Oxalyl chloride → HCID 67990391, compound

Participants

Reaction Steps

To a suspension of 7-(2-methoxyethoxy)imidazo[1,2-a]pyridine-3-carboxylic acid (50 mg; 0.21 mmol) in methylene chloride (2 mL) was added a catalytic (0.005 mL) amount of DMF followed by oxalyl chloride (0.23 mmol; 2M solution in methylene chloride). The mixture was stirred in a sealed vial until effervescence ceased (approximately 30 minutes), with occasional venting to release gas. 1-Benzyl-1H-indazol-4-amine (Example 155, Steps A-B; 47 mg; 0.21 mmol) was added as a solution in methylene chloride (1 mL) followed by diisopropylethylamine (33 mg; 0.25 mmol). The mixture was stirred for 16 hours at ambient temperature, during which time a suspension formed. The mixture was partitioned between water and methylene chloride and the suspension was extracted multiple times with methylene chloride. The combined organic phases (which contained suspended solids) were concentrated under reduced pressure. The resulting solid material was triturated with ether and collected by filtration. The solids were washed with ether, water and then ether again. The material was dried under vacuum to give an off white solid (67 mg). MS (APCI), m/z=442.2 (M+H).

Provenance & Evidence