Cyclopropanecarbonyl chloride → Hydrochloric Acid

Participants

Reaction Steps

3-(4-(1-Cyclopentylpiperidin-4-yl)phenylamino)-5-((3aR,7aR)-dihydro-1H-pyrrolo[3,2-b]pyridin-4(2H,5H,6H,7H,7aH)-yl)pyrazine-2-carboxamide (420) (82 mg, 0.16 mmol) was dissolved in 3 mL NMP. To it were added DIEA (290 μL, 1.68 mmol) and then cyclopropanecarbonyl chloride (61 μL, 0.67 mmol). The mixture was stirred at RT for 2 hours, quenched with 0.5 mL TFA, and subjected to reverse phase prep HPLC using 5 mM HCl (aq) and neat MeCN as mobile phases to isolate 3-(4-(1-cyclopentylpiperidin-4-yl)phenylamino)-5-((3aR,7aR)-1-(cyclopropanecarbonyl)dihydro-1H-pyrrolo[3,2-b]pyridin-4(2H,5H,6H,7H,7aH)-yl)pyrazine-2-carboxamide (422) as HCl salt (58 mg, 62%). LC-MS (ESI): m/z (M+1) 558.8. UV: λ=266, 274, 304, 334, 372 nm.

Provenance & Evidence