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Recent Advances in the Synthesis of Quaternary Ammonium Salts via Transition‐Metal‐Catalyzed CH Bond Activation
Author(s) -
Jayakumar Jayachandran,
Cheng ChienHong
Publication year - 2018
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.201700062
Subject(s) - mesoionic , chemistry , cationic polymerization , catalysis , ammonium , salt (chemistry) , transition metal , combinatorial chemistry , organic chemistry
Highly substituted cationic heterocyclic nitrogen salts are versatile building blocks for a number of naturally occurring products and functional materials. In this paper, we review the very recently reported Co( III )‐, Rh( III )‐ and Ir( III )‐catalyzed inter‐ and intra‐molecular sp 2 CH activation/annulations with alkynes or alkenes for the synthesis of various quaternary ammonium salts containing isoquinolinium, cinnolinium, quinolizinium, mesoionic isoquinolone, 12‐azapyrene, protoberberine, indolizinium, and isoindolium salts. In addition, the reaction scope, proposed catalytic mechanisms, and applications are also included. This review will help readers to easily understand the recent advances in this field.