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

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

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


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

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