Synthesis 2024; 56(09): 1485-1497
DOI: 10.1055/a-2243-4727
paper

Synthesis of Thiazole-fused Tricyclic Quinazolinone Alkaloids and Their Derivatives

,
Corentin Layec
,
Corinne Fruit
,
This work was partially supported by the Université de Rouen, Normandy, the Institut National des Sciences Appliquées Rouen (INSA Rouen Normandy), the Centre National de la Recherche Scientifique (CNRS), the European Regional Development Fund (ERDF), Labex SynOrg (ANR-11-LABX-0029), Carnot Institute I2C, the XL-Chem Graduate School of Research (ANR-18-EURE-0020 XL CHEM), and the Région Normandie. N.B. thanks the Ministère de l’Enseignement supérieur, de la Recherche et de l’Innovation (MESRI) for a PhD grant. C.L. thanks the XL-Chem Graduate School of Research for a grant.


Abstract

The synthesis of thiazole-fused derivatives of tricyclic quinazolinones hitherto undescribed was successfully achieved by replacing anthranilic acid or its derivatives by isomeric polyfunctionalized benzothiazole analogues of anthranilic methyl esters. Some of the new heterocyclic systems are inspired by natural alkaloids such as mackinazolinone, deoxyvasicinone, and isaindigotone, showing interesting biological properties. The microwave-assisted method developed is a variant of the Niementowski reaction and was also applied to the synthesis of ring-extended rutaecarpine derivatives.

Supporting Information



Publication History

Received: 20 December 2023

Accepted after revision: 11 January 2024

Accepted Manuscript online:
11 January 2024

Article published online:
12 February 2024

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