One-pot Synthesis of Indenonaphthopyrans Catalyzed by Copper(II) Triflate: A Comparative Study of Reflux and Ultrasound Methods


TURHAN K. , OZTURKCAN S. A. , ULUER M., TURGUT Z.

ACTA CHIMICA SLOVENICA, vol.61, no.3, pp.623-628, 2014 (Journal Indexed in SCI) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 61 Issue: 3
  • Publication Date: 2014
  • Title of Journal : ACTA CHIMICA SLOVENICA
  • Page Numbers: pp.623-628
  • Keywords: Indenonaphthopyran, ultrasound, copper(II) triflate, 1,3-indandione, 2-naphthol, PROMOTED SYNTHESIS, IONIC LIQUIDS, BETA-NAPHTHOL, DERIVATIVES, CONDENSATION, CHLORIDE, ACID

Abstract

An effective and environment-friendly protocol for the synthesis of indenonaphthopyrans has been developed by one-pot reaction of 2-naphthol, various aromatic aldehydes and 1,3-indandione, in the presence of copper(II) triflate as the catalyst while using reflux (Method A) and ultrasound (Method B). The Method B approach offers the advantages of a simple reaction method, short reaction time, excellent yield, and showcases the economic importance of the catalysts for such processes.