Sodium Dithionite → tert-Butyl(1-(2-(1-ethyl-1H-pyrrolo[2,3-b]pyridin-2-yl)-1-methyl-1H-benzo[d]imidazole-5-carbonyl)piperidin-3-yl)carbamate

Participants

Reaction Conditions

Reaction Steps

Sodium hydrosulfite (235 mg, 1.150 mmol) dissolved in water (1.500 mL) was added to a solution of tert-butyl(1-(4-(methylamino)-3-nitrobenzoyl)piperidin-3-yl)carbamate (145 mg, 0.383 mmol) and 1-ethyl-1H-pyrrolo[2,3-b]pyridine-2-carbaldehyde (66.7 mg, 0.383 mmol) in ethanol (3 mL) at RT under nitrogen. The reaction mixture was heated to 100° C. in a microwave for 5 h. The reaction mixture was diluted with DCM (20 mL), Na2SO4 was added and the resultant suspension filtered and concentrated in vacuo to yield the crude product as a yellow oil. The crude product was purified by Biotage SP4 on a SNAP 25 g silica cartridge using a gradient of 0% (20% MeOH/DCM)/DCM→100% (20% MeOH/DCM)/DCM. Appropriate fractions were combined and evaporated under vacuum to give the title compound as a yellow solid (104 mg).

Provenance & Evidence