HCID 58577742, compound → N2-[4-(benzyloxy)phenyl]-5-methylpyridine-2,3-diamine

HRID 587536Notes

Reaction equation

[CH2:1]([O:8][C:9]1[CH:14]=[CH:13][C:12]([NH:15][C:16]2[C:21]([N+:22]([O-])=O)=[CH:20][C:19]([CH3:25])=[CH:18][N:17]=2)=[CH:11][CH:10]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1>C(O)(=O)C.C1COCC1.[Zn]>[CH2:1]([O:8][C:9]1[CH:10]=[CH:11][C:12]([NH:15][C:16]2[C:21]([NH2:22])=[CH:20][C:19]([CH3:25])=[CH:18][N:17]=2)=[CH:13][CH:14]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

Conditions

Temperature: 0 °C

Procedure

To a solution of N-[4-(benzyloxy)phenyl]-5-methyl-3-nitropyridin-2-amine (1.33 g) in acetic acid (10 mL) and THF (10 mL) was added zinc (2.59 g) at 0° C., and the mixture was stirred at 0° C. for 2 h. After stirring at room temperature overnight, the mixture was filtered and the filtrate was concentrated in vacuo. The residue was diluted with AcOEt, washed with sat. NaHCO3, dried over Na2SO4, filtered and concentrated in vacuo. The residue was purified by column chromatography (NH silica gel, eluted with 5%-50% AcOEt in hexane) to give N2-[4-(benzyloxy)phenyl]-5-methylpyridine-2,3-diamine (0.63 g) as a blue solid.

Workup

stirringAfter stirring at room temperature overnight
filtrationthe mixture was filtered
concentrationthe filtrate was concentrated in vacuo
additionThe residue was diluted with AcOEt
washwashed with sat. NaHCO3
dry with materialdried over Na2SO4
filtrationfiltered
concentrationconcentrated in vacuo
customThe residue was purified by column chromatography (NH silica gel, eluted with 5%-50% AcOEt in hexane)

Sources & evidence

ORD record: ord-ad65cac33ebc43c7ba761070bd324cea
Source dataset: uspto-grants-2016_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09226921B2

Reaction notes

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