Biosynthesis-Inspired Total Synthesis of Bioactive Styryllactones (+)-Goniodiol, (6<i>S</i>,7<i>S</i>,8<i>S</i>)-Goniodiol, (−)-Parvistone D, and (+)-Parvistone E
作者:Perla Ramesh、Tadikamalla P. Rao
DOI:10.1021/acs.jnatprod.6b00386
日期:2016.8.26
A protecting-group-free total synthesis of (+)-goniodiol (1), (6S,7S,8S)-goniodiol (2), (−)-parvistone D (4), and (+)-parvistone E (6) was efficiently achieved in five steps from commercially available trans-cinnamaldehyde with high overall yields (72–75%). The synthesis strategy was inspired from the proposed biosynthesis pathway of styryllactones. Key transformations of the strategy include a one-pot
(+)-goniodiol(1),(6 S,7 S,8 S)-goniodiol(2),(-)-parvistone D(4)和(+)-parvistone的无保护基的全合成E(6)从市售反式分子的五步反应中有效地获得了。-肉桂醛具有较高的总收率(72–75%)。合成策略是从拟定的苯乙烯基内酯的生物合成途径中获得启发的。该策略的关键转变包括在水性介质中一氧化碳球蛋白从一锅转化为goniodiol或9-deoxygoniopypyrone,立体选择性环氧化,闭环复分解和立体选择性Maruoka烯丙基化。该路线适合合成各种类似物以进行生物学评估。