Diisopropylethylamine → 8-Hydroxy-2-oxo-2H-chromene-3-carboxylic acid (2'-cyano-biphenyl-3-yl)-amide

Participants

Reaction Steps

DIEA (0.015 mL, 0.085 mmol) was added to 8-hydroxy-3-carboxy-coumarin (0.016 g, 0.077 mmol) and HATU (0.032 g, 0.085 mmol) in 0.45 mL of DMF with constant stirring at room temperature until a clear solution resulted. Subsequently, 2′-cyano-biphenyl-3-ylamine (0.015 g, 0.077 mmol) was added and allowed to react overnight. DMF was removed under vacuum and the reaction was resuspended in DMSO. The crude product was purified on a Parallex Flex parallel preparative reverse phase HPLC instrument (Biotage) using a solvent gradient of 10-95% ACN/H2O with 0.05% TFA at a flow rate of 20 mL/min. UV absorbance was monitored at 254 nm and the fractions corresponding to the product peak were collected and lyophilized for 48 hours to give 0.008 g of product in 26% yield: LCMS (ESI) m/z 383 (MO.

Provenance & Evidence