Structurally Well-Defined PC(sp3)P Osmium Pincer Catalysts for Methylation of Alcohols, Indoles, Phenols, and Sulfonamides Using Methanol as a C1 Source

Nandita Biswas, Dmitri Gelman*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Recent findings show pincer catalysts of osmium superior in a broad spectrum of synthetically valuable transformations. This article reports structurally well-defined Os(II)PCsp3P complexes stabilized by a functional dibenzobarrelene-based pincer ligand. We describe their organometallic and catalytic properties in the hydride transfer reactions. We demonstrate that the osmium center, covalently locked within the 3-dimensional ligand pocket, exhibits strictly predictable coordination behavior and redox rigidity while remaining catalytically active owing to the potential cooperation with a proximate functional side arm. The described Os(II)PCsp3P complexes were found as superior catalysts in the mild and selective methylation of alcohols, indoles, phenols, and sulfonamides using methanol as a C1 source.

Original languageAmerican English
Pages (from-to)1629-1638
Number of pages10
JournalACS Catalysis
Volume14
Issue number3
DOIs
StatePublished - 2 Feb 2024

Bibliographical note

Publisher Copyright:
© 2024 American Chemical Society.

Keywords

  • C-carbometalated
  • cooperative catalysis
  • noninnocent ligands
  • osmium
  • pincer complexes

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