A Novel Isoindoline, Porritoxin Sulfonic Acid, from Alternaria porri and the Structure-phytotoxicity Correlation of Its Related Compounds

Masayuki HORIUCHI; Keiichiro OHNISHI; Noriyasu IWASE; Yoshikazu NAKAJIMA; Kenji TOUNAI; Masakazu YAMASHITA; Yasumasa YAMADA

doi:10.1271/bbb.67.1580

Organic Chemistry Notes

A Novel Isoindoline, Porritoxin Sulfonic Acid, from Alternaria porri and the Structure-phytotoxicity Correlation of Its Related Compounds

Masayuki HORIUCHI, Keiichiro OHNISHI, Noriyasu IWASE, Yoshikazu NAKAJIMA, Kenji TOUNAI, Masakazu YAMASHITA, Yasumasa YAMADA

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Keywords: Alternaria porri, porritoxin sulfonic acid, zinniol, phytotoxin, seedling-growth assay

JOURNAL FREE ACCESS

2003 Volume 67 Issue 7 Pages 1580-1583

DOI https://doi.org/10.1271/bbb.67.1580

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Abstract

Novel zinniol-related compound 3, named porritoxin sulfonic acid, with an isoindoline skeleton was isolated from the culture liquid of Alternaria porri. The structure was determined to be 2-(2″-sulfoethyl)-4-methoxy-5-methyl-6-(3′-methyl-2′-butenyloxy)-2,3-dihydro-1H-isoindol-1-one. The phytotoxic activities of three isoindolines (1-3) were evaluated in a seedling-growth assay against stone leek and lettuce.

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