作者:Jef De Brabander、Yue Pan
DOI:10.1055/s-2006-933144
日期:——
A stereocontrolled synthesis of two diastereomeric C1-C22 fragments of spirastrellolide A consistent with reported spectroscopic data has been achieved to aid in a complete configurational assignment of this structurally novel and potent antimitotic natural product. A highly convergent coupling of two enantiomeric C1-C10 methyl ketone fragments with an enantiopure C11-C22 spiroketal aldehyde produced the C1-C22 fragments with a longest linear sequence of 13 steps from commercially available starting materials.
螺旋藻内酯 A 的两种非对映异构体 C1-C22 片段的立体控制合成与所报道的光谱数据一致,有助于对这种结构新颖、强效的抗杀菌天然产物进行完整的构型分配。两个对映体 C1-C10 甲基酮片段与对映体纯度为 C11-C22 的螺酮醛进行了高度趋同的偶联反应,通过 13 个步骤的最长线性序列,从市场上可买到的起始原料中制备出了 C1-C22 片段。