SILICOTUNGSTIC ACID (cas 11130-20-4) (H4SiW12O40): An efficient Keggin heteropoly acid catalyst for the synthesis of oxindole derivatives
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Add time:07/20/2019 Source:sciencedirect.com
Condensation of various isatins with heteroaromatics (indoles and pyrrole) has been carried out in the presence of catalytic amount of SILICOTUNGSTIC ACID (cas 11130-20-4) (STA) at room temperature to form their corresponding 3,3-bis(indolyl)- and 3,3-bis(2-pyrrolyl)oxindoles. The mechanistic aspects of the reaction have also been discussed.
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