Morpholine → HCID 57657229, compound

Participants

Reaction Steps

3-[4-Amino-1-(2-hydroxy-2-methylpropyl)-2-(methoxymethyl)-1H-imidazo[4,5-c]quinolin-7-yl]propanoic acid (1.25 g, 3.30 mmol), anhydrous pyridine (75 mL) and 1-hydroxybenzotriazole (892 mg, 6.60 mmol) were combined and the reaction was stirred for 30 minutes. 1-(3-Dimethylaminopropyl)-3-ethylcarbodiimide (1.27 g, 6.60 mmol) was added and the reaction mixture was stirred for an additional 15 minutes. Morpholine (581 mg, 6.60 mmol) was added in one portion. After stirring for 18 hours the solution was concentrated under reduced pressure. The resulting foam was dissolved in chloroform (50 mL) and washed with 1% aqueous sodium carbonate (2×15 mL). The combined aqueous washes were extracted with chloroform. The combined organic fractions were concentrated under reduced pressure and then purified by chromatography using a HORIZON HPFC system (silica cartridge, eluting with a CMA:chloroform gradient; 0-20% CMA over 1500 mL, followed by 20-25% CMA over 500 mL, and finally 25-30% CMA over 500 mL). A final recrystallization from acetonitrile provided 913 mg of 3-[4-amino-2-(methoxymethyl)-7-(3-morpholin-4-yl-3-oxopropyl)-1H-imidazo[4,5-c]quinolin-1-yl]-2-methylpropan-2-ol as an off-white solid, mp 215-217° C.

Provenance & Evidence