Catalytic synthesis of heterocycles. VI. Dehydrocyclization of o-alkylbenzenes to indoles

C Hansch, G Helmkamp

Index: Hansch; Helmkamp Journal of the American Chemical Society, 1951 , vol. 73, p. 3080

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Citation Number: 19

Abstract

In continuing our program's2 of developing catalytic methods for the synthesis of heterocycles it was decided to investigate the method reported for indole in a recent patent by Gresham and Br~ ner.~ They reported the dehydrocyclization of o-ethylaniline to indole by means of a titania gel catalyst at temperatures of 550 to 750'. These investigators make no mention of attempts to extend this unique synthesis to other indoles. Although previous ...