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Synthesis 2021; 53(24): 4672-4677
DOI: 10.1055/a-1549-0903
DOI: 10.1055/a-1549-0903
paper
Process Development of a Copper(II)-Catalyzed Dehydration of an N-Acyl Prolinal Oxime: Cascade Process and Application at an Elevated Lab Scale
We gratefully acknowledge the generous support from the Europäische Fonds für Regionale Entwicklung (EFRE) within the project “Nachhaltige Produktion von Nitril-Industriechemikalien” (Grant no. EFRE-0400138).
Abstract
Chiral N-acyl amino nitriles are important structural motifs in several pharmaceuticals such as Vildagliptin or Saxagliptin. Cyanide-free access to such nitriles is provided by a copper-catalyzed dehydration of oximes, which are readily available by condensation of chiral aldehydes resulting from the chiral pool with hydroxylamine. The application in a cascade process without the need for intermediate purification as well as a demonstrated scalability show the robustness of this methodology.
Key words
aldoximes - cyanide-free nitrile synthesis - dehydration - N-acylaminonitriles - cascade processSupporting Information
- Supporting information for this article is available online at https://doi.org/10.1055/a-1549-0903.
- Supporting Information
Publication History
Received: 22 April 2021
Accepted after revision: 13 July 2021
Accepted Manuscript online:
13 July 2021
Article published online:
23 September 2021
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