First total synthesis and phytotoxic activity of Streptomyces sp. metabolites abenquines
作者:Amalyn Nain-Perez、Luiz C.A. Barbosa、Celia R.A. Maltha、Giuseppe Forlani
DOI:10.1016/j.tetlet.2016.03.038
日期:2016.4
The first total synthesis of abenquines A, B2, C and D has been achieved in three steps starting from commercially available 2,5-dimethoxyaniline, with overall yields of 41–61%. Four analogues bearing the amino acids d-valine (17), l-methionine (18), and glycine (19), and benzylamine (20), were also prepared in 45–72% yield. The inhibitory properties of these compounds were evaluated against the photoautotrophic
从商业上可获得的2,5-二甲氧基苯胺开始,三步完成了苯醌A,B2,C和D的首次总合成,总收率为41-61%。还制备了四个带有氨基酸d-缬氨酸(17),1-蛋氨酸(18)和甘氨酸(19)和苄胺(20)的类似物,收率为45-72%。评估这些化合物对模型Synechococcus的光合自养生长的抑制特性sp。拉紧。苯甲醌C及其对映异构体基本上无效,而所有其他苯甲醌均显着抑制细胞增殖,其浓度可导致藻类生长抑制50%,范围为10 -5至10 -6M 。