Novel synthetic oleanane triterpenoids: A series of highly active inhibitors of nitric oxide production in mouse macrophages
作者:Ta-i Honda、BarbieAnn V. Rounds、Lothar Bore、Frank G. Favaloro、Gordon W. Gribble、Nanjoo Suh、Yongping Wang、Michael B. Sporn
DOI:10.1016/s0960-894x(99)00623-x
日期:1999.12
Novel oleanane triterpenoids with modified rings A and C were designed and synthesized. Among them, methyl 2-carboxy-3,12-dioxooleana-1,9-dien-28-oate showed similar high inhibitory activity (IC50 = 0.8 nM) to 2-cyano-3,12-dioxooleana-1,9-dien-28-oic acid (CDDO), which we have synthesized previously, against production of nitric oxide induced by interferon-gamma in mouse macrophages. (C) 1999 Elsevier Science Ltd. All rights reserved.
Novel Synthetic Oleanane and Ursane Triterpenoids with Various Enone Functionalities in Ring A as Inhibitors of Nitric Oxide Production in Mouse Macrophages
作者:Tadashi Honda、Gordon W. Gribble、Nanjoo Suh、Heather J. Finlay、BarbieAnn V. Rounds、Lothar Bore、Frank G. Favaloro,、Yongping Wang、Michael B. Sporn
DOI:10.1021/jm000008j
日期:2000.5.1
We initially randomly synthesized about 60 oleanane and ursanetriterpenoids as potential anti-inflammatory and cancer chemopreventive agents. Preliminary screening of these derivatives for inhibition of production of nitric oxide induced by interferon-gamma in mouse macrophages revealed that 3-oxooleana-1, 12-dien-28-oic acid (B-15) showed significant activity (IC(50) = 5.6 microM). On the basis of
Electrophilic Triterpenoid Enones: A Comparative Thiol-Trapping and Bioactivity Study
作者:Danilo Del Prete、Orazio Taglialatela-Scafati、Alberto Minassi、Carmina Sirignano、Cristina Cruz、Maria L. Bellido、Eduardo Muñoz、Giovanni Appendino
DOI:10.1021/acs.jnatprod.7b00271
日期:2017.8.25
emerging picture suggests that the triterpenoid scaffold sharply decreases the reactivity of the enone system by steric encumbrance and that only strongly electrophilic and sterically undemanding substituents such as a cyanide or a carboxylate group can re-establish Michael reactivity, albeit in a transient way for the cyanide group. In general, a substantial dissection between the thiol-trapping ability