Diisopropylethylamine → HCID 67434519, compound

Participants

Reaction Steps

N,N-Diisopropylethylamine (3.64 mL, 22 mmol) is added to a stirred solution of 1-{[2-(trimethylsilyl)ethoxy]methyl}-1,3-dihydro-2H-pyrrolo[2,3-b]pyridin-2-one (prepared according to the procedures described in WO2008/020902) (2.64 g, 10 mmol) in THF (75 mL) at ambient temperature. To the stirred mixture is added dropwise a solution of 2-(bromomethyl)-5-nitrobenzoyl chloride (3.06 g, 11 mmol) [Pifferi et al. (1966) Tetrahedron 22, 2107] in THF (75 mL) and the mixture is then stirred at ambient temperature for 18 h. The mixture is then partitioned between EtOAc and saturated aqueous NaHCO3. The layers are separated and the aqueous layer further extracted with EtOAc. The combined organic extracts are washed with brine, dried (Na2SO4) and concentrated in vacuo. The residue is purified by silica gel chromatography (gradient elution with hexanes-EtOAc) to afford the title compound.

Provenance & Evidence