Synthesis and Properties of 1-Azapyrenes

J Org Chem. 2022 Sep 2;87(17):11296-11308. doi: 10.1021/acs.joc.1c02394. Epub 2022 Mar 16.

Abstract

A straightforward method for the synthesis of a series of hitherto unknown 1-azapyrenes is reported, which relies on a combination of Pd-catalyzed cross-coupling reactions with Brønsted acid-mediated cycloisomerization reactions. The methodology is highly modular and allows an efficient synthesis of various substituted products in high yields. The structural, electrochemical, and photophysical properties of 1-azapyrenes have been studied by ultraviolet-visible (UV-vis) and fluorescence spectroscopies, cyclic voltammetry, and density functional theory (DFT) calculations.