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2-(4-叔丁基苯氧甲基)-3-喹啉酸(1a ～1d),在多聚磷酸(PPA)的作用下发生分子内的闭环反应和脱叔丁基反应,得到了不含有叔丁基的苯并杂卓并喹啉酮化合物(2a ～2c)。它们的结构通过红外光谱、核磁共振氢谱、质谱和元素分析得以证实。
(1a ~ 1d) 2- (4-tert-butylphenoxymethyl) -3-quinolinic acid undergo intramolecular ring closure and de-t-butyl reaction under the action of polyphosphoric acid (PPA) Benzoheteroquinolone compounds (2a to 2c) not containing tert-butyl group. Their structure was confirmed by IR, 1H NMR, MS and elemental analysis.