CC BY 4.0 · SynOpen 2023; 07(03): 394-400
DOI: 10.1055/a-2148-9433
paper

Synthesis of Novel Phosphorus-Substituted Stable Isoindoles by a Three-Component Coupling Reaction of ortho-Phthalaldehyde, 9,10-Dihydro-9-oxa-10-phosphaphenanthrene 10-Oxide, and Primary Amines

Michiyasu Nakao
a   Graduate School of Pharmaceutical Sciences, Tokushima University, Sho-machi, Tokushima 770-8505, Japan
,
Akihito Nakamura
a   Graduate School of Pharmaceutical Sciences, Tokushima University, Sho-machi, Tokushima 770-8505, Japan
,
Tomoyuki Takesue
a   Graduate School of Pharmaceutical Sciences, Tokushima University, Sho-machi, Tokushima 770-8505, Japan
,
Syuji Kitaike
a   Graduate School of Pharmaceutical Sciences, Tokushima University, Sho-machi, Tokushima 770-8505, Japan
,
Hiro-O Ito
b   Department of Preventive Dentistry, Graduate School of Biomedical Sciences, Tokushima University, Kuramoto-cho, Tokushima 770-8504, Japan
,
Shigeki Sano
a   Graduate School of Pharmaceutical Sciences, Tokushima University, Sho-machi, Tokushima 770-8505, Japan
› Author Affiliations
This work was supported by Japan Society for the Promotion of Science (JSPS KAKENHI; Grant Number JP21K10256).


Abstract

A three-component coupling reaction of ortho-phthalaldehyde, 9,10-dihydro-9-oxa-10-phosphaphenanthrene 10-oxide, and various primary amines readily afforded novel phosphorus-substituted stable isoindoles in good to excellent yields. The importance of the reversible ring-opening of 9,10-dihydro-9-oxa-10-phosphaphenanthrene 10-oxide by methanolysis in the three-component coupling reaction became apparent.

Supporting Information



Publication History

Received: 14 July 2023

Accepted after revision: 03 August 2023

Accepted Manuscript online:
04 August 2023

Article published online:
28 August 2023

© 2023. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by/4.0/)

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