Ethylene carbonate → HCID 54070148, compound

Participants

Reaction Steps

4'-Hydroxyflavan (2.26 g.), ethylene carbonate (8.8 g.) and tetramethylammonium iodide (0.30 g.) were heated together at 140° C. for 4 hrs. Sodium hydroxide (6.5 g) in water (20 ml.) and ethanol (250 ml.) was added, and the solution boiled under reflux for 5 hrs. The solution was filtered, diluted with water, and extracted 3 times with ether. The combined extracts were dried and evaporated, and the residue chromatographed on neutral alumina. The product was eluted with chloroform and after evaporation of the solvent was recrystallised from 60°-80° C. petroleum ether to yield 4'-(2-hydroxyethoxy) flavan (1.2 g.) m.p. 84°-85° C.

Provenance & Evidence