以下为句子列表：
英文: Abstract: The phenyl Lithium, 2-methoxy phenyl Lithium and 2,4-dimethoxy phenyl Lithium reacted with the cinnamic acid to produce a corresponding chalcone in 75%, 56%, 50%yield, respectively. 2,6-Dimethoxyphenyl Lithium could not react with cinnamic acid,
中文: 文摘:苯基锂、2-甲氧基苯基锂和2，4-二甲氧苯基锂分别与肉桂酸反应以75％，65％，50％的收率生成相应的查尔酮；2，6-二甲氧基苯基锂与肉桂酸不发生反应，但能与肉桂酸甲酯反应生成2′，6′-二甲氧基查尔酮；类似的还制得了2′，4′，6′-三甲氧基查尔酮和2′，4′，4，6′-四甲氧基查尔酮。
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英文: Hydroxyquinol triacetate was prepared from p-benzoquinone by 1,4-addition reaction with acetic anhydride and then 6,7-dihydroxy coumarin was synthesized from it by hydrolyze and cyclization in concentrated sulfuric acid.Then 6,7-dimethoxy coumarin was syn
中文: 对苯醌与乙酸酐经1,4-加成生成1,2,4-苯三酚三乙酸酯,然后与苹果酸反应经水解、环合反应得6,7-二羟基香豆素,再经甲基化得到6,7-二甲氧基香豆素,总收率为74.4%,整个过程反应条件温和,操作方便,适合工业生产的要求,对产品结构进行了IR和1HNMR表征。
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