AbstractSubstituted 2H-1,3-benzothiazines and 2,3-dihydro-1,4-benzothiazepines react with dimethyl acetylenedicarboxylate in aqueous methanol to give new, unexpected condensed-skeleton heterocycles. The structures of the new compounds were determined by 1H and 13C nuclear magnetic resonance (NMR), two-dimensional (2D) heteronuclear multiple-bond correlation (HMBC), infrared (IR), and for one derivative
摘要取代的2 H -1,3-苯并
噻嗪和2,3-二氢-1,4-苯并
硫氮杂s与乙酰二
羧酸二甲酯在
甲醇水溶液中反应,生成新的,意想不到的稠骨架杂环。新化合物的结构由1 H和13 C核磁共振(NMR),二维(2D)异核多键相关(HMBC),红外(IR)以及对于一种衍
生物的X射线确定分析。 图形概要