Synthesis of tetrachloroisophthalic and-terephthalic aldehydes and stable bis(nitrile oxides) based on them
作者:L. I. Belen'kii、G. P. Gromova、B. V. Lichitskii、M. M. Krayushkin
DOI:10.1007/bf02495356
日期:1997.1
A new route for the synthesis of 2,4,5,6-tetrachloroisophthalic and 2,3,5,6-tetrachloroterephthalic aldehydes from the corresponding tetrachlorobenzenes was developed. The method involves dichloromethylation of the initial compounds with chloroform in the presence of aluminum chloride and subsequent hydrolysis of the resulting 1,3-bis(dichloromethyl)-2,4,5,6-tetrachlorobenzene and 1,4-bis(dichloromethyl)-2
开发了从相应的四氯苯合成 2,4,5,6-四氯间苯二甲酸和 2,3,5,6-四氯对苯二醛的新路线。该方法包括在氯化铝存在下用氯仿对初始化合物进行二氯甲基化,然后水解所得的 1,3-双(二氯甲基)-2,4,5,6-四氯苯和 1,4-双(二氯甲基)- 2,3,5,6-四氯苯。由上述醛类通过相应的肟首次得到稳定的2,4,5,6-四氯苯-1,3-二甲腈氧化物和2,3,5,6-四氯苯-1,4-二甲腈氧化物。产物通过 IR 和 13 C NMR 光谱表征,并使用与苯乙烯的 1,3-偶极环加成反应转化为取代的 1,3- 和 1,4-亚苯基双(异恶唑啉)。