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Synthesis 2017; 49(20): 4693-4697
DOI: 10.1055/s-0036-1588465
DOI: 10.1055/s-0036-1588465
special topic
A Catalyzed Aerobic Intramolecular C–O Bond Formation: Facile Access to Ring-Fused Dihydrobenzoxazine Derivatives
This project is supported by the National Natural Science Foundation of China (Nos. 21662001, 21472080, 21672089).Further Information
Publication History
Received: 11 April 2017
Accepted after revision: 20 May 2017
Publication Date:
27 June 2017 (online)
Published as part of the Special Topic Modern Strategies for Heterocycles Synthesis
Abstract
A catalyst comprising of catalytic cobalt(II) acetate/copper(II) acetate/dl-tyrosine with oxygen as the oxidant allows aerobic intramolecular C–O bond construction in [2-(pyrrolidin-1-yl)phenyl]methanol by free-radical promoted intramolecular selective functionalization of an (sp3)C–H bond by the alcohol, thus providing an environmentally friendly approach to 5H-benzo[d]pyrrolo[2,1-b][1,3]oxazine derivatives.
Key words
free radicals - C–H functionalization - cross-dehydrogenative coupling - aerobic oxidation - heterocyclesSupporting Information
- Supporting information for this article is available online at https://doi.org/10.1055/s-0036-1588465.
- Supporting Information
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