Isopropyl isocyanate → N-[2-(7-benzyloxy-2-ethoxymethyl-1H-imidazo[4,5-c]quinolin-1-yl)-1,1-dimethylethyl]-N'-isopropylurea

HRID 2383196Notes

Reaction equation

[CH2:1]([O:8][C:9]1[CH:10]=[CH:11][C:12]2[C:13]3[N:21]([CH2:22][C:23]([NH2:26])([CH3:25])[CH3:24])[C:20]([CH2:27][O:28][CH2:29][CH3:30])=[N:19][C:14]=3[CH:15]=[N:16][C:17]=2[CH:18]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[CH:31]([N:34]=[C:35]=[O:36])([CH3:33])[CH3:32]>ClCCl>[CH2:1]([O:8][C:9]1[CH:10]=[CH:11][C:12]2[C:13]3[N:21]([CH2:22][C:23]([NH:26][C:35]([NH:34][CH:31]([CH3:33])[CH3:32])=[O:36])([CH3:24])[CH3:25])[C:20]([CH2:27][O:28][CH2:29][CH3:30])=[N:19][C:14]=3[CH:15]=[N:16][C:17]=2[CH:18]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

Conditions

Temperature: 0 °C

Procedure

2-(7-Benzyloxy-2-ethoxymethyl-1H-imidazo[4,5-c]quinolin-1-yl)-1,1-dimethylethylamine (1.88 g, 4.65 mmol) and dichloromethane (50 mL) were combined and cooled to 0° C. Isopropyl isocyanate (0.50 mL, 5.11 mmol) was added and the reaction was stirred for 30 minutes. The cooling bath was removed and the reaction was stirred overnight. The volatiles were removed under reduced pressure to give a brown solid. The solid was purified by flash column chromatography on silica gel (eluting with 6% methanol in dichloromethane) to yield 1.96 g of N-[2-(7-benzyloxy-2-ethoxymethyl-1H-imidazo[4,5-c]quinolin-1-yl)-1,1-dimethylethyl]-N′-isopropylurea as a cream colored solid.

Workup

customThe cooling bath was removed
stirringthe reaction was stirred overnight
customThe volatiles were removed under reduced pressure
customto give a brown solid
customThe solid was purified by flash column chromatography on silica gel (eluting with 6% methanol in dichloromethane)

Sources & evidence

ORD record: ord-ccadda6c00a141f08fed44a0623c8f83
Source dataset: uspto-grants-2012_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08263594B2

Reaction notes

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