论文部分内容阅读
Ⅲ.桐酸甲酯所起环化作用提要β-桐酸甲酯因酸之接触作用而生成一环形異構体.此环形异构体可先经加氟作用,再经去氟化氢作用而成为芳香族化合物.此芳香族物经浓硝酸氧化后即应生成3,4——二硝基苯二甲酸及4——硝基苯二甲酸;若经高锰酸钾氧化,则得苯二甲酸.由此可知,上述之芳香族物为苯的隣位双重置换衍生物,而上述之环形异构体是环形六碳二稀.β-桐酸因热而成之异构体亦为环形构造.
Ⅲ. Effect of methyl acid on the cyclization of synothioic acid β-methyl acid ester due to the role of acid contact and the formation of a ring-shaped isomers of this ring-shaped isomers can be first by the role of fluoride, and then through the role of hydrogen fluoride Aromatics. After this aromatic by concentrated nitric acid oxidation should generate 3,4 - dinitro phthalic acid and 4 - nitrophthalic acid; if the potassium permanganate oxidation, you have phthalic acid It can be seen from the above that the aromatic is an ortho-disubstituted derivative of benzene and the above ring isomer is a cyclic hexa-dilute. The isomer of β-eleostearic acid due to heat is also an annular structure .