Absorption, fluorescence, and two-photon excitation ability of 5-phenyl-13-arylisoindolo[2,1-a]quinolines prepared by one-pot reaction of ring-closing metathesis and 1,3-dipolar cycloaddition
Substituted 5-phenyl-13-aryl-isoindolo[2,1-a]quinoline dyes that exhibit two-photon absorption up to 375 GM have been synthesized via ruthenium-catalyzed ring-closingmetathesis in tandem with a 1,3-dipolar cycloaddition reaction.
One-Pot Ring-Closing Metathesis/1,3-Dipolar Cycloaddition through Assisted Tandem Ruthenium Catalysis: Synthesis of a Dye with Isoindolo[2,1-<i>a</i>]quinoline Structure
The one‐pot tandem reaction of N‐alkyl‐N‐allyl‐2‐vinylaniline derivatives with benzo‐ or naphthoquinones and a ruthenium–alkylidene catalyst leads to isoindolo[2,1‐a]quinolines in a variety of colors, which can be altered by exchanging the substituent on the core heterocycle (see scheme). This reaction offers a new synthetic method for π‐conjugated small molecules from simple aniline derivatives.