Solvent-Free One-Pot Synthesis of Sulfonephthaleins from Saccharin and Phenols

…, HB Borate, RD Wakharkar, VR Choudhary

Index: Tillu; Dumbre; Borate; Wakharkar; Choudhary Synthetic Communications, 2012 , vol. 42, # 8 p. 1101 - 1107

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Abstract

Though sulfonephthaleins are used widely, there are only a few reports about their synthesis. Harden and Drake [ 6 6. Harden , W. ; Drake , N. A new series of sulfonephthaleins . J. Am. Chem. Soc. 1929 , 51 , 562 . [CrossRef] View all references ] synthesized a number of sulfonephthaleins having four halogens in the o-sulfobenzoic acid part of the molecules. The sulfonephthaleins were prepared by the addition of halogenated o-sulfobenzoic ...