title: Gold(III)- versus gold(I)-induced cyclization: synthesis of six-membered mesoionic carbene and acyclic (aryl)(heteroaryl) carbene complexes.
abstract: The golden state: selective 5-exo- and 6-endo-cyclizations of an alkynyl benzothioamide have been achieved. The selectivity is controlled by the oxidation state of the gold precursor (+I or +III), yielding two new types of carbene ligand: an (aryl)(heteroaryl)carbene and a six-membered mesoionic carbene. Mes=2,4,6-trimethylphenyl.
authors.affiliation: UCSD-CNRS Joint Research Chemistry Laboratory, Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, 92093-0343, USA.
authors.forename: Gaël
authors.initials: G
authors.lastname: Ung
authors.forename: Michele
authors.initials: M
authors.lastname: Soleilhavoup
authors.forename: Guy
authors.initials: G
authors.lastname: Bertrand
mesh_terms: D002384:Catalysis; D003500:Cyclization; D006046:Gold / Q000737:chemistry*; D008697:Methane / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000737:chemistry; D013237:Stereoisomerism
chemical_list: C030011:carbene; D006046:Gold; D008697:Methane