A Facile Oxidation and Oxygen Insertion of the Cyclopentadiene Ring by Molecular Oxygen in Solution
作者:Wei-Tao Gong、Gui-Ling Ning、Xin-Cheng Li、Li Wang、Yuan Lin
DOI:10.1021/jo050715q
日期:2005.7.1
Oxidation of substituted cyclopentadienes by molecular oxygen afforded the corresponding pyryliumcations in acidic solution, whereby an oxygen atom was inserted into the cyclopentadiene ring. This novel one-step reaction proceeds in a different yield depending on substitutionpatterns of the cyclopentadiene. A possible reaction pathway and formation mechanism of the pyryliumcation are proposed and
One-Pot Synthesis of α-Monosubstituted Pyridiniums from Corresponding Pyrylium Salts
作者:Gang Li、Wei-Tao Gong、Jun-Wei Ye、Yuan Lin、Gui-Ling Ning
DOI:10.1080/00397911.2010.525775
日期:2012.2.15
Abstract α-monosubstituted pyridiniums were readily prepared by the one-pot reaction of their corresponding pyryliumsalts and primary amines. This result shows that such kind of pyridiniums can be prepared via this route. It was proved that the number of phenyl groups at the pyrylium ring had a crucial effect on this one-pot synthetic route. GRAPHICAL ABSTRACT
Unprecedented intramolecular cyclization of pyridinium to pyrido[1,2-a]benzimidazole: a novel chemodosimeter for fluoride ions
作者:Gang Li、Wei-Tao Gong、Jun-Wei Ye、Yuan Lin、Gui-Ling Ning
DOI:10.1016/j.tetlet.2011.01.057
日期:2011.3
Pyridinium 1a underwent an efficient intramolecularcyclization initiated by fluoride ions to form highly fluorescent 1,3,4-triphenylpyrido[1,2-a]benzimidazole, providing a novel chemodosimeter for fluoride ions detection.
吡啶鎓1a经过有效的分子内环化反应,由氟化物离子形成高荧光的1,3,4-三苯基吡啶并[1,2- a ]苯并咪唑,为检测氟离子提供了一种新型的化学计量器。
Heterocyclic Radical Mediated Synthesis and Fluorescence Properties of Conjugated Polyene Ketones
作者:Xiangdong Zhang、Junwei Ye、Suning Wang、Weitao Gong、Yuan Lin、Guiling Ning
DOI:10.1021/ol201207b
日期:2011.7.15
A straightforward route for the preparation of decatetraene diketone derivates is presented. The synthesis has been accomplished by a one-step procedure starting from phenyl-substituted pyrylium perchlorates, and an elaborate heterocyclic α-radical mechanism was proposed. This class of molecules displays a crystallization induced emission enhancement property.
Unprecedented Ring Transformation of an α,α′-Monosubstituted 2,4,5-Triphenylpyrylium Salt with η<sup>3</sup>-Phosphines: Efficient Synthesis of Aryl- and Alkylphosphonium Triphenylcyclopentadienylides
作者:Tao Xu、Wei-tao Gong、Jun-wei Ye、Yuan Lin、Gui-ling Ning
DOI:10.1021/om100872f
日期:2010.12.27
The ring transformation of the alpha reactive 2 4 5 triphenylpyrylium salt 1 with eta(3) phosphines to the aryl and alkylphosphonium triphenylcyclopentadienylides 5 is reported The mechanism of this unprecedented transformation might involve tandem conjugate addition and intramolecular Wittig cyclization