(Aza)Acenes Share the C2 Bridge with (Anti)Aromatic Macrocycles: Local vs. Global Delocalization Paths
作者:Krzysztof Bartkowski、Miłosz Pawlicki
DOI:10.1002/anie.202011848
日期:2021.4.12
a crucial role in tuning of the properties that would be showing a dependence on the efficiency of π‐electrons coupling. The π‐cloud available in the final structure can be drastically influenced by a side‐ or a linear fusion of unsaturated and conjugated hydrocarbons. The linear welding of naphthalene/anthracene or quinoxaline/benzo[g]quinoxaline with triphyrin(2.1.1) gives structures where the competition
Electron-deficient thiophene dioxides have been found to react rapidly with a bicyclo[6.1.0]non-4-yne derivative to afford benzocyclooctenes in excellent yields. Thiophene dioxides bearing a clickable functional group served as efficient bisreactive platform molecules that enabled sequential molecular conjugation in a simple operation.
6-Azulyne, the first azulyne to be prepared, has been trapped with furan to give an adduct whose crystal structure reveals marked bondalternation in the azulene π system. The double bond in the furan moiety is responsible in part for the bond localization, as hydrogenation of that bond attenuates the effect. The regiochemistry of electrophilic attack on the adduct has been examined briefly, with results contrary
Layeredelectronacceptors D1–4 equipped with terminal 1,2,5‐thiadiazole groups have been constructed using a one‐pot protocol of acenedimerization. Their molecular structures are determined using single‐crystal X‐ray diffraction analysis. Photophysical and electrochemical properties of these molecules present a marked dependence on conjugation length and molecular geometry. An aggregation‐induced
An efficient synthesis of substituted anthraquinones and naphthoquinones
作者:David Bailey、Vance E. Williams
DOI:10.1016/j.tetlet.2004.02.010
日期:2004.3
An efficientsynthesis of 6,7-disubstituted naphthoquinones and 2,3,6,7-tetrasubstituted anthraquinones were developed using the reaction of thiophene dioxides and benzoquinone and naphthoquinone derivatives, respectively.