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Synthesis 2023; 55(09): 1441-1450
DOI: 10.1055/s-0042-1751406
DOI: 10.1055/s-0042-1751406
paper
A Novel Ring-Opening/Ring-Closing Cascade Reaction Selectively Induced by Aliphatic Primary Amine Using Phenolic Hydroxyl as a Traceless Directing Group
This work was supported by the National Natural Science Foundation of China (Nos. 21662046 and 21202142), the Yunnan Local Colleges Research Projects of China (No. 202101BA070001-049), and the Program of Innovative Research Team (in science and technology) in University of Yunnan Province and Scientific and Technological Innovation Team for Green Catalysis and Energy Material in Yunnan Institutions of Higher Learning.
Abstract
An interesting ring-closing/ring-opening cascade reaction selectively induced by aliphatic primary amine for the synthesis of functionalized aminomaleimides is described. This work features phenolic hydroxyl as a traceless directing group that forms a critical six-membered intermediate and then a lactone ammonolysis/intramolecular amidation sequence. This two-step, one-pot practical protocol has broad substrate scope (39 examples) and delivers structurally diverse aminomaleimides in good to excellent yields.
Key words
aminomaleimides - ring-closing/ring-opening reaction - aliphatic primary amines - phenolic hydroxyl - directing groupSupporting Information
- Supporting information for this article is available online at https://doi.org/10.1055/s-0042-1751406.
- Supporting Information
- CIF File
Publikationsverlauf
Eingereicht: 25. November 2022
Angenommen nach Revision: 14. Dezember 2022
Artikel online veröffentlicht:
12. Januar 2023
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