The synthesis of diethyl 2-hydroxyazulene-1, 3-dicarboxylate from troponoids and some reactions of 2-hydroxyazulene derivatives

T Nozoe, K Takase, N Shimazaki

Index: Nozoe,T. et al. Bulletin of the Chemical Society of Japan, 1964 , vol. 37, # 11 p. 1644 - 1648

Full Text: HTML

Citation Number: 41

Abstract

It has been reported that 2-chlorotropone and 2-methoxytropone react with ethyl cyanoacetate or malononitrile, in the presence of sodium ethoxide, to give azulene derivatives. 1) On the other hand, 1-oxaazulan-2-one (2H-cyclohepta [b] furan-2-one) derivatives have been obtained by the reaction of these tropone derivatives and diethyl malonate or ethyl acetoacetate. 2) We have reexamined these reactions with an interest in ...