Stereoselective Synthesis and Absolute Configuration Determination of Xylariolide A
作者:José Manuel Botubol、Antonio J. Macías-Sánchez、Isidro G. Collado、Rosario Hernández-Galán
DOI:10.1002/ejoc.201201526
日期:2013.4
asymmetric synthesis of the antibacterial and antitumoral natural compound xylariolide A (1) and five stereoisomers has been achieved. The strategy is based on the one-pot epoxidation/lactonisation or dihydroxylation/lactonisation of the hypothetical biosynthetic intermediate xylarioic A acid (8). The absolute configuration of xylariolide A was thus determined to be 3R,4S,5R,1′R,2′R after the synthesis of
抗菌和抗肿瘤的天然化合物木香内酯 A (1) 和五种立体异构体的不对称合成已经实现。该策略基于假设的生物合成中间体木霉酸 (8) 的一锅环氧化/内酯化或二羟基化/内酯化。因此,在合成 1 个差向异构体,即 1'-epi-xylariolide A (3) 和 2'-epi 后,木香内酯 A 的绝对构型确定为 3R,4S,5R,1'R,2'R -xylariolide A (4) 和另外三种非对映异构体 5–7。