Reinvestigation of structure of porritoxin, a phytotoxin of Alternaria porri.
The structure of porritoxin, a phytotoxin of Alternaria porri, was reinvestigated by detailed 2D NMR analysis including (1)H-(13)C and (1)H-(15)N HMBC experiments. The structure of porritoxin was determined to be 2-(2'-hydroxyethyl)-4-methoxy-5-methyl-6-(3' '-methyl-2' '-butenyloxy)-2,3-dihydro-1H-isoindol-1-one (1). Thus our previous proposed structure, 8-(3',3'-dimethylallyloxy)-10-methoxy-9-methyl-1H-3,4-dihydro-2,5-benzoxazocin-6(5H)-one (2), is incorrect.
Research Institute for Production Development, 15 Shimogamo Morimoto-cho, Sakyoku, Kyoto 606-0805, Japan.
Masayuki
M
Horiuchi
Takashi
T
Maoka
Noriyasu
N
Iwase
Keiichiro
K
Ohnishi
D000528:Alternaria / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid; D007211:Indoles / Q000737:chemistry*; D054833:Isoindoles; D007564:Japan; D008968:Molecular Conformation; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular
D007211:Indoles; D054833:Isoindoles; C466610:porritoxin