Some naturally occurring dimethylchromenes. II. Alloevodione

Abstract

The neutral substance C₁₃H₁₁O₂(OCH₃)₃, m.p. 81 °C, isolated from the leaves of Evodia elleryana F. Muell. by Jones and Wright (1946) is shown to be 5,6,7-trimethoxy-8-acetyl-2,2-dimethylchromene (alloevodione), an isomer of evodione already known from the same plant. Various samples from the leaves of E. elleryana differ in chromene content. A sample from the leaves of E. bonwickii F. Muell. contained no neutral chromenes.