Stereoselective Syntheses of <i>trans</i>-Anhydromevalonic Acid and <i>trans</i>-Anhydromevalonyl Group-Containing Natural Products
作者:Atsushi Nakayama、Yoko Yasuno、Yuki Yamamoto、Kai Saito、Kohei Kitsuwa、Hironori Okamura、Tetsuro Shinada
DOI:10.1021/acs.jnatprod.1c01176
日期:2022.4.22
Collective total syntheses of trans-anhydromevalonic acid (tAHMA) and trans-anhydromevalonyl (tAHM) group-containing natural products (pestalotiopin A, pestalotiopamide C, pestalotiopamide D, farinomalein E, eleutherazine B, and trichocyclodipeptide A) were achieved using tAHMA esters as key intermediates. To this end, tAHMA tert-butyl ester was newly prepared by Z-vinyltosylation of tert-butyl 3-
使用tAHMA酯作为关键,实现了反式-脱水甲羟戊酸 (tAHMA) 和反式-脱水甲羟戊酸 (tAHM) 基团的天然产物(pestalotiopin A、pestalotiopamide C、pestalotiopamide D、farinomalein E、eleutherazine B 和 trichocyclodipeptide A)的集体全合成中间体。为此,通过 3-氧代-5-((三异丙基甲硅烷基)氧基)戊酸叔丁酯的 Z-乙烯基甲苯基化,然后与 Me 2 Zn进行 Negishi 交叉偶联反应,新制备了tAHMA叔丁酯。tAHMA 酯通过酯化或酰胺化转化为目标天然产物。合成和天然产物的光谱数据的比较证实了天然产物中 tAHM 部分的E构型。