New Pathways for the Dual Gold-Catalyzed Cyclization of Diynes.
The reaction of thiophene-based diynes with dual-activation gold catalysts can provide cyclobutene derivatives or different polycycles by selective C-H insertion reactions. Also, the first σ,π-digold diyne complex was obtained in a stoichiometric reaction, providing insight into the dual activation mechanism. The new products were unambiguously identified by X-ray single-crystal structure analysis.
Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany), Fax: (+49) 6221-54-4205.
Svetlana
S
Tšupova
Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany), Fax: (+49) 6221-54-4205.
Max M
MM
Hansmann
Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany), Fax: (+49) 6221-54-4205.
Matthias
M
Rudolph
Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany), Fax: (+49) 6221-54-4205.
Frank
F
Rominger
Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany), Fax: (+49) 6221-54-4205. hashmi@hashmi.de.|Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia. hashmi@hashmi.de.
A Stephen K
AS
Hashmi
C−H insertion; alkynes; gold; homogeneous catalysis; thiophenes