中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
2,2-二氟-2-(2-甲氧基苯基)乙酸 | difluoro(2-methoxyphenyl)acetic acid | 1250773-62-6 | C9H8F2O3 | 202.158 |
—— | 2,2-difluoro-2-(2-methoxyphenyl)acetic acid amide | —— | C9H9F2NO2 | 201.173 |
—— | 2,2-Difluoro-2-(2-methoxyphenyl)ethan-1-amine | —— | C9H11F2NO | 187.189 |
Herein, a direct method for the synthesis of 3-fluoroindoles and 3,3-difluoroindolines from easily accessible 2,2-difluoro-2-phenylethan-1-amines is presented. This protocol was performed by Pd-catalyzed direct C–H/N–H coupling and employed picolinamide as a directing group. By controlling the temperature for this transformation, various 3,3-difluoroindolines and 3-fluoroindoles could be isolated with moderate to good yields.