作者:Zheng Li、Yulin Xing
DOI:10.1007/s11164-012-0538-5
日期:2012.11
An efficient synthetic method for heterocycles containing both carbazole and 1,3,4-thiadiazole moieties is described. 9-Ethyl-9H-carbazol-3-carbaldehyde reacted with 4-arylthiosemicarbazides, with acetic acid as catalyst, to give 1-(9-ethyl-9H-carbazol-3-yl)methylene-4-arylthiosemicarbazides, which were further treated with manganese dioxide at room temperature in acetone to give 5-(9-ethyl-9H-carbazol-3-yl)-N-aryl-1,3,4-thiadiazol-2-amines in good to high yield. This procedure has the advantages of mild conditions, easy separation, and simple manipulation.
本论文介绍了一种高效合成同时含有咔唑和 1,3,4-噻二唑分子的杂环的方法。以乙酸为催化剂,9-乙基-9H-咔唑-3-甲醛与 4-芳基硫代氨基脲反应,得到 1-(9-乙基-9H-咔唑-3-基)亚甲基-4-芳基硫代氨基脲,在丙酮中室温下进一步用二氧化锰处理,得到 5-(9-乙基-9H-咔唑-3-基)-N-芳基-1,3,4-噻二唑-2-胺,收率从好到高。该方法具有条件温和、易于分离和操作简单等优点。