1,4-Dioxa-8-azaspiro(4.5)decane → 5-Chloro-1H-pyrrolo[2,3-c]pyridine-2-carboxylic acid [2-(1,4-dioxa-8-azaspiro[4.5]dec-8-yl)-1-(S)-(4-fluorobenzyl)-2-oxoethyl]amide

Participants

Reaction Steps

To a solution of 2-(S)-[(5-chloro-1H-pyrrolo[2,3-c]pyridine-2-carbonyl)amino]-3-(4-fluorophenyl)propionic acid (EXAMPLE 228, 40 mg, 0.11 mmol) in DMF (4 mL) was added HATU (50 mg, 0.13 mmol) and the reaction stirred for 10 min. 4-Piperidone ethylene ketal (19 mg, 0.13 mmol) was added, followed by DIPEA (23 μL, 0.13 mmol) and the reaction stirred at rt for 16 h. Solvent was removed in vacuo and the crude material partitioned between ethyl acetate (15 mL) and water (15 mL). The organic layer was washed with 1M HCl solution (15 mL), sodium bicarbonate solution (2×20 mL) then brine (2×20 mL), dried (MgSO4) and the solvent removed in vacuo. Purification by chromatography using dichloromethane/methanol (9:1) as the eluent gave the title compound as a pale yellow powder. (ES+)=487.30 [M+H]+; RT=3.28 min.

Provenance & Evidence