J. Liang, H. Cha, Seung Ho Lee
Apr 5, 2012
Citations
1
Influential Citations
8
Citations
Journal
Archives of Pharmacal Research
Abstract
A new procedure for the preparation of emodin carbaldehyde and citreorosein was described, in which, ω,ω′-dibromomethylemodin triacetate was prepared as a key intermediate by NBSmediated bromination of 1,3,8-triacetylemodin. Reduction of emodin and citreorosein with SnCl2 in a 1:1 mixture of HOAc and HCl afforded the corresponding anthrones in 90% and 92% yield, respectively, while the corresponding 10-desoxyemodin carbaldehyde was prepared by MnO2 oxidation of 10-desoxycitreorosein. 10-Desoxycitreorosein and emodin carbaldehyde showed feasible μ-calpain inhibitory activities with IC50 values of 20.15 and 25.77 M, respectively.