Triethylamine → 8-Chloro-1-(2,4-dichlorophenyl)-5-(1-ethylpropyl)-1H-imidazo[1,2-a]benzimidazol-2(3H)-one

To a suspension of {4-chloro-2-[(2,4-dichlorophenyl)amino]-7-(1-ethylpropyl)-1H-benzimidazol-1-yl}acetic acid (Reference Example 21; 294 mg, 0.667 mmol) in N,N-dimethylformamide (3 mL) were added triethylamine (0.11 mL, 0.800 mmol) and 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (153 mg, 0.800 mmol), and the mixture was stirred at room temperature for 15 hr. The reaction mixture was diluted with water, and the suspension was stirred at room temperature for 1.5 hr. The resulting solid was collected by filtration and washed with water. The crystal was recrystallized from diisopropyl ether-n-hexane to give 160 mg (0.378 mmol, 57%) as a colorless crystal.

1. stirringthe suspension was stirred at room temperature for 1.5 hr
2. filtrationThe resulting solid was collected by filtration
3. washwashed with water
4. customThe crystal was recrystallized from diisopropyl ether-n-hexane
5. customto give 160 mg (0.378 mmol, 57%) as a colorless crystal

ORD record

ord-bbc722e72d36492b9c70967ef35ce4b9

Source dataset

uspto-grants-2014_07

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08785460B2