Tetrahedron

The reaction of 2-arylsulfonyloxytropones and active methylene compounds: The formation of 8-hydroxy-2H-cyclohepta [b] furan-2-one and 2-amino-8H-cyclohepta [b] …

T Nozoe, K Takase, M Kato, T Nogi

Index: Nozoe,T. et al. Tetrahedron, 1971 , vol. 27, p. 6023 - 6035

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Citation Number: 21

Abstract

Reaction of 2-arylsulfonyloxytropones (IV) and active methylene compounds, diethyl malonate, ethyl acetoacetate, ethyl cyanoacetate, malononitrile or cyanoacetamide, in the presence of NaOEt give 8-hydroxy-2H-cyclohepta [b] furan-2-one derivatives (V) and/or 2- amino-8H-cyclohepta [b] furan-8-one derivatives (VII), in addition to azulene derivatives (1) or 2H-cyclohepta (b] furan-2-one derivatives (II), known to be obtained by the reaction of 2 ...