Tandem Friedel−Crafts Annulation to Novel Perylene Analogues
摘要:
[GRAPHICS]Novel dialkyloxy- and dihydroxyoctahydroperylenes are regioselectively available via a new tandem Friedel-Crafts alkylation of tetrahydronaphthalene precursors followed by oxidative aromatization. Heating of 5-alkyloxy-1-tetralol with p-toluenesulfonic acid in sulfolane gave the corresponding octahydroperylenes in moderate yields. Studies with Lewis acids and tetralin-1,5-diol in acetonitrile at room temperature provided the 4,10-dihydroxy analogue cleanly, albeit in reduced yields. Examples of these new series of perylene analogues were partially oxidized to the corresponding contiguously aromatic, anthracene core products or fully aromatized to 3,9-dialkyloxyperylenes in good yields.
Tandem Friedel−Crafts Annulation to Novel Perylene Analogues
摘要:
[GRAPHICS]Novel dialkyloxy- and dihydroxyoctahydroperylenes are regioselectively available via a new tandem Friedel-Crafts alkylation of tetrahydronaphthalene precursors followed by oxidative aromatization. Heating of 5-alkyloxy-1-tetralol with p-toluenesulfonic acid in sulfolane gave the corresponding octahydroperylenes in moderate yields. Studies with Lewis acids and tetralin-1,5-diol in acetonitrile at room temperature provided the 4,10-dihydroxy analogue cleanly, albeit in reduced yields. Examples of these new series of perylene analogues were partially oxidized to the corresponding contiguously aromatic, anthracene core products or fully aromatized to 3,9-dialkyloxyperylenes in good yields.
Tandem Friedel−Crafts Annulation to Novel Perylene Analogues
作者:Mark A. Penick、Mathew P. D. Mahindaratne、Robert D. Gutierrez、Terrill D. Smith、Edward R. T. Tiekink、George R. Negrete
DOI:10.1021/jo800558c
日期:2008.8.1
[GRAPHICS]Novel dialkyloxy- and dihydroxyoctahydroperylenes are regioselectively available via a new tandem Friedel-Crafts alkylation of tetrahydronaphthalene precursors followed by oxidative aromatization. Heating of 5-alkyloxy-1-tetralol with p-toluenesulfonic acid in sulfolane gave the corresponding octahydroperylenes in moderate yields. Studies with Lewis acids and tetralin-1,5-diol in acetonitrile at room temperature provided the 4,10-dihydroxy analogue cleanly, albeit in reduced yields. Examples of these new series of perylene analogues were partially oxidized to the corresponding contiguously aromatic, anthracene core products or fully aromatized to 3,9-dialkyloxyperylenes in good yields.
The photophysical characterisation of novel 3,9-dialkyloxy- and diacyloxyperylenes
作者:John F. Fuini、Anand B. Surampudi、Mark A. Penick、Mathew P.D. Mahindaratne、George R. Negrete、Lorenzo Brancaleon
DOI:10.1016/j.dyepig.2010.06.009
日期:2011.2
The fundamental photophysical properties of three symmetrically substituted 3,9-perylene analogues were examined in a diverse range of solvents. All three compounds exhibited solvent-dependent fluorescence quantum yield, which was lower than that of perylene or its diimides. Whilst the absence of a large excited state dipole moment suggests that there is no preferential charge accumulation in one side of the molecules, the data suggest that intramolecular electron transfer occurs and that such an event causes additional photochemical mechanisms in chlorinated compounds where the fluorescence quantum yield is lower than in all other solvents and the values of the fluorescence decay change significantly. The dyes could be an interesting new class of fluorescence tags for labeling biomolecules and as dyes for organic photovoltaic materials. (C) 2010 Elsevier Ltd. All rights reserved.