《Tab.2 Effects of temperature and molar ratio yield》

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《"串联反应合成2-氨基-3,5-二氰基-4H-吡喃衍生物（英文）"》

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The effect of temperature on reaction efficiency was also examined（Tab.2）.The highest yield was obtained at 30℃（Entry 3）.Yields of the products decreased when temperature exceeded 30℃.At 40℃the yield dropped to 83%（Entry 5）.A brief study was performed on the equivalency of malononitrile（Entry 3 and Entries 6～7）.As shown in Tab.2，equal equivalent of malononitrile provided the best yield.