A natural light induced regioselective 6π-electrocyclisation–oxidative aromatisation reaction: experimental and theoretical insights
作者:Benjamin E. Moulton、Hao Dong、Ciara T. O'Brien、Simon B. Duckett、Zhenyang Lin、Ian J. S. Fairlamb
DOI:10.1039/b811284c
日期:——
Stoichiometric intermolecular Pauson-Khand reactions of 4-(phenylethynyl)-6-methyl-2-pyrones with norbornene and dicobalt(0)octacarbonyl provide cyclopentenone products that undergo a facile 6pi-electrocyclisation-oxidative aromatisation transformation in the presence of natural light and oxygen, affording functionalised benzo[h]indeno[1,2-f]isochromene type products. The results are rationalised by