A Fache Synthesis of 2-Methyl Benz of Urano Derivatives from Polyphenois

Abstract

Although 2-methyl benzofurano ring system is rarely found in natural products, 2-isopropenyl and 2-isopropyl benzofurano derivdtives do occur in Nature. For example, euparin (1) is present in Eupatorium purpureum, E. cannabinum and in Plourensia cernua³ and peucedanin (2) in Peucedanum officinale.⁴ Sinilarly 3, 3 and 5 occur in Flourensia resinosa.³