Rhodium(II)-Catalyzed Annulation of Azavinyl Carbenes Through Ring-Expansion of 1,3,5-Trioxane: Rapid Access to Nine-Membered 1,3,5,7-Trioxazonines

Jola Pospech, Raffaella Ferraccioli, Helfried Neumann, Matthias Beller

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

The rhodium(II)-catalyzed denitrogenative coupling of N-alkylsulfonyl 1,2,3-triazoles with 1,3,5-trioxane led to nine-membered-ringed trioxazonines in moderate-to-good yields. 1,3,5-Trioxane, acting as an oxygen nucleophile, reacted with the α-aza-vinylcarbene intermediate, giving rise to ylide formation, which was probably the key step in the reaction. Triazoles that contained aryl substituents with various electronic and steric features on the C4 carbon atom were well-tolerated. The synthesis of trioxazonine derivatives was achieved through a one-pot, two-step procedure from 1-mesylazide and a terminal alkyne by combining Cu I -catalyzed 1,3-dipolar cycloaddition and rhodium-catalyzed transformations.

Original languageEnglish
Pages (from-to)2624-2630
Number of pages7
JournalChemistry - An Asian Journal
Volume10
Issue number12
DOIs
StatePublished - 1 Dec 2015
Externally publishedYes

Keywords

  • annulation
  • carbenes
  • heterocycles
  • rhodium
  • ring expansion

Fingerprint

Dive into the research topics of 'Rhodium(II)-Catalyzed Annulation of Azavinyl Carbenes Through Ring-Expansion of 1,3,5-Trioxane: Rapid Access to Nine-Membered 1,3,5,7-Trioxazonines'. Together they form a unique fingerprint.

Cite this