Synthesis of Indole and Biindolyl Triflones: Trifluoromethanesulfonylation of Indoles with Tf<sub>2</sub>O/TTBP (2,4,6-tri-<i>tert</i>-butylpyridine) System
作者:Xiu-Hua Xu、Guo-Kai Liu、Ayaka Azuma、Etsuko Tokunaga、Norio Shibata
DOI:10.1021/ol201931x
日期:2011.9.16
A convenient synthesis of indole triflones is reported. N-Alkyl, aryl and N-H indole triflones were obtained in 82–96% yields by the Tf2O/TTBP System. Biindolyl triflones were accessed in 51–81% yields for the first time by simple treatment of the resulting indole triflones with a base and without any use of organometallic chemistry. An environmentally friendly solvent, Solkane 365/227, can be substituted
据报道,吲哚三烯酮的方便合成。通过Tf 2 O / TTBP系统获得N-烷基,芳基和N- H吲哚三氟酮,产率为82-96%。通过简单地用碱处理所得的吲哚三氟甲磺酸,而不使用任何有机金属化学方法,首次以51-81%的产率获得了Biindolyl三氟甲磺酸。可以使用环保溶剂Solkane 365/227代替该工艺,而不会降低效率。