Indoles

It has been found that the heating of arylhydrazine salts and dihydropyran in dioxane leads to the corresponding homotryptophols.For Communication IX, see 6].See I. I. Grandberg and N. I. Bobrova, USSR Patent No. 239,341, Byull. Izobr., No. 11 (1969).Translated from Khimiya Geterotsiklicheskikh Soedinenii, Vol. 6, No. 7, pp. 942–944, July, 1970.