Organophotocatalyzed E and Z stereoselective Csp3-Csp2 bond forming cross coupling reactions of carboxylic acids with β-aryl-vinyl halides

He Huang, Yueteng Zhang, Peng Ji, Patrick S. Mariano, Wei Wang

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Owing to their importance in organic synthesis, transition metal catalyzed cross-coupling reactions have been the focus of many studies. Recently, it was recognized that merged transition metal and photoredox catalysis is a powerful strategy for the design of challenging Csp3-Csp2 bond forming cross coupling reactions. However, these reactions require metals (e.g., Ni) to activate Csp2-halogen bonds. In the current investigation, we developed a new, photocatalysis based, metal free approach to accomplish Csp3-Csp2 bond formation between an alkyl fragment, derived from a carboxylic acid, and a vinyl moiety of a,β-aryl-substituted vinyl halide. The cross coupling process, which is activated by using the simple organic dye 4CzIPN, acting as a single electron transfer type photocatalyst, and visible light, is chemoselective, E-stereoselective and efficient. Moreover, upon prolonged irradiation of the reaction mixture, 4CzIPN serving as an energy transfer photocatalyst, promotes isomerization of the initially formed alkenes into mixtures enriched in the Z-isomers.

Original languageEnglish (US)
Pages (from-to)27-31
Number of pages5
JournalGreen Synthesis and Catalysis
Volume2
Issue number1
DOIs
StatePublished - Feb 2021
Externally publishedYes

Keywords

  • Cross-coupling reaction
  • Organocatalysis
  • Photochemistry
  • Photoredox
  • Synthetic methods

ASJC Scopus subject areas

  • Biotechnology
  • Catalysis

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