New perylenequinone derivatives from the endophytic fungus Alternaria tenuissima SS77

被引:15
作者
Chagas, Fernanda O. [1 ]
Dias, Luis G. [2 ]
Pupo, Monica T. [1 ]
机构
[1] Univ Sao Paulo, Fac Ciencias Farmaceut Ribeirao Preto, Dept Ciencias Farmaceut, Ave Cafe S-N, BR-14040903 Ribeirao Preto, SP, Brazil
[2] Univ Sao Paulo, Fac Filosofia Ciencias & Letras Ribeirao Preto, Dept Quim, Ave Bandeirantes 3900, BR-14040901 Ribeirao Preto, SP, Brazil
基金
巴西圣保罗研究基金会;
关键词
Perylenequinones; Mycotoxins; Phytotoxins; Biogenesis; Endophyte; ALTERTOXIN-II; METABOLITES; CERCOSPORIN; PIGMENTS; QUINONE; TAUTOMERISM; PHYTOTOXINS; ANTIFUNGAL; TOXINS;
D O I
10.1016/j.tetlet.2016.06.035
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
Three new natural products, 1,4,6b,7,10-pentahydroxy-1,2,6b,7,8,12b-hexahydroperylene-3,9-dione (1), 1,4,9,12a-tetrahydroxy-12-methoxy-1,2,11,12,12a,12b-hexahydroperylene-3,10-dione (2) and 1,4,9-tri-hydroxy-1,2-dihydroperylene-3,10-dione (3), were obtained from cultures of the endophytic fungus Alternaria tenuissima SS77. Their chemical structures were determined by combined analysis of one and two-dimensional NMR spectra, UV and ESIHRMS data. Compound 3 is likely an intermediate in the biosynthetic pathway of some perylenequinones produced by this fungus. A new hypothesis for the biosynthesis of partially reduced perylenequinones is suggested. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码:3185 / 3189
页数:5
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