Peparation of New Nitrogen-bridged Heterocycles. 21. A Facile Synthesis of 2-Indolizinethiols Using New Protecting Groups
作者:Akikazu Kakehi、Suketaka Ito、Naoaki Yamada、Kiminobu Yamaguchi
DOI:10.1246/bcsj.63.829
日期:1990.3
Some indolizine derivatives having (2-cyanoethyl)thio or (2-ethoxycarbonylethyl)thio group at the 2-position were prepared in moderate to good yields starting from the corresponding pyridinium 1-(thiocarbonyl)methylides. The treatment of these indolizines with a strong base such as potassium t-butoxide in N,N-dimethylformamide (DMF) gave smoothly title compounds, 2-indolizinethiols, with the elimination
从相应的吡啶鎓1-(硫代羰基)甲基化物开始,以中等至良好的产率制备了一些在2-位具有(2-氰基乙基)硫基或(2-乙氧基羰基乙基)硫基的吲哚嗪衍生物。用强碱如叔丁醇钾在 N,N-二甲基甲酰胺 (DMF) 中处理这些吲哚腙,可顺利得到标题化合物 2-吲哚腙硫醇,同时去除丙烯腈或丙烯酸乙酯。