Ciamician; Silber, Chemische Berichte, 1895, vol. 28, p. 1393
作者:Ciamician、Silber
DOI:——
日期:——
Michael, Chemische Berichte, 1894, vol. 27, p. 2686
作者:Michael
DOI:——
日期:——
Antileishmanial activities of dihydrochalcones from piper elongatum and synthetic related compounds. Structural requirements for activity
作者:Alicia Hermoso、Ignacio A Jiménez、Zulma A Mamani、Isabel L Bazzocchi、José E Piñero、Angel G Ravelo、Basilio Valladares
DOI:10.1016/s0968-0896(03)00406-1
日期:2003.9
Two dihydrochalcones (1 and 2) were isolated from Piper elongatum Vahl by activity-guided fractionation against extracellular promastigotes of Leishmania braziliensis in vitro. Their structures were elucidated by spectral analysis, including homonuclear and heteronuclear correlation NMR experiments. Derivatives 3-7 and 20 synthetic related compounds (8-27) were also assayed to establish the structural requirements for antileishmanial activity. Compounds 1-11 that proved to be more active that ketoconazol, used as positive control, were further assayed against promastigotes of Leishmania tropica and Leishmania infantum. Compounds 7 and 11, with a C-6-C-3-C-6 System, proved to be the most promising compounds, with IC50 values of 2.98 and 3.65 mug/mL, respectively, and exhibited no toxic effect on macrophages (around 90% viability). Correlation between the molecular structures and antileishmanial activity is discussed in detail. (C) 2003 Elsevier Ltd. All rights reserved.
FUNATSU, TAKAKAZU;IRIYE, RYOZO;TAKAI, HIDEYUKI;HIROTA, MITSURU, AGR. AND BIOL. CHEM., 53,(1989) N1, C. 3087-3089
Synthesis, Crystal Structure, and Biological Evaluation of a Series of Phloretin Derivatives
作者:Li Wang、Zheng-Wei Li、Wei Zhang、Rui Xu、Fei Gao、Yang-Feng Liu、Ya-Jun Li
DOI:10.3390/molecules191016447
日期:——
A one-step synthesis of phloretinderivatives 2–11 from phloretin in good to excellent yields is reported. Their structures were characterized by 1H-NMR, 13C-NMR and MS, and the structures of 8 and 11 were determined by X-ray diffraction analysis. A mechanism for the formation of 9–11 is proposed. Compared with the anticancer drug docetaxel, phloretin, phloretinderivatives and phlorizin exhibited