Triethylamine → HCID 86626177, compound

Participants

Reaction Steps

Ethoxyacetyl chloride (3.5 mL, 32.0 mmol) was added to a solution of tert-butyl [2-(3-amino-6-benzyloxyquinolin-4-ylamino)-1,1-dimethylethyl]carbamate (12.71 g, 29.1 mmol) and triethylamine (8.1 mL, 58.2 mmol) in approximately 250 mL of anhydrous dichloromethane. After stirring for 2 hours, the volatiles were removed under reduced pressure and the resulting brown residue was dissolved in ethanol, followed by the addition of 8.1 mL of triethylamine. The reaction was heated at reflux for 2.5 days and then cooled to ambient temperature. The solvent was removed under reduced pressure and dichloromethane was added. The solution was sequentially washed with aqueous sodium bicarbonate (2×) followed by brine; dried over sodium sulfate; filtered, and concentrated under reduced pressure. The residue was purified by column chromatography on a HORIZON HPFC system. A silica gel cartridge was used eluting with a gradient of 0-15% CMA in chloroform to provide 8.4 g of tert-butyl [2-(8-benzyloxy-2-ethoxymethyl-1H-imidazo[4,5-c]quinolin-1-yl)-1,1-dimethylethyl]carbamate as an orange foam.

Provenance & Evidence