8-Hydroxyquinoline → HCID 90409343, compound

Participants

Reaction Steps

A solution of 5-tert-butyl 4-ethyl 6,7-dihydro-1H-imidazo[4,5-c]pyridine-4,5(4H)-dicarboxylate (0.65 g, 2.20 mmol), iodobenzene (0.45 g, 2.20 mmol), copper (I) oxide (0.03 g, 0.22 mmol), 8-hydroxyquinoline (0.06 g, 0.44 mmol), and Cs2CO3 (1.40 g, 4.40 mmol) in DMSO (2 mL) was irradiated in a microwave apparatus for 1 hour at 140° C. The reaction was diluted with H2O (100 mL) and extracted with EtOAc (75 mL×3). The organic layers were combined, dried (Na2SO4), and concentrated. Chromatography of the resulting residue (SiO2; MeOH(NH3):DCM) gave the title compound (0.41 g, 50%). MS (ESI): mass calculated for C20H25N3O4, 371.2. m/z found 272.2 [M+H—BOC]+.

Provenance & Evidence