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Expanded‐Ring N ‐Heterocyclic Carbenes Efficiently Stabilize Gold(I) Cations, Leading to High Activity in π‐Acid‐Catalyzed Cyclizations
Author(s) -
Morozov Oleg S.,
Lunchev Andrey V.,
Bush Alexander A.,
Tukov Aleksandr A.,
Asachenko Andrey F.,
Khrustalev Victor N.,
Zalesskiy Sergey S.,
Ananikov Valentine P.,
Nechaev Mikhail S.
Publication year - 2014
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201303760
Subject(s) - carbene , chemistry , catalysis , tetrafluoroborate , cationic polymerization , ring (chemistry) , medicinal chemistry , indole test , ionic liquid , ionic bonding , stereochemistry , polymer chemistry , organic chemistry , ion
A series of six‐ and seven‐membered expanded‐ring N ‐heterocyclic carbene (er‐NHC) gold(I) complexes has been synthesized using different synthetic approaches. Complexes with weakly coordinating anions [(er‐NHC)AuX] (X − =BF 4 − , NTf 2 − , OTf − ) were generated in solution. According to their 13 C NMR spectra, the ionic character of the complexes increases in the order X − =Cl −