Pigments of Fungi. LIX. Synthesis of (1S,3S)- and (1R,3R)-Austrocortilutein and (1S,3S)-Austrocortirubin from Citramalic Acid
作者:Melvyn Gill、Michael F. Harte、Abilio Ten
DOI:10.1071/ch99091
日期:——
The naturally occurring tetrahydroanthraquinone(1S,3S)-austrocortilutein (1) issynthesized for the first time in enantiomerically pure form byDiels–Alder cycloaddition between the functionalized butadienederivative (8) and the chiral1,3-dihydroxy-1,2,3,4-tetrahydro-5,8-naphthoquinone (9), the latter beingderived from (R)-citramalic acid (3). The naturalproducts (1S,3S)-austrocortirubin(2) and (1R,
天然存在的四氢蒽醌 (1S,3S)-austrocortilutein (1) 首次通过功能化丁二烯衍生物 (8) 和手性 1,3-二羟基-1,2,3,4- 之间的 Diels-Alder 环加成以对映体纯形式合成tetrahydro-5,8-naphthoquinone (9),后者衍生自 (R)-柠苹果酸 (3)。naturalproducts (1S,3S)-austrocortirubin(2) 和(1R,3R)-austrocortilutein(5) 也是第一次使用相同的策略制备。