A Surprising Formation of Novel Bridged Bis-Benzimidazoles by Oxidation of Diaminoquinoxalines

被引：5

作者：

Pressler, Jens ^{[1
]}

Beckert, Rainer ^{[1
]}

Rau, Sven ^{[4
]}

Menzel, Roberto ^{[1
]}

Birckner, Eckhard ^{[2
]}

Guenther, Wolfgang ^{[1
]}

Goerls, Helmar ^{[3
]}

机构：

[1] Univ Jena, Inst Organ & Makromol Chem, D-07743 Jena, Germany

[2] Univ Jena, Inst Phys Chem, D-07743 Jena, Germany

[3] Univ Jena, Inst Anorgan & Analyt Chem, D-07743 Jena, Germany

[4] Univ Ulm, Inst Anorgan Chem 1, D-89081 Ulm, Germany

来源：

ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES | 2012年 / 67卷 / 04期

关键词：

Bis-Benzimidazoles; ortho-Annulation; Quinoxalines; Fluorophores; METAL-COMPLEXES; MINOR-GROOVE; DERIVATIVES; FLUORESCENT;

D O I：

10.5560/ZNB.2012.67b0367

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A synthesis of novel hexacyclic bis-benzimidazoles 6 starting from 2,3-diarylamino-quinoxalines via an oxidative cyclization cascade is described. These very stable and high-melting derivatives are featured by their strong fluorescence in the blue region of the visible spectrum. The cyclization reaction between 2,3-dichloroquinoxaline and 1,2-phenylenediamine did not lead to derivatives of type 6. In this case, only fluoflavine 7 was isolated quantitatively.

引用

页码：367 / 372

页数：6

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