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利用Pummerer重排合成酰基—硫代半缩醛[RCOCH(OH)SCH_3],并将它们与邻苯二胺反应生成2—取代喹喔啉。
The synthetic acyl-thio hemiacetal [RCOCH (OH) SCH_3] was rearranged by Pummerer and reacted with o-phenylenediamine to give 2-substituted quinoxaline.