Cyclopentylacetic acid → 4-[1-benzenesulfonyl-5-(2-cyclopentyl-acetylamino)-1H-pyrrolo[2,3-b]pyridin-4-ylamino]-piperidine-1-carboxylic acid tert-butyl ester

Temperatur

25 °C

Cyclopentylacetic acid (0.532 ml, 4.24 mmol), diisopropylethylamine (1.5 ml, 8.50 mmol) and N-(3-dimethylaminopropyl)-N′-ethylcarbodiimide hydrochloride (0.89 g, 4.70 mmol) were added sequentially to a solution of 4-(5-amino-1-benzenesulfonyl-1H-pyrrolo[2,3-b]pyridin-4-ylamino)-piperidine-1-carboxylic acid tert-butyl ester (2.00 g, 4.00 mmol) in CH2Cl2 (60 ml) at 25° C. The reaction mixture was stirred for 9 h at 25° C., then was partitioned between 1.0 M HCl (125 ml) and CH2Cl2 (125 ml). The organic layer was dried over MgSO4, filtered, and the filtrate was concentrated under reduced pressure. Purification of the residue by column chromatography on silica gel (gradient: 0 to 8% CH3OH in CH2Cl2) afforded 4-[1-benzenesulfonyl-5-(2-cyclopentyl-acetylamino)-1H-pyrrolo[2,3-b]pyridin-4-ylamino]-piperidine-1-carboxylic acid tert-butyl ester (1.05 g, 40%) as an off-white solid. LCMS (Method G, ESI): RT=1.15 min, m+H=582.5. This material was used in the next step below without additional characterization.

1. customwas partitioned between 1.0 M HCl (125 ml) and CH2Cl2 (125 ml)
2. dry with materialThe organic layer was dried over MgSO4
3. filtrationfiltered
4. concentrationthe filtrate was concentrated under reduced pressure
5. customPurification of the residue by column chromatography on silica gel (gradient: 0 to 8% CH3OH in CH2Cl2)

ORD-Eintrag

ord-bf3ed90bd4f74a63b9ba3ea37432826a

Quelldatensatz

uspto-grants-2013_06

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08461328B2