[HTML][HTML] An efficient ultrasound-promoted method for the synthesis of bis (indole) derivatives

S Rahimi, MA Amrollahi… - Comptes …, 2015 - comptes-rendus.academie-sciences …
Comptes Rendus. Chimie, 2015comptes-rendus.academie-sciences …
Résumé In this paper, the reaction of indole with electron-deficient alkenes in aqueous
media is reported. This procedure allows the synthesis of bis (indole) derivatives in good to
high yields at 90 C under silent and ultrasound irradiation conditions. Short reaction times
and high yields of desired products are the main advantages of the presented procedure.
This reaction catalyzed by 12-tungstophosphoric acid is operationally simple and considers
environmental aspects by avoiding toxic catalysts and solvents.
Resume
In this paper, the reaction of indole with electron-deficient alkenes in aqueous media is reported. This procedure allows the synthesis of bis (indole) derivatives in good to high yields at 90 C under silent and ultrasound irradiation conditions. Short reaction times and high yields of desired products are the main advantages of the presented procedure. This reaction catalyzed by 12-tungstophosphoric acid is operationally simple and considers environmental aspects by avoiding toxic catalysts and solvents.
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