Photochemical transformations. 39. Effects of ring substituents and leaving groups on photo-Wagner-Meerwein rearrangements and their ground-state analogs
Synthesis of anthracene ethers from anthracene methyl ethers via an acid-catalyzed exchange reaction
作者:Chih-Hsiu Lin、Krishnan Radhakrishnan
DOI:10.1039/b412090f
日期:——
Selective synthesis of anthracene ethers was achieved under mild conditions via an acid-catalyzed ether-ether exchangereaction and its scope and limitations, as well as its potential in synthesizing anthracene-based crown ethers, tested.
Photochemical transformations. 35. Stereochemistry of electron transfer from photoexcited aromatic rings to carbon-chlorine bonds. Syn stereochemistry of migration in photo-Wagner-Meerwein rearrangements
作者:Stanley J. Cristol、Dave G. Seapy、Ellen O. Aeling
DOI:10.1021/ja00363a022
日期:1983.11
and are rationalized by the Weller equation. Separation of chloride ion from the presumed zwitterionic biradical is accompanied by ''Wagner-Meerwein'' rearrangement but is predominately syn, rather than anti as in the ground state. The rearrangement stereochemistry is consistent with the idea that, in the principal photochemical process, migration with retention of configuration is concerted with the
Different synthetic routes towards efficient organogelators: 2,3-substituted anthracenes
作者:Jean-Luc Pozzo、Gilles M. Clavier、Michel Colomes、Henri Bouas-Laurent
DOI:10.1016/s0040-4020(97)00297-4
日期:1997.5
synthetic approaches towards 2,3-substituted anthracenes are reported and discussed in terms of selectivity and viability. This allowed us to introduce a variety of substituents as sidearms. Promising results have been found using a tandem Diels-Alder aromatization reaction using 2,3-dimethoxybutadiene 9 as a key intermediate. However, for multigram preparations the Friedel-Crafts approach is preferred
Synthesis, structures, and properties of peripheral o-dimethoxy-substituted pentiptycene quinones and their o-quinone derivatives
作者:Jing Cao、Hai-Yan Lu、Chuan-Feng Chen
DOI:10.1016/j.tet.2009.07.090
日期:2009.9
microporous structure in the solid state. For the pentiptycene quinones containing the dimethoxybenzene unit(s) and the quinone group(s) simultaneously, interesting intramolecular charge transfer interactions and electrochemical properties were also shown. These peripheral-substituted pentiptycene quinones and their o-quinone derivatives can be used as new useful building blocks and will find wide applications
A novel pentiptycene-based bis(crownether) host incorporating two dibenzo-24-crown-8 ether moieties has been synthesized, and its efficient complexation ability toward cyclobis(paraquat-p-phenylene) in solution and in the solid state has been explored.