Ammonium Chloride → 1-(3-(4-methoxybenzyl)-3H-imidazo[4,5-c]pyridin-6-yl)ethanamine

HRID 2409053Notes

Reaction equation

[CH3:1][O:2][C:3]1[CH:22]=[CH:21][C:6]([CH2:7][N:8]2[C:12]3[CH:13]=[N:14][C:15]([C:17](=[N:19]O)[CH3:18])=[CH:16][C:11]=3[N:10]=[CH:9]2)=[CH:5][CH:4]=1.[Cl-].[NH4+]>CO.CC(O)=O.[Zn]>[CH3:1][O:2][C:3]1[CH:22]=[CH:21][C:6]([CH2:7][N:8]2[C:12]3[CH:13]=[N:14][C:15]([CH:17]([NH2:19])[CH3:18])=[CH:16][C:11]=3[N:10]=[CH:9]2)=[CH:5][CH:4]=1

Participants

Conditions

Temperature: 60 °C

Procedure

A mixture of 1-(3-(4-methoxybenzyl)-3H-imidazo[4,5-c]pyridin-6-yl)ethanone oxime (320 mg, 1.08 mmol), zinc (3.53 g, 54.00 mmol), and ammonium chloride (2.89 g, 54.00 mmol) in MeOH (10 mL) and HOAc (2 mL) was heated at 60° C. for 4 h. The reaction mixture was filtered and the filtrate was concentrated under reduced pressure. To the residue was added an aqueous solution of ammonia (50 mL) and the resulting mixture was extracted with DCM (50 mL×3). The combined extracts were dried (MgSO4), filtered and concentrated under reduced pressure. The residue was purified by SiO2 chromatography eluting with CH2Cl2:MeOH:Et3N (10:1:0.2) to afford 200 mg (66%) of 1-(3-(4-methoxybenzyl)-3H-imidazo[4,5-c]pyridin-6-yl)ethanamine as a colorless oil. MS (ESI): m/z=283.2[M+1]+.

Workup

filtrationThe reaction mixture was filtered
concentrationthe filtrate was concentrated under reduced pressure
additionTo the residue was added an aqueous solution of ammonia (50 mL)
extractionthe resulting mixture was extracted with DCM (50 mL×3)
dry with materialThe combined extracts were dried (MgSO4)
filtrationfiltered
concentrationconcentrated under reduced pressure
customThe residue was purified by SiO2 chromatography
washeluting with CH2Cl2:MeOH:Et3N (10:1:0.2)

Sources & evidence

ORD record: ord-67e5765c4033478eb9b26ffefdcf8aed
Source dataset: uspto-grants-2014_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08815877B2

Reaction notes

Loading…