Ethanol → HCID 178456492, compound

Participants

Reaction Steps

A suspension of (E)-4-(1,2,3,6-tetrahydro-2,6-dioxo-1,3-dipropyl-9H-purin-8-yl)cinnamic acid (4.00 g, 10.4 mmol) (Example 6) and concentrated sulfuric acid (1 ml) in absolute ethanol (1.5L) was refluxed for 2 hours with slow distillation of 75 ml of vapor. Reflux was continued for 3 days with exclusion of moisture with 50 ml distillate being removed during the final 4 hours. The cooled suspension was filtered to yield ethyl (E)-4-(1,2,3,6-tetrahydro-2,6-dioxo-1,3-dipropyl-9H-purin-8-yl)cinnamate as a pale yellow solid. mp >300° C. Analysis for (C22H26N4O4). C,64.38; H,6.38; N,13.65. Found: C,64.34; H,6.43; N,13.63.

Provenance & Evidence