Withaferin A and Withanolide D Analogues with Dual Heat-Shock-Inducing and Cytotoxic Activities: Semisynthesis and Biological Evaluation
作者:E. M. Kithsiri Wijeratne、Maria C. F. Oliveira、Jair Mafezoli、Ya-Ming Xu、Sandro Minguzzi、Pedro H. J. Batista、Otília D. L. Pessoa、Luke Whitesell、A. A. Leslie Gunatilaka
DOI:10.1021/acs.jnatprod.7b00918
日期:2018.4.27
analogues of withaferin A (WA) and withanolide D (WD) including 17 new compounds by semisynthesis involving chemical and microbial transformations. Hitherto unknown 16β-hydroxy analogues of WA and WD were prepared by their reaction with triphenylphosphine/iodine, providing unexpected 5β-hydroxy-6α-iodo analogues (iodohydrins) followed by microbial biotransformation with Cunninghamella echinulata and base-catalyzed