Are terminal aryl butadiynes stable? Synthesis and X-ray crystal structures of a series of aryl- and heteroaryl-butadiynes (Ar-CC-CC-H).
The synthesis and isolation are reported of a range of terminal aryl- and heteroaryl-butadiynes (ArCC-CCH) 4a-h from 2-methyl-6-(aryl/heteroaryl)hexa-3,5-diyn-2-ol precursors. The stability of 4a-h in solution is concentration dependent: many of the derivatives can be stored as dilute solutions for several days or even weeks. The X-ray crystal structures have been obtained for five ArCC-CCH derivatives [Ar = 2-(9-fluorenonyl), 4-biphenyl, 2-pyridyl, 4-pyridyl, and 2-pyrazyl].
West
Kara
K
Department of Chemistry, Durham University, Durham DH1 3LE, UK.
Wang
Changsheng
C
Batsanov
Andrei S
AS
Bryce
Martin R
MR