Ethanol → N-(2,4-dimethoxybenzyl)-1-(2',5-dimethyl-3,4'-bipyridin-6-yl)methanamine

HRID 711273Notes

Reaction equation

Br[C:2]1[CH:3]=[C:4]([CH3:21])[C:5]([CH2:8][NH:9][CH2:10][C:11]2[CH:16]=[CH:15][C:14]([O:17][CH3:18])=[CH:13][C:12]=2[O:19][CH3:20])=[N:6][CH:7]=1.FC1C=C(CN)C=CC=1[C:29]1[CH:34]=[CH:33][N:32]=[C:31]([CH3:35])[CH:30]=1.C([O-])([O-])=O.[Na+].[Na+].C(O)C>C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1.C(OCC)(=O)C.C1(C)C=CC=CC=1>[CH3:20][O:19][C:12]1[CH:13]=[C:14]([O:17][CH3:18])[CH:15]=[CH:16][C:11]=1[CH2:10][NH:9][CH2:8][C:5]1[N:6]=[CH:7][C:2]([C:29]2[CH:34]=[CH:33][N:32]=[C:31]([CH3:35])[CH:30]=2)=[CH:3][C:4]=1[CH3:21]

Participants

Conditions

Temperature: 120 °C

Procedure

To a round bottom flask was added 1-(5-bromo-3-methylpyridin-2-yl)-N-(2,4-dimethoxybenzyl)methanamine 81-3 (1.5 g, 4.3 mmol), 2-methylpyridin-4-ylboronic acid 15-1 (589 mg, 4.3 mmol), Pd(PPh3)4 (248 mg, 0.22 mmol), saturated Na2CO3 (10 mL), ethanol (10 mL) and toluene (30 mL). The reaction was refluxed at 120° C. for 30 hours. After cooling to room temperature, the reaction was diluted into ethyl acetate and washed with brine. The solvent was removed by rotary evaporation. The crude product was purified by silica gel flash chromatography to give N-(2,4-dimethoxybenzyl)-1-(2′,5-dimethyl-3,4′-bipyridin-6-yl)methanamine 81-4. MS m/z 364.2 (M+1).

Workup

temperatureAfter cooling to room temperature
washwashed with brine
customThe solvent was removed by rotary evaporation
customThe crude product was purified by silica gel flash chromatography

Sources & evidence

ORD record: ord-639dab9b00ec4281908aa8ab772be087
Source dataset: uspto-grants-2015_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09181235B2

Reaction notes

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