Über die chemie substituierter benzochinone—XI: Untersuchungen zur synthese von 3-hydroxyphenoxazonen-(2)

W Schäfer, H Schlude

Index: Schaefer,W.; Schlude,H. Tetrahedron, 1971 , vol. 27, p. 4721 - 4735

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Citation Number: 9

Abstract

Substituted 2, 5-dimethoxy-and 2, 5-diphenoxy-1, 4-benzoquinones react with o- aminophenols to give an equilibrium mixture of 2-phenylamino-5-methoxy (phenoxy)-1, 4- benzoquinones and semiketals. The equilibrium depends on the substitution of the components and the solvent. The semiketals are transformed to 3-hydroxy-2-phenoxazones in acid solution.