A surprising formation of novel bridged bis-benzimidazoles by oxidation of diaminoquinoxalines

Pre?ler J.; Beckert R.; Rau S.; Menzel R.; Birckner E.; Günther W.; G?rls H.

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A surprising formation of novel bridged bis-benzimidazoles by oxidation of diaminoquinoxalines

机译：通过二氨基喹喔啉的氧化令人惊讶地形成新型桥联双苯并咪唑

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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.

机译：描述了由2，3-二芳基氨基喹喔啉经氧化环化级联反应合成的新型六环双苯并咪唑6。这些非常稳定和高熔点的衍生物的特征在于它们在可见光谱的蓝色区域具有强荧光。 2,3-二氯喹喔啉和1,2-苯二胺之间的环化反应不会产生6型衍生物。在这种情况下，仅定量分离了氟黄烷7。

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《Zeitschrift fur Naturforschung, B. A Journal of Chemical Sciences》 |2012年第4期|共6页
作者
Pre?ler J.; Beckert R.; Rau S.; Menzel R.; Birckner E.; Günther W.; G?rls H.;
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正文语种 eng
中图分类化学;
关键词
Bis-benzimidazoles; Fluorophores; Ortho-annulation; Quinoxalines;

机译：双苯并咪唑;荧光团;邻位取消;喹喔啉;

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A surprising formation of novel bridged bis-benzimidazoles by oxidation of diaminoquinoxalines

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