L-Proline → HCID 178469754, compound

Participants

Reaction Steps

To a solution of ethyl 4-oxo-2-[(1-phenylethyl)amino]-4,5-dihydrofuran-3-carboxylate (0.40 g, 1.5 mmol) which similarly prepared according to the procedure described in the Example 4, First step and 7-azaindole-3-carboxaldehyde (0.21 g, 1.5 mmol) in ethanol (20 mL), L-proline (0.017 g, 0.15 mmol) was added at ambient temperature. The mixture was refluxed for 3 days. Cooled to ambient temperature, the precipitate was collected by filtration, washed with methanol then dried to afford the titled compound as solid (0.20 g, y. 34%).

Provenance & Evidence