Acetic Acid → N-((1S,3S,4R)-3-(3-(4-chloro-1-tosyl-1H-pyrrolo[2,3-b]pyridin-5-yl)propylamino)-4-ethylcyclopentyl)cyclopropanesulfonamide

Participants

Reaction Steps

To a mixture of 3-(4-chloro-1-tosyl-1H-pyrrolo[2,3-b]pyridin-5-yl)propanal (0.420 g, 1.04 mmol) and N-((1S,3S,4R)-3-amino-4-ethylcyclopentyl)cyclopropanesulfonamide (0.290 g, 1.25 mmol, prepared using OOO from Example #23 step E with NaOH) in DCE (4.00 mL) was added glacial acetic acid (0.089 mL, 1.6 mmol). The reaction mixture stirred for about 15 min at ambient temperature and sodium triacetoxyborohydride (0.331 g, 1.56 mmol) was added. The reaction was left stirring at ambient temperature for about 72 h. Saturated aqueous NaHCO3 (about 5 mL) was slowly added followed by DCM (5 mL). The layers were separated and the aqueous phase was extracted with DCM (2×5 mL). The combined organics were dried over anhydrous MgSO4, filtered and concentrated under reduced pressure. The remaining yellow oil was purified by silica gel chromatography eluting with a gradient of 0-50% EtOAc in heptane to give N-((1S,3S,4R)-3-(3-(4-chloro-1-tosyl-1H-pyrrolo[2,3-b]pyridin-5-yl)propylamino)-4-ethylcyclopentyl)cyclo-propanesulfonamide (0.330 g, 55%) as a white foam: LC/MS (Table 1, Method b) Rt=2.10 min; MS m/z: 579 (M+H)+.

Provenance & Evidence