Phytotoxic Neocassane Diterpenes from Eragrostis plana,Journal of Natural Products

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Phytotoxic Neocassane Diterpenes from Eragrostis plana
Journal of Natural Products ( IF 3.3 ) Pub Date : 2020-11-17 , DOI: 10.1021/acs.jnatprod.0c00324
Ana Paula P Klein Hendges ₁ , Elaine Fernanda Dos Santos ₁ , Sirlei D Teixeira , Francielli S Santana ₁ , Michelangelo M Trezzi , Andrea N L Batista ₂ , Joao M Batista ₃ , Vanderlei A de Lima , Francisco de Assis Marques ₁ , Beatriz Helena L N Sales Maia ₁

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Five new neocassane-like diterpenes (1–5) were isolated from the roots of Eragrostis plana. Their structures were elucidated by spectroscopic data, and the absolute configurations of the representative compounds neocassa-12(17),15-dien-3-one (2) and neocassa-12(13),15-diene-3,14-dione (5) were assigned by vibrational circular dichroism. The phytotoxic activity of compounds 3, 4, and 5 was evaluated against the germination and growth of Ipomoea grandifolia and Euphorbia heterophylla. Compound 4 exhibited the most potent activity for growth variables, resulting in the smallest radicle length of I. grandifolia and in the smallest aerial part length of E. heterophylla. Compound 5 reduced the germination speed index more effectively than the herbicide glyphosate (Roundup).

中文翻译：

来自画眉草的植物毒性新卡桑二萜

五个新neocassane状二萜（1 - 5）从根部分离画眉玻璃体。通过光谱数据阐明了它们的结构，以及代表性化合物neocassa-12(17),15-dien-3-one( 2 )和neocassa-12(13),15-diene-3,14-dione的绝对构型( 5 ) 由振动圆二色性分配。化合物的植物毒性活性的3，4，和5是对的发芽和生长进行评估番薯grandifolia和大戟太子参。化合物4表现出增长的变量的最有效的活性，导致最小的胚根长度I. grandifolia和在最小的地上部分长度E.太子参。化合物5比除草剂草甘膦 (Roundup) 更有效地降低了发芽速度指数。

更新日期：2020-12-24

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