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Cover Picture: Carboranes as Aryl Mimetics in Catalysis: A Highly Active Zwitterionic NHC‐Precatalyst (Chem. Eur. J. 33/2017)
Author(s) -
Selg Christoph,
Neumann Wilma,
Lönnecke Peter,
HeyHawkins Evamarie,
Zeitler Kirsten
Publication year - 2017
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201701037
Subject(s) - aryl , carbene , substituent , chemistry , carborane , organocatalysis , combinatorial chemistry , catalysis , organic chemistry , enantioselective synthesis , alkyl
A new offspring of the organocatalyst family has hatched from the merger of covalent catalysis and a carborane as an aryl‐mimetic replacement: the novel zwitterionic triazolium based N‐heterocyclic carbene (NHC) precatalyst bears a 7,8‐dicarba‐ nido ‐undecaboranyl substituent (nidus ( lat .)=nest) and offers excellent activity and broad applicability in a wide range of organocatalytic transformations. The straightforward synthesis and a detailed comparison to recent aryl‐based precatalysts provides useful insights to pave the way for further development of this unprecedented class of catalysts. More information can be found in the Full Paper by K. Zeitler et al. on page 7932.