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。