Improved one-pot synthesis of 3-spiro indolines under microwave irradiation

A Dandia, M Saha, H Taneja

Index: Dandia, Anshu; Saha, Mitali; Taneja, Harshita Phosphorus, Sulfur and Silicon and Related Elements, 1998 , vol. 139, p. 77 - 85

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Citation Number: 4

Abstract

Abstract The potential of the domestic microwave oven has been utilized to accelerate the one-pot synthesis of spiro [indole-thiazolidine] diones and spiro [indole-benzothiazine] diones by condensation of substituted indole-2.3-diones (1) and appropriate anilines (2) with mercaptopropionic acid (4a/b) and o-mercaptobenzoic acid (5) in open borosilicate vessels, using ethanol as energy transfer medium. The reaction rate was 400–500 times ...