Antihyperglycemic Activities of Cryptolepine Analogues: An Ethnobotanical Lead Structure Isolated from <i>Cryptolepis sanguinolenta</i>
作者:Donald E. Bierer、Larisa G. Dubenko、Pingsheng Zhang、Qing Lu、Patricia A. Imbach、Albert W. Garofalo、Puay-Wah Phuan、Diana M. Fort、Joane Litvak、R. Eric Gerber、Barbara Sloan、Jian Luo、Raymond Cooper、Gerald M. Reaven
DOI:10.1021/jm970735n
日期:1998.7.1
Cryptolepine (1) is a rare example of a natural product whose synthesis was reported prior to its isolation from nature. In the previous paper we reported the discovery of cryptolepine's antihyperglycemic properties. As part of a medicinal chemistry program designed to optimize natural product lead structures originating from our ethnobotanical and ethnomedical field research, a series of substituted and heterosubstituted
Synthesis of Some Cryptolepine Analogues, Assessment of Their Antimalarial and Cytotoxic Activities, and Consideration of Their Antimalarial Mode of Action
作者:Onyeka Onyeibor、Simon L. Croft、Hilary I. Dodson、Mohammad Feiz-Haddad、Howard Kendrick、Nicola J. Millington、Silvia Parapini、Roger M. Phillips、Scott Seville、Steven D. Shnyder、Donatella Taramelli、Colin W. Wright
DOI:10.1021/jm040893w
日期:2005.4.1
seen (ED(90) = 21.6 mg kg(-1) day(-1)). The antimalarial mode of action of 1 appears to be similar to that of chloroquine and involves the inhibition of hemozoin formation. A number of analogues were assessed for their effects on the inhibition of beta-hematin (hemozoin) formation, and the results were compared with their antiplasmodial activities having taken account of their predicted accumulation into
Substituted Indoloquinolines as New Antifungal Agents
作者:Seth Y Ablordeppey、Pingchen Fan、Shouming Li、Alice M Clark、Charles D Hufford
DOI:10.1016/s0968-0896(01)00401-1
日期:2002.5
Cryptolepine (2) possesses desirable properties to serve as a lead in developing new antifungal agents. Using SAR techniques, several analogues of cryptolepine were designed to increase potency and to broaden the antifungal spectrum over several opportunistic microorganisms. A number of 2-substituted indoloquinolines have been synthesized and evaluated in antifungal screens and several have been shown to increase potency and expand the antifungal spectrum of cryptolepine. Comparison of MICs of a number of these analogues with standard antifungal agents, shows them to be comparable to Amphotericin B and Ketoconazole. (C) 2002 Elsevier Science Ltd. All rights reserved.
Design, Synthesis, and Antimicrobial Activity of Quindoline Derivatives Inspired by the Cryptolepine Alkaloid