作者:Shashi B. Mahato、Niranjan P. Sahu、Amar N. Ganguly、Kazumoto Miyahara、Toshio Kawasaki
DOI:10.1039/p19810002405
日期:——
Besides β-sitosterol-β-D-glucoside and dioscin, two new steroidalglycosides, neohecogenin glucoside and tribulosin, isolated from the aerial part of TribulusterrestrisLinn. were respectively shown to be neohecogenin-3-O-β-D-glucopyranoside (2) and neotigogenin-3-O-β-D-xylopyranosyl(1→2)-[β-D-xylopyranosyl(1→3)]-β-D-glucopyranosyl(1→4)-[α-L-rhamnopyranosyl(1→2)]-β-D-galactopyranoside (7).
除了β谷甾醇-β- d葡糖苷和薯蓣皂甙,两个新的甾体糖苷,neohecogenin葡糖苷和tribulosin,从地上部分分离蒺藜属。分别示出为neohecogenin -3- ö -β- d吡喃葡萄糖苷(2)和neotigogenin -3- ö -β- d -xylopyranosyl(1→2) - [β- d -xylopyranosyl(1→3)] - β- D-吡喃葡萄糖基(1→4)-[α- L-鼠李糖吡喃糖基(1→2)]-β- D-吡喃半乳糖苷(7)。
Synthesis of a new cytotoxic cephalostatin/ritterazine analogue from hecogenin and 22-epi-hippuristanol
A new cephalostatin/ritterazine analogue was prepared from the commercially available hecogenin acetate and the natural cytotoxic steroid 22-epi-hippuristanol. The method involved the reductive dimerization of enaminoketones (condensation of alpha-aminoketones) and condensation between an enaminoketone and an alpha-hydroxyketone. The new analogue showed higher cytotoxic activity than the cytotoxic 22-epi-hippuristanol against MDA-MB-231, A-549 and HT-29 cultured tumor cell lines. (C) 2009 Elsevier Ltd. All rights reserved.
Callow; James, Journal of the Chemical Society, <hi>1955</hi>, p. 1617,1673