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Carboxylation of Terminal Alkynes with Carbon Dioxide Catalyzed by an In Situ Ag 2 O/N‐Heterocyclic Carbene Precursor System
Author(s) -
Yuan Ye,
Chen Cheng,
Zeng Cheng,
Mousavi Bibimaryam,
Chaemchuen Somboon,
Verpoort Francis
Publication year - 2017
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201601379
Subject(s) - carboxylation , carbene , catalysis , adduct , substrate (aquarium) , chemistry , carbon dioxide , solubility , salt (chemistry) , in situ , combinatorial chemistry , organic chemistry , oceanography , geology
A carboxylation of terminal alkynes with carbon dioxide (CO 2 ) at ambient conditions was developed in situ using a series of N‐heterocyclic carbene (NHC) precursors and Ag 2 O. The unique structure of NHCs largely increases the solubility of active Ag species and meanwhile activates CO 2 by forming the NHC–CO 2 adduct. This novel catalytic system demonstrated quite low Ag loading, very high activities, wide substrate generality and excellent tolerance for a variety of functionalities. In addition, avoiding cumbersome synthesis procedures, processing, and reserving of the photosensitive Ag complex, this system could be stored and operated as straightforward as the inorganic Ag salt catalysts.