Evaluation of Jatropha isabelli natural products and their synthetic analogs as potential antimalarial therapeutic agents
作者:Victor Hadi、Megan Hotard、Taotao Ling、Yandira G. Salinas、Gustavo Palacios、Michele Connelly、Fatima Rivas
DOI:10.1016/j.ejmech.2013.04.030
日期:2013.7
more selective analogs. Compounds 25 and 32 of this natural product–inspired compound library exhibited micromolar EC50 values against strains 3D7 and K1, thus providing a new antimalarial molecular scaffold. Our report describes an efficient derivatization approach used to evaluate the structure–activity relationship of jatrophone analogs in search of potential new antimalarialagents.
54% at 100 mg/kg. The jatropholone B derivatives 9 - 14 and the compounds 15 - 18 were compared at a single oral dose of 25 mg/kg while the jatropholone A derivatives 2 - 7 were assessed at 100 mg/kg. A decrease in gastroprotective activity was observed for the ether as well as for the ester derivatives of jatropholone B. The methyl and propyl ethers of jatropholone A were more gastroprotective than
在小鼠的 HCl/乙醇诱导的胃损伤模型中评估了二萜类 jatropholone A、jatropholone B 和 16 种半合成衍生物的胃保护作用,并确定了对成纤维细胞和 AGS 细胞的细胞毒性。在一项剂量反应研究中,6 mg/kg 时的 jatropholone B 使胃损伤减少了 65%,而 100 mg/kg 时,jatropholone A 减少了 54%。在 25 mg/kg 的单次口服剂量下比较了麻风树酚 B 衍生物 9-14 和化合物 15-18,而在 100 mg/kg 下评估了麻风藤酚 A 衍生物 2-7。观察到乙醚以及麻风树酚 B 的酯衍生物的胃保护活性降低。麻风树酚 A 的甲基和丙基醚比天然产物更具胃保护作用。在麻风树酚 B 衍生物的 C-2 上放置一个额外的甲基导致选择性的损失,甲基和丙基醚缺乏胃保护作用。Jatropholone B 对 AGS 细胞和成纤维细胞没有毒性。Jatropholone
Antiviral Effect of Natural and Semisynthetic Diterpenoids against Adenovirus Infection in vitro
作者:Juan Esteban Bidart、Mariano Walter Pertino、Guillermo Schmeda-Hirschmann、Laura Edith Alché、Erina Petrera
DOI:10.1055/a-2058-3635
日期:2023.8
highlighted the need to develop new broad-spectrum antivirals to mitigate human infections. Pursuing our search for new bioactive plant-derived molecules, we study several diterpene derivatives synthesized from jatropholones A and B and carnosic acid isolatedfrom Jatropha isabellei and Rosmarinus officinalis, respectively. Here, we investigate the antiviral effect of the diterpenes against human adenovirus
The absolute configuration of jatropholone A 1 and B 2, including the possibility to observe the vibrational circular dichroism (VCD) capacity to differentiate between two epimeric compounds in the presence of an inherently dissymmetric chromophore, which normally dominates VCD and electronic circular dichroism (ECD) spectra, followed after comparison of their experimental and DFT calculated VCD spectra, allowed us to conclude that although non-local (M/P) chirality generated by atropisomerism dominates over local chirality generated by an (R/S) change, the stereogenic center can confidently be assigned by VCD after DFT calculations. In addition, the absolute configurations of jatrophatrione 3 and citlalitrione 4, a compound proposed as a taxonomic marker for the genus Jatropha, were assigned by contrasting their respective calculated and experimental IR and VCD spectra. The evaluation of Flack and Hooft parameters obtained from the single-crystal X-ray diffraction data of jatropholone B acetate 6, and of 4 independently confirmed the absolute configurations of these molecules. (C) 2016 Elsevier Ltd. All rights reserved.