Cyclotrimerization of alkynes catalyzed by a self-supported cyclic tri-nuclear nickel(0) complex with α-diimine ligands

Lingyi Shen, Yanxia Zhao, Qiong Luo, Qian Shu Li, Bin Liu, Carl Redshaw, Biao Wu, Xiao Juan Yang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)
Plum Print visual indicator of research metrics
  • Citations
    • Citation Indexes: 15
  • Captures
    • Readers: 20
see details

Abstract

A cyclic tri-nuclear α-diimine nickel(0) complex [{Ni(μ-L Me-2,4 )} 3 ] (2) was synthesized from a “pre-organized”, trimerized trigonal LNiBr 2 -type precursor [Ni 32 -Br) 33 -Br) 2 (L Me-2,4 ) 3 ]·Br (1; L Me-2,4 = [(2,4-Me 2 C 6 H 3 )NC(Me)] 2 ). In complex 2, the α-diimine ligands not only exhibit the normal N,N′-chelating mode, but they also act as bridges between the Ni atoms through an unusual π-coordination of a C═N bond to Ni. Complex 2 is able to catalyze the cyclotrimerization of alkynes to form substituted benzenes in good yield and regio-selectivity for the 1,3,5-isomers, which is found to vary with the nature of the alkyne employed. This complex represents a convenient self-supported nickel(0) catalyst with no need for additional ligands and reducing agent.

Original languageEnglish
Pages (from-to)4643-4649
Number of pages7
JournalDalton Transactions
Volume48
Issue number14
DOIs
Publication statusPublished - 2019
Externally publishedYes

Fingerprint

Dive into the research topics of 'Cyclotrimerization of alkynes catalyzed by a self-supported cyclic tri-nuclear nickel(0) complex with α-diimine ligands'. Together they form a unique fingerprint.

Cite this

Shen, L., Zhao, Y., Luo, Q., Li, Q. S., Liu, B., Redshaw, C., Wu, B., & Yang, X. J. (2019). Cyclotrimerization of alkynes catalyzed by a self-supported cyclic tri-nuclear nickel(0) complex with α-diimine ligands. Dalton Transactions, 48(14), 4643-4649. https://doi.org/10.1039/c9dt00819e