Synthesis of some new 3,7-bisubstituted dibenzobromolium salts

Abstract

3,7-Dinitrodibenzobromolium bisulfate was prepared directly by reaction of 4,4-dinitrobiphenyl with sodium bromide and potassium persulfate in concentrated sulfuric acid. Reduction of 3,7-dinitrobenzobromolium bisulfate with SnCl2-HCl gave 3,7-diaminodibenzobromolium chloride I. Reactions of the diazo-salt solution obtained by diazotization of I, with Cu2Cl2, Cu2Br2, and KI gave 3,7-dichlorodibenzobromolium chloride, 3,7-dibromodibenzobromolium bromide, and 3,7-diiododibenzobromolium iodide, resp. Structures of these new compounds were established by 1H NMR, MS and IR spectra.

Key words: INFRARED SPECTROPHOTOMETRY, SULFURIC ACID, MASS SPECTROGRAPHY, PROTON MAGNETIC RESONANCE SPECTROMETRY, DIAZOTIZATION, POTASSIUM PERSULFATE, SODIUM BROMIDE

CLC Number:

O627

Cite this article

HOU ZIJIE. Synthesis of some new 3,7-bisubstituted dibenzobromolium salts[J]. Acta Chimica Sinica, 1995, 53(1): 94-97.

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几种新的3,7-二取代二苯并五元环状溴嗡盐的合成