Synthesis and properties of butatrienes containing a bisdehydro[13]annulene system as terminal groups
作者:Masahiko Iyoda、Shigeyoshi Tanake、Kazuhiko Nishioka、Masaji Oda
DOI:10.1016/s0040-4039(00)88044-2
日期:1983.1
The compounds bearing a butatriene linkage between bisdehydro[13]annulene and electron donating and withdrawing systems have been synthesized. The contribution of a dipolar structure in these compounds is discussed on the basis of the spectral data.
The catalytic partial hydrogenation of the 5,10-dimethyl-6,8-bisdehydro[13]annulenone using Pd–BaSO4 afforded the 5,10-dimethyl[13]annulenone together with two isomeric 5,10-dimethyl-6-dehydro[13]annulenones. The dimethyl[13]annulenone, which is the first example of a monocyclic non-dehydro annulenone derivative largerthantropone, was found to be atropic on the basis of 1H NMR spectra. Molecular mechanics