Synthesis 2024; 56(03): 507-517
DOI: 10.1055/a-2193-5593
paper

A Rearrangement of 4-Phenylbenzo[d]oxazoles to Phenanthridin-4-ols

Authors

  • Anton L. Shatsauskas

    a   Laboratory of New Organic Materials, Omsk State Technical University, Mira Ave. 11, 644050 Omsk, Russian Federation
  • Ekaterina S. Keyn

    b   Department of Organic and Analytical Chemistry, Omsk F. M. Dostoevsky State University, Mira ave. 55A, Omsk 644077, Russian Federation
  • Anton J. Stasyuk

    c   Institut de Química Computacional and Departament de Química, Universitat de Girona, C/ Maria Aurèlia Capmany 69, Girona, Catalonia, 17003, Spain
  • Sergey A. Kirnosov

    b   Department of Organic and Analytical Chemistry, Omsk F. M. Dostoevsky State University, Mira ave. 55A, Omsk 644077, Russian Federation
  • Vladislav Yu. Shuvalov

    a   Laboratory of New Organic Materials, Omsk State Technical University, Mira Ave. 11, 644050 Omsk, Russian Federation
  • Anastasia S. Kostyuchenko

    a   Laboratory of New Organic Materials, Omsk State Technical University, Mira Ave. 11, 644050 Omsk, Russian Federation
  • Alexander S. Fisyuk

    a   Laboratory of New Organic Materials, Omsk State Technical University, Mira Ave. 11, 644050 Omsk, Russian Federation
    b   Department of Organic and Analytical Chemistry, Omsk F. M. Dostoevsky State University, Mira ave. 55A, Omsk 644077, Russian Federation

This work was supported by the Russian Science Foundation (Grant No. 22-13-00356).


Graphical Abstract

Preview

Abstract

A new approach was developed for the synthesis of phenanthridin-4-ols and 4-hydroxyphenanthridin-6(5H)-one derivatives in 43–89% yields based on the AlCl3-mediated rearrangement of available 4-phenylbenzo[d]oxazoles and 4-phenyl-1,3-benzoxazol-2(3H)-one. The quantum chemical calculations were used to describe the mechanism and predict the thermodynamic parameters of the reaction under study.

Supporting Information



Publication History

Received: 09 September 2023

Accepted after revision: 17 October 2023

Accepted Manuscript online:
17 October 2023

Article published online:
22 November 2023

© 2023. Thieme. All rights reserved

Georg Thieme Verlag KG
Rüdigerstraße 14, 70469 Stuttgart, Germany