Methanesulfonic acid catalyzed cyclization of 3-arylpropanoic and 4-arylbutanoic acids to 1-indanones and 1-tetralones

V Premasagar, VA Palaniswamy…

Index: Premasagar, Vuppalapaty; Palaniswamy, Venkatapuram A.; Eisenbraun, Edmund J. Journal of Organic Chemistry, 1981 , vol. 46, # 14 p. 2974 - 2976

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Citation Number: 63

Abstract

Several acidic reagents are available for the preparation of cyclic ketones from 3-and 4-aryl- substituted carboxylic acids.'Literature references to the use of methanesulfonic acid (MSA) for this purpose are meagere2 Eaton and Carlson3 describe a cyclization procedure using a hot mixture of MSA and P205. Since MSA ordinarily does not cause sulfonation of aromatic rings, we considered that neat MSA, at elevated temperatures, should be a superior ...

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