Structural Reassignment of <i>rel</i>-(3′<i>Z</i>,3<i>R</i>,6<i>R</i>,7<i>R</i>,3a′<i>R</i>,6′<i>R</i>)-3,8-Dihydrodiligustilide and the Activity of Diligustilide and 3,8-Dihydro- and 3,8,7′,7a′-Tetrahydrodiligustilides as Progestins
作者:José Luis Ávila、Ericka K. P. Almeida-Aguirre、Carlos A. Méndez-Cuesta、Rubén A. Toscano、Marco A. Cerbón Cervantes、Guillermo Delgado
DOI:10.1021/acs.orglett.9b02762
日期:2019.9.20
isolated from Ligusticum chuanxiong, the structure of which was earlier assigned to a semisynthetic product with nonidentical spectroscopic constants. The structure of this natural phthalide was reassigned with a proposal of its absoluteconfiguration. Phthalides acted as progestins in cell viability assays, immunofluorescence microscopy, and docking analysis. Therefore, the structures for natural and semisynthetic
Treatment of diligustilide (1) with base afforded the pentacyclic compounds 2 – 4 with novel carbon-carbon connectivities via lactone-ring opening, intramolecularcondensations and competitive equilibrations. This reaction provides a useful entry to modified dimeric phthalides.