BF3.Et2O controlled reactions of methyl enol ethers: Selective synthesis of dihydrofuro[3,2-c]chromenone and furo[3,2-c]chromenone derivatives

AHMAD, SARWAT ASMA ZIYA and Khan, Faiz Ahmed (2022) BF3.Et2O controlled reactions of methyl enol ethers: Selective synthesis of dihydrofuro[3,2-c]chromenone and furo[3,2-c]chromenone derivatives. Synlett. ISSN 0936-5214

Full text not available from this repository. (Request a copy)

Abstract

A facile one-step synthetic approach to dihydrofuro[3,2-c]chromenones and furo[3,2-c]chromenones by the reaction of methyl enol ethers with 4-hydroxy coumarin in a metal-free condition is presented. Dihydrofuro[3,2-c]chromenones and furo[3,2-c]chromenones were selectively obtained by controlling the stoichiometry of boron trifluoride diethyl etherate (BF 3.Et 2O). An unexpected aryl group migration followed by aromatization of furan moiety leading to a variety of furo[3,2-c]chromenone derivatives in good yields is reported. © 2022 Georg Thieme Verlag. All rights reserved.

[error in script]

IITH Creators: