Halogeno-o-phenylenediamines and derived heterocycles. Part II. Hydrodechlorination of chloroquinoxalines
作者:D. E. Burton、D. Hughes、G. T. Newbold、J. A. Elvidge
DOI:10.1039/j39680001274
日期:——
Treatment of 5,6,8-trichloro-7-methylquinoxaline (II) with alkali in aqueous ethanol gives 5,8-dichloro-6-methyl-quinoxaline (III) cleanly in good yield. 5,6,7,8-Tetrachloroquinoxaline similarly, though less satisfactorily, yields 5,6,8-trichloroquinoxaline and 5,8-dichloroquinoxaline. Further experiments with a bearing on the course of these reactions are described and a possible mechanism is discussed
在乙醇水溶液中用碱处理5,6,8-三氯-7-甲基喹喔啉(II),可干净地以良好的收率得到5,8-二氯-6-甲基喹喔啉(III)。5,5,6,7,8-四氯喹喔啉类似地,尽管不太令人满意,但是产生5,6,8-三氯喹喔啉和5,8-二氯喹喔啉。描述了与这些反应的过程有关的进一步实验,并讨论了可能的机理。