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Metal Carbene Dimerization: Versatile Approach to Polyalkynylethenes
Author(s) -
Barluenga José,
de Sáa Diana,
Gómez Aránzazu,
Ballesteros Alfredo,
Santamaría Javier,
de Prado Ana,
Tomás Miguel,
SuárezSobrino Angel L.
Publication year - 2008
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200801584
Subject(s) - carbene , stereoselectivity , metal , chemistry , conjugated system , potassium , combinatorial chemistry , stereochemistry , medicinal chemistry , organic chemistry , catalysis , polymer
Heads or tails? Chemo‐, regio‐, and stereoselective access to cross‐ and linear conjugated poly‐ynene scaffolds from alkynyl‐derived group six metal carbenes is reported. The metal carbenes shown (M=Cr, W; TIPS=triisopropylsilyl) readily undergo low‐temperature, tail‐to‐tail dimerization in the presence of potassium tert ‐butoxide by reaction at either of the C β atoms to provide E ‐polyalkynylethenes.