Total synthesis of curvulone B and a proposed structure for dothiorelone B; determination of the configuration of curvulone B and structural revision of phomopsin A
作者:Shunya Takahashi、Yuki Akita、Takemichi Nakamura、Hiroyuki Koshino
DOI:10.1016/j.tetasy.2012.06.009
日期:2012.7
The total synthesis of curvulone B was achieved, and its absolute configuration unambiguously established, as had been determined by TD-DFT ECD calculations on the computed solution conformers. Key features of the synthesis were an olefin cross-metathesis of an α,β-unsaturated ketone as a common key building block with (R)-6-triethylsilyloxyhept-1-ene, and an intramolecular oxy-Michael addition of
如通过TD-DFT ECD计算得出的解决方案构象异构体所确定的那样,实现了曲妥酮B的全合成,并明确建立了其绝对构型。合成的关键特征是与(R)-6-三乙基甲硅烷基氧基庚1烯作为共同关键结构单元的α,β-不饱和酮的烯烃交叉复分解,以及获得的羟基烯酮的分子内氧-迈克尔加成反应由此。烯酮与(S)-5-苄氧基庚烯的分子间复分解反应也使我们能够制备拟议的多硫瑞龙B的结构,从而证实了新的九元环状苯酚醚磷脂A的结构变化。