Isolation, Structure Elucidation, and Total Synthesis of Myrtuspirone A from <i>Myrtus communis</i>
作者:Min-Jing Cheng、Xin-Yi Yang、Jia-Qing Cao、Chao Liu、Li-Ping Zhong、Ying Wang、Xue-Fu You、Chuang-Chuang Li、Lei Wang、Wen-Cai Ye
DOI:10.1021/acs.orglett.9b00108
日期:2019.3.15
A pair of enantiomeric triketone–phloroglucinol hybrids, (+)- and (−)-myrtuspirone A (1), featuring an unprecedented 3-isopropyl-3H-spiro[benzofuran-2,1′-cyclohexane] backbone, were isolated from the leaves of Myrtus communis. The absolute configuration of each enantiomer of 1 was determined by X-ray diffraction and chemical calculations. Furthermore, the gram-scale total syntheses of (±)-1 and (−)-1
一对映异构体的三酮-间苯三酚杂交,(+) -和( - ) - myrtuspirone A(1),具有前所未有的3-异丙基-3- ħ -螺[苯并呋喃-2,1'-环己烷]骨架,从分离桃金娘(Myrtus communis)的叶子。通过X射线衍射和化学计算来确定1的每个对映异构体的绝对构型。此外,使用迈克尔-N-碘代琥珀酰亚胺(NIS)介导的(3 + 2)-环化反应以四个步骤进行(±)-1和(-)- 1的克级总合成。(+)-和(-)- 1都表现出对革兰氏阳性细菌(包括耐多药菌株)的抗菌活性。