One-Pot Synthesis of 3-Acyl-2-(alkylsulfanyl)indoles and 2-(Alkylsulfanyl)indole-3-carboxylates from (2-Isocyanophenyl)methyl Ketones or (2-Isocyanophenyl)acetates
An efficient method has been developed for the preparation of 3-acyl-2-(alkylsulfanyl)indoles and ethyl 2-(alkylsulfanyl)indole-3-carboxylates under mild conditions. (2-Iso-cyanophenyl)methyl ketones and ethyl 2-(2-isocyanophenyl)acetates were converted into the corresponding isothiocyanates by treatment with sulfur in the presence of a catalytic amount of selenium. The isothiocyanates were then treated
A convenient procedure for the synthesis of 2,N,N‐trisubstituted 1H‐indole‐1‐carbothioamides from2‐(acylmethyl)phenyl isocyanides has been developed. Thus, these isocyanides are converted into (Z)‐ [1‐alkyl (or phenyl)‐2‐(2‐isothiocyanatophenyl)ethenyl] 1,1‐dimethylethyl carbonates via an easy two‐step sequence. Treatment with secondary amines gave thiourea intermediates which afforded with CF3COOH