[en] The oxidation of various N,N′-diarylbenzene-1,2-diamines bearing bulky aromatic substituents with sodium periodate on wet silica gel afforded a series of five new dihydrophenazines instead of the expected cyclohexadiene-1,2-diimines. The reaction most likely proceeds via a 1,6-electrocyclic path and provides a convenient access to an important class of nitrogen heterocycles. Subsequent treatment of the mesityl derivative with chloromethyl pivalate and silver triflate led to the corresponding benzimidazolium salt.
Disciplines :
Chemistry
Author, co-author :
Borguet, Yannick ; Université de Liège - ULiège > Département de chimie (sciences) > Chimie macromoléculaire et catalyse organique
Zaragoza, Guillermo
Demonceau, Albert ; Université de Liège - ULiège > Département de chimie (sciences) > Chimie macromoléculaire et catalyse organique
Delaude, Lionel ; Université de Liège - ULiège > Département de chimie (sciences) > Chimie organométallique et catalyse homogène
Language :
English
Title :
An Unexpected Synthesis of Dihydrophenazines en Route to Benzimidazolium Salts
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