Novel synthesis of dianthalexin (phytoalexin) analogues preparation

…, M Ponchet, P Ricci, J Favre??Bonvin

Index: Hauteville; Ponchet; Ricci; Favre-Bonvin Journal of Heterocyclic Chemistry, 1988 , vol. 25, # 3 p. 715 - 718

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Citation Number: 20

Abstract

Abstract Two phytoalexins, previously isolated from carnation infected by Phytophthora parasitica D., were synthesized: 2-phenyl-7-hydroxy-4H-3, l-benzoxazin-4-one (Dianthalexin) and 2-(2-hydroxybenzoyl)-amino-4-methoxybenzoic acid (Dianthramide A). The first one was obtained by using potassium t-butoxide in dimethylformamide to prevent its heterocycle opening. Five novel other analogous compounds were also prepared.