Aphadilactones A-D, four diterpenoid dimers with DGAT inhibitory and antimalarial activities from a Meliaceae plant

  • J Org Chem. 2014 Jan 17;79(2):599-607. doi: 10.1021/jo402340h.
Jia Liu  1 ,  Xiu-Feng He ,  Gai-Hong Wang ,  Emilio F Merino ,  Sheng-Ping Yang ,  Rong-Xiu Zhu ,  Li-She Gan ,  Hua Zhang ,  Maria B Cassera ,  He-Yao Wang ,  David G I Kingston ,  Jian-Min Yue
Affiliations
  • 1. State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences , 555 Zu Chong Zhi Road, Shanghai 201203, P. R. China.
PMID: 24344740 DOI: 10.1021/jo402340h
Abstract

Aphadilactones A-D (1-4), four diastereoisomers possessing an unprecedented carbon skeleton, were isolated from the Meliaceae plant Aphanamixis grandifolia. Their challenging structures and absolute configurations were determined by a combination of spectroscopic data, chemical degradation, fragment synthesis, experimental CD spectra, and ECD calculations. Aphadilactone C (3) with the 5S,11S,5'S,11'S configuration showed potent and selective inhibition against the diacylglycerol O-acyltransferase-1 (DGAT-1) enzyme (IC50 = 0.46 ± 0.09 μM, selectivity index > 217) and is the strongest natural DGAT-1 inhibitor discovered to date. In addition, compounds 1-4 showed significant antimalarial activities with IC50 values of 190 ± 60, 1350 ± 150, 170 ± 10, and 120 ± 50 nM, respectively.

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