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Recent Developments in Dehydrogenative Organic Transformations Catalyzed by Homogeneous Phosphine‐Free Earth‐Abundant Metal Complexes
Author(s) -
Takallou Ahmad,
Mesgarsaravi Niloofar,
Beigbaghlou Somayyeh Sarvi,
Sakhaee Nader,
Halimehjani Azim Ziyaei
Publication year - 2021
Publication title -
asian journal of organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.846
H-Index - 44
eISSN - 2193-5815
pISSN - 2193-5807
DOI - 10.1002/ajoc.202000631
Subject(s) - dehydrogenation , phosphine , chemistry , catalysis , ligand (biochemistry) , homogeneous , homogeneous catalysis , stoichiometry , metal , transition metal , hydrogen , combinatorial chemistry , organic chemistry , physics , thermodynamics , biochemistry , receptor
Stoichiometric amounts of various oxidants have long been employed for the oxidation of organic compounds. The major drawback of this method is the amount of toxic waste produced, which is in sharp contrast to principles of green chemistry. In catalytic dehydrogenation pathways, hydrogen carrier organic compounds (HCOCs) containing O−H, C−H, and N−H bonds can be transformed to their oxidized forms by removing two hydrogen atoms from the starting materials. Among the homogeneous transition metal‐ligand complexes that have been applied in a catalytic dehydrogenative approach, phosphine ligands have frequently been used. Over the past decades, phosphine‐free ligand systems have since been developed and implemented in various organic reactions to overcome the drawbacks associated with phosphine‐based catalysts. The aim of this review is to summarize the use of non‐phosphinic ligand‐metal complexes in organic transformations proceeding by a dehydrogenative pathway.