Synthesis and photophysical properties of 2-aryl-6,8-bis(arylethenyl)-4-methoxyquinolines

Molecules. 2012 Nov 30;17(12):14186-204. doi: 10.3390/molecules171214186.

Abstract

Iodine-methanol mediated oxidative-aromatization of 2-aryl-6,8-dibromo-2,3-dihydroquinolin-4(1H)-ones afforded the corresponding 2-aryl-6,8-dibromo-4-methoxy-quinolines in high yield and purity. The isomeric 1-(2-amino-3,5-dibromophenyl)-3-aryl-2-propen-1-ones reacted with iodine in methanol afford in a single pot operation the corresponding 2-aryl-6,8-dibromo-4-methoxyquinoline (major) and 2-aryl-6,8-dibromoquinolin-4(1H)-one (minor) products that were separated in sequence by column chromatography on silica gel. Suzuki-Miyaura cross-coupling of the 6,8-dibromo-4-methoxyquinoline derivatives with excess arylvinylboronic acids afforded the corresponding 2-aryl-6,8-bis(2-arylethenyl)-4-methoxyquinolines. The absorption and fluorescence properties of these compounds were also determined.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Absorption
  • Fluorescence*
  • Iodine / chemistry*
  • Molecular Structure
  • Oxidation-Reduction
  • Quinolines* / chemical synthesis
  • Quinolines* / chemistry

Substances

  • Quinolines
  • Iodine