Ethanol → HCID 178517225, compound

Participants

Reaction Conditions

Reaction Steps

To a suspension of 6-iodoquinoline-2,4-diol (498.2 g, 1.736 mol) and diethyl 2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylate (439.6 g, 1.736 mol) in pyridine (3.5 L) was added 4-(trifluoromethyl)benzaldehyde (332.4 g, 1.909 mol). The resulting mixture was warmed with stirring to 105° C. for a period of 6 h. After cooling to room temperature, the heterogeneous mixture was treated with ethanol (4.6 L). White solids were isolated through filtration, washed with 57:43 ethanol:pyridine (800 mL), and dried in a vacuum oven at 65° C. The title compound was obtained in a 1:0.92 ratio with pyridine and used directly in the subsequent step.

Provenance & Evidence