Potassium Carbonate → 2-(methoxymethyl)-1-propyl-8-[3-(4-pyridin-2-ylpiperazin-1-yl)propoxy]-1H-imidazo[4,5-c]quinolin-4-amine

HRID 540962Notes

Reaction equation

Cl[CH2:2][CH2:3][CH2:4][O:5][C:6]1[CH:15]=[CH:14][C:13]2[N:12]=[C:11]([NH2:16])[C:10]3[N:17]=[C:18]([CH2:23][O:24][CH3:25])[N:19]([CH2:20][CH2:21][CH3:22])[C:9]=3[C:8]=2[CH:7]=1.C(=O)([O-])[O-].[K+].[K+].[N:32]1[CH:37]=[CH:36][CH:35]=[CH:34][C:33]=1[N:38]1[CH2:43][CH2:42][NH:41][CH2:40][CH2:39]1>CN(C=O)C>[CH3:25][O:24][CH2:23][C:18]1[N:19]([CH2:20][CH2:21][CH3:22])[C:9]2[C:8]3[CH:7]=[C:6]([O:5][CH2:4][CH2:3][CH2:2][N:41]4[CH2:42][CH2:43][N:38]([C:33]5[CH:34]=[CH:35][CH:36]=[CH:37][N:32]=5)[CH2:39][CH2:40]4)[CH:15]=[CH:14][C:13]=3[N:12]=[C:11]([NH2:16])[C:10]=2[N:17]=1

Participants

Conditions

Temperature: 70 °C

Procedure

A mixture of 8-(3-chloropropoxy)-2-(methoxymethyl)-1-propyl-1H-imidazo[4,5-c]quinolin-4-amine (0.20 g, 0.55 mmol, 1 equivalent), potassium carbonate (4 equivalents), and 1-(2-pyridyl)piperazine (1.1 equivalents) in DMF (5 mL) was heated at 70° C. overnight. The reaction mixture was allowed to cool to room temperature and was poured onto ice (50 g). After the mixture was stirred for 3 hours, a brown solid was isolated by filtration. The crude product was purified by chromatography on a HORIZON HPFC system (silica gel, gradient elution with 0-30% CMA in chloroform), followed by recrystallization from acetonitrile to afford 0.065 g of 2-(methoxymethyl)-1-propyl-8-[3-(4-pyridin-2-ylpiperazin-1-yl)propoxy]-1H-imidazo[4,5-c]quinolin-4-amine as off white crystals, mp 196-197° C.

Workup

temperatureto cool to room temperature
additionwas poured onto ice (50 g)
customa brown solid was isolated by filtration
customThe crude product was purified by chromatography on a HORIZON HPFC system (silica gel, gradient elution with 0-30% CMA in chloroform)
customfollowed by recrystallization from acetonitrile

Sources & evidence

ORD record: ord-374e540cf8f94cf49f12b1e9bd555a98
Source dataset: uspto-grants-2014_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08871782B2

Reaction notes

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