Efficient synthesis of benzothiophenes by [4+1] cycloaddition of 2-mercaptobenzaldehyde derivatives with isocyanides
作者:Takahiro Soeta、Saori Shitaya、Takumi Okuno、Shuhei Fujinami、Yutaka Ukaji
DOI:10.1016/j.tet.2016.09.054
日期:2016.12
We developed a [4+1] cycloaddition reaction of isocyanides with 2-mercaptobenzaldehydes and/or their disulfide derivatives, promoted by LiI·2H2O, to afford benzothiophene derivatives in moderate to good yields. Isocyanides, 2-mercaptobenzaldehydes and disulfide derivatives of various types were used successfully in the reaction.
我们开发了由LiI·2H 2 O促进的异氰酸酯与2-巯基苯甲醛和/或其二硫化物衍生物的[4 + 1]环加成反应,以中等至良好的产率提供苯并噻吩衍生物。各种类型的异氰酸酯,2-巯基苯甲醛和二硫化物衍生物已成功用于反应中。