ISOLATION OF β-PHENYLLACTIC ACID RELATED COMPOUNDS FROM PSEUDOMONAS SYRINGAE

Article abstract of DOI:10.1016/0031-9422(90)80107-R

Three metabolites, weakly phytotoxic on apple and bean leaves, have been isolated from Pseudomonas syringae pv papulans culture filtrates and their structures established by spectroscopic analysis.The trivial names of papuline, o-hydroxynitropapuline and papulinone were assigned to the three active substances.Papuline was the methylester of β-phenyllactic acid, and o-hydroxynitropapuline was its meta-hydroxy-para-nitro disubstituted derivative.Papulinone, a new β-lactone structurally related to β-phenyllactic acid, was identified as 4-(1-hydroxy-2-phenylethyl)-4-carbomethoxyoxyetan-2-one.