反应详情

温度

120 °C

A mixture of 2-(2-indenyl)indole 4 (75 mg; 0.32 mmol) and ethyl cis-β-cyanoacrylate (81 mg; 0.64 mmol) in trifluoroacetic acid (1 mL) was heated in a sealed reaction vial at 120° C. for 1 h., followed by 4 h at 160° C. The mixture was evaporated at reduced pressure and the residue was triturated with ether. The resulting solid was chromatographed (silica gel; EtOAc: hexanes; 1:1) to give 12 mg (12%) of tan solid product; mp 275°-280° C., MS (ES+) 310 (M+). This compound showed identical spectral data as that prepared in Method A.

1. customThe mixture was evaporated at reduced pressure
2. customthe residue was triturated with ether
3. customThe resulting solid was chromatographed (silica gel; EtOAc: hexanes; 1:1)