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594306435

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从图5-4可以看出，化合物29m在δ 13.49左右没有出现吸收峰，说明羧基消失；在δ 9.08-7.00处出现的吸收峰归属于喹啉环和苯环9个氢质子吸收峰；在δ 5.92-5.87处出现的吸收峰归属于吡喃环-CH上氢质子吸收峰，在δ 3.79处出现一个较强的单峰，归属于-OCH3上3个氢质子吸收峰；δ 3.45-3.35处出现的吸收峰，归属于吡喃环-CH2上2个氢质子吸收峰。

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1楼 2011-04-11 09:18:47

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slz146

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594306435(金币+20, 翻译EPI+1): 谢谢 2011-04-16 18:58:34

As shown in Fig.5-4 , compound 29m did not show absorption peak at about δ13.49 , this showed carboxyl group disappeared ; At δ9.08-7.00 the absorption peaks were attributed to absorption peaks which were from nine hydrogen proton on quinoline ring and benzene ring . At δ5.92-5.87 the absorption peaks were attributed to absorption peaks which were from hydrogen proton on -CH of pyrane ring , there was a comparely strong single peak at δ3.79 and it was attributed to absorption peaks of three hydrogen proton on -OCH3 , there was absorption peaks at δ 3.45-3.35 and it was attributed to absorption peaks of two hydrogen proton on –CH2 of pyrane ring .

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