作者:Marius Morkunas、Martin E. Maier
DOI:10.1016/j.tet.2015.10.063
日期:2015.12
Two novel routes to the acylphloroglucinol rhodomyrtone (1) which has antibiotic properties are presented. In the first route an ortho-quinone methide, generated from dioxaborinine 23, is reacted with syncarpic acid (10) leading to xanthenedione 25. Cleavage of the methyl ether functions led to the known rhodomyrtone precursor 16. In the second route the bis-ester derivative 28 of trihydroxybenzaldehyde
提出了两种具有抗菌特性的酰基间苯三酚Rhodomyrtone(1)的新途径。在第一种途径中,由二氧杂丁胺23生成的邻醌甲基化物与对苯二甲酸(10)反应生成黄原二酮25。甲醚功能的裂解导致已知的Rhodomyrtone前体16。在第二种方法中,将三羟基苯甲醛26的双酯衍生物28与对苯二甲酸(10)缩合,得到三环半缩醛29。烯酮功能的乙酸化和铜酸盐的添加导致了双酯32TiCl 4诱导的区域选择性弗里斯重排产生了Rhodomyrtone(1)。