Synthesis and Absolute Configuration of Hongoquercin A, an Antibacterial Sesquiterpene-Substituted Orsellinic Acid Isolated as a Fungal Metabolite
作者:Hisayuki Tsujimori、Masahiko Bando、Kenji Mori
DOI:10.1002/(sici)1099-0690(200001)2000:2<297::aid-ejoc297>3.0.co;2-b
日期:2000.1
(±)-Hongoquercin A (1), the racemate of an antibacterial fungal metabolite, has been synthesized starting from geranylacetone (2) and ethyl orsellinate (ethyl 2,4-dihydroxy-6-methylbenzoate, 5). The structure (±)-1 has been confirmed by X-ray analysis of its ethyl ester (±)-10. Synthesis of the naturally occurring (+)-hongoquercin A from (−)-sclareol (11) established its configuration as depicted in
(±)-Hongoquercin A (1) 是一种抗菌真菌代谢物的外消旋物,已从香叶基丙酮 (2) 和 orsellinate 乙酯(2,4-二羟基-6-甲基苯甲酸乙酯,5)开始合成。结构(±)-1已通过其乙酯(±)-10的X-射线分析证实。从 (-)-紫苏醇 (11) 合成天然存在的 (+)-红槲皮素 A 建立了其构型,如 1 所示。