Asymmetric Total Synthesis of 6-Tuliposide B and Its Biological Activities against Tulip Pathogenic Fungi
作者:Kengo SHIGETOMI、Shoko OMOTO、Yasuo KATO、Makoto UBUKATA
DOI:10.1271/bbb.100845
日期:2011.4.23
The structure-activity relationship was investigated to evaluate the antifungal activities of tuliposides and tulipalins against tulip pathogenic fungi. 6-Tuliposide B was effectively synthesized via the asymmetric Baylis-Hillman reaction. Tuliposides and tulipalins showed antifungal activities against most of the strains tested at high concentrations (2.5 mm), while Botrytis tulipae was resistant to tuliposides. Tulipalin formation was involved in the antifungal activity, tulipalin A showed higher inhibitory activity than 6-tuliposide B and tulipalin B. Both the tuliposides and tulipalins showed pigment-inducing activity against Gibberella zeae and inhibitory activity against Fusarium oxysporum f. sp tulipae. These activities were induced at a much lower concentration (0.05 mm) than the antifungal MIC values.
为评估郁金香苷和郁金香醛对郁金香致病真菌的抗真菌活性,研究了其结构-活性关系。通过不对称 Baylis-Hillman 反应,有效合成了 6-郁金香苷 B。郁金香苷和郁金香醛在高浓度(2.5 毫米)下对大多数受试菌株具有抗真菌活性,而郁金香灰霉病菌对郁金香苷具有抗性。郁金香苷的形成参与了抗真菌活性,郁金香苷 A 的抑制活性高于 6-郁金香苷 B 和郁金香苷 B。郁金香苷和郁金香醛都对 Gibberella zeae 具有色素诱导活性,对 Fusarium oxysporum f. sp tulipae 具有抑制活性。这些活性是在比抗真菌 MIC 值低得多的浓度(0.05 毫米)下产生的。