Synthesis and biological evaluation of guanylhydrazone coactivator binding inhibitors for the estrogen receptor
摘要:
Most patients with hormone-responsive breast cancer eventually develop resistance to traditional antiestrogens such as tamoxifen, and this has become a major obstacle in their treatment. We prepared and characterized the activity of a series of 16 guanylhydrazone small molecules that are designed to block estrogen receptor (ER) activity through a non-traditional mechanism, by directly interfering with coactivator binding to agonist-liganded ER. The inhibitory activity of these compounds was determined in cell-based transcription assays using ER-responsive reporter gene and mammalian two-hybrid assays. Several of the compounds gave IC50 values in the low micromolar range. Two secondary assays were used to confirm that these compounds were acting through the proposed non-traditional mode of estrogen inhibitory action and not as conventional antagonists at the ligand binding site. (c) 2008 Elsevier Ltd. All rights reserved.
Synthesis, Antileishmanial Activity and in silico Studies of Aminoguanidine Hydrazones (AGH) and Thiosemicarbazones (TSC) Against Leishmania chagasi Amastigotes
A number of acyl derivatives of guanidines and guanylhydrazones have been synthesized and evaluated for their antibacterial activity. The synthesis of some of the guanidines and guanylhydrazones is discussed.
Iodine Catalyzed Oxidative Coupling of Diaminoazines and Amines for the Synthesis of 3,5-Disubstituted-1,2,4-Triazoles
作者:Aabid A. Wani、Sumit S. Chourasiya、Deepika Kathuria、Subash C. Sahoo、Uwe Beifuss、Prasad V. Bharatam
DOI:10.1021/acs.joc.1c00704
日期:2021.6.4
A simple, convenient, transition metal-free onepotsynthesis of 3,5-disubstituted-1,2,4-triazoles has been established. The innovation in this reaction is the use of easily available 1,1-diaminoazines as substrates. This method provides the products with wider substrate scope, at an expedited rate, and with relatively better yields in comparison to the reported methods. The reaction mechanism involves
已经建立了一种简单、方便、不含过渡金属的 3,5-二取代-1,2,4-三唑的一锅合成方法。该反应的创新之处在于使用容易获得的 1,1-二氨基嗪作为底物。与报道的方法相比,该方法以更快的速度为产品提供了更广泛的底物范围和相对更好的产量。反应机理包括初始分子间亲核加成(由 I 2促进),然后是分子内亲核环化。