe combined organic extracts were washed with deionized water and brine
dry with materialdried (Na2SO4)
concentrationconcentrated under reduced pressure

Sources & evidence

ORD record: ord-cdeba48cf7a14cfc9057757a5feeeb8b
Source dataset: uspto-grants-2013_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08426450B1

Reaction notes

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