| Literature DB >> 29712370 |
Matthew Laskoski1, Gaby Roidl1, Mark D Smith1, Uwe H F Bunz1.
Abstract
A metamorphosis of the tetraethynyl precursor 1 through double Cu-catalyzed ring closure leads to the corresponding butterfly-shaped cyclobutadiene complexes 2 in high yield (94 %). Single-crystal X-ray diffraction shows that the large organic ligand is distinctly nonplanar with a concave topology. Cp=cyclopentadiene.Entities:
Keywords: C−C coupling; alkyne complexes; alkynes; cobalt; macrocycles
Year: 2001 PMID： 29712370 DOI： 10.1002/1521-3773(20010417)40:8<1460::AID-ANIE1460>3.0.CO;2-Q
Source DB: PubMed Journal: Angew Chem Int Ed Engl ISSN： 1433-7851 Impact factor: 15.336