Article (Scientific journals)
Continuous Flow Synthesis of Carbonylated Heterocycles via Pd-Catalyzed Oxidative Carbonylation Using CO and O2 at Elevated Temperatures and Pressures
Chen, Yuesu; Hone, Christopher A.; Gutmann, Bernhard et al.
2017In Organic Process Research and Development, 21 (7), p. 1080 - 1087
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Keywords :
Catalyst loadings; Continuous flows; Continuous-flow process; Continuous-flow synthesis; Elevated pressure; Elevated temperature; Oxidative carbonylation; Residence time; Physical and Theoretical Chemistry; Organic Chemistry
Abstract :
[en] A continuous-flow Pd-catalyzed oxidative carbonylation protocol utilizing CO and O2 gas for the synthesis of carbonylated heterocycles is described. The optimization of temperature, pressure, CO/O2 ratio, catalyst loading, and reaction time resulted in process intensified conditions for this transformation. The optimized continuous flow conditions (120 °C, 20 bar pressure, 24 min residence time) were used to prepare a number of benzoxazolone, 2-benzoxazolidinone, and other biologically and synthetically important five- and six-membered carbonylated heterocycles in good overall yield and purity (14 examples). The continuous-flow process enables the safe and scalable oxidative carbonylation using CO/O2 under elevated pressures and temperatures.
Disciplines :
Chemistry
Author, co-author :
Chen, Yuesu ;  Université de Liège - ULiège > Molecular Systems (MolSys) ; Institute of Chemistry, University of Graz, NAWI Graz, Graz, Austria
Hone, Christopher A.;  Institute of Chemistry, University of Graz, NAWI Graz, Graz, Austria ; Research Center Pharmaceutical Engineering GmbH (RCPE), Graz, Austria
Gutmann, Bernhard;  Institute of Chemistry, University of Graz, NAWI Graz, Graz, Austria ; Research Center Pharmaceutical Engineering GmbH (RCPE), Graz, Austria
Kappe, C. Oliver ;  Institute of Chemistry, University of Graz, NAWI Graz, Graz, Austria ; Research Center Pharmaceutical Engineering GmbH (RCPE), Graz, Austria
Language :
English
Title :
Continuous Flow Synthesis of Carbonylated Heterocycles via Pd-Catalyzed Oxidative Carbonylation Using CO and O2 at Elevated Temperatures and Pressures
Publication date :
21 July 2017
Journal title :
Organic Process Research and Development
ISSN :
1083-6160
eISSN :
1520-586X
Publisher :
American Chemical Society
Volume :
21
Issue :
7
Pages :
1080 - 1087
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 16 January 2023

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