The reaction of carbon monoxide at elevated pressures and temperatures with the S- potassium salts of various 2-and 3-substituted indole derivatives has been investigated. The results indicate that the indole carbonylation reaction, as it is termed, can be used to prepare 3-indolecarboxaldehydes provided the 2-position is not too hindered sterically or substituted with electron-withdrawing groups. A new compound, N-formylindoline was prepared and ...
[Saito, Kodai; Shibata, Yukihiro; Yamanaka, Masahiro; Akiyama, Takahiko Journal of the American Chemical Society, 2013 , vol. 135, # 32 p. 11740 - 11743]