基于噻吩并[2,3 - d ]嘧啶-4(3H)-一核的17β-羟基类固醇脱氢酶1型(17β-HSD1)抑制剂的合成及生物学评价
摘要:
许多乳腺肿瘤是激素依赖性的,雌激素,尤其是雌二醇(E2),在其生长和发育中起关键作用。17β-羟基类固醇脱氢酶1(17β-HSD1)是女性性类固醇生物合成中的关键酶,可催化NADPH依赖性雌激素还原为具有生物活性的雌二醇。在这项研究中,合成了一个融合的(di)cycloalkeno thieno [2,3- d ] pyrimidin-4(3 H)-one为基础的化合物的文库,并在无细胞和有毒的条件下针对17β-HSD1的生物活性。对基于细胞的测定进行了评估。几种噻吩并[2,3- d ]嘧啶-4(3 H测试浓度为0.1和1μM的基于1的化合物是有效的17β-HSD1抑制剂。例如,4-(3-羟基苯硫基)-1,2,7,8,9,10,11,13-八氢-13-氧代-[1]苯并噻吩并[2',3':4,5]-嘧啶基[1,2 - a ]氮杂-3-甲醛(7f)是迄今为止最有效的非甾体17β-HSD1抑制剂之一,在0
xanthate-based radicaladdition/cyclization reaction cascade toward 2-biphenylisocyanides is described as a practical and modular approach to 6-alkylated phenanthridines. The use of xanthates as radical precursors allowed the synthesis of diversely 6-substituted phenanthridines. Electrophilicradicals derived from nitriles, aromatic and aliphatic ketones, malonates, and amide derivatives, as well as radicals
A C-3-Selective Direct Alkylation of Coumarins by Using a Microwave-Assisted Xanthate-Based Radical Reaction
作者:Luis D. Miranda、Estefanía Icelo-Ávila、Ángel Rentería-Gómez、Michell Pila、Joaquín G. Marrero
DOI:10.1002/ejoc.201500322
日期:2015.7
A xanthate-based oxidative radical process for the directalkylation of the coumarin ring system is presented. In the reaction, a vinylic and unactivated C–H bond of the coumarin system is replaced by an α-acyl functionality under neutral conditions. This reaction has a high reaction site selectivity, which can realize alkylation at the C-3 position.
Xanthate-based microwave-assisted C H radical functionalization of caffeine, 1,3-dimethyluracil, and imidazo[1,2-a]pyridines
作者:Víctor M. Pérez、Daniela Fregoso-López、Luis D. Miranda
DOI:10.1016/j.tetlet.2017.02.050
日期:2017.3
Xanthate-basedradical chemistry was used for the regioselective directalkylation of caffeine, uracil, and imidazo[1,2-a]pyridine systems, using dilauroyl peroxide as initiator and oxidant, under microwave irradiation. Under these conditions, several electrophilic radicals (located alpha to a carbonyl function such as esters, amides, ketones, malonates and cyano groups) were added to the title heterocyclic
基于黄药的自由基化学用于微波辐射下咖啡因,尿嘧啶和咪唑并[1,2-a]吡啶体系的区域选择性直接烷基化,使用过氧化二月桂酰作为引发剂和氧化剂。在这些条件下,将几个亲电基团(位于羰基官能团的α位,例如酯,酰胺,酮,丙二酸酯和氰基)添加到标题杂环系统中。该方法允许通过芳族取代中的C H官能化由容易获得的起始材料进行sp 2 -sp 3 C C键的分子间区域选择性构建。
Visible light/Ir(III) photocatalytic initiation of xanthate-based radical-chain reactions: Xanthate group transfer and oxidative addition to aromatic systems
作者:Pedro López-Mendoza、John E. Díaz、Alix E. Loaiza、Luis D. Miranda
DOI:10.1016/j.tet.2018.04.079
日期:2018.9
The protocol can be used in classical xanthate-based inter- and intra-molecular group transfer reactions and oxidative radical addition to several heteroaromatic systems. The process does not require high temperature and reactions are cleaner compared with the traditional peroxide initiation. In the oxidative addition to aromatic systems, the oxidation process is part of the catalytic cycle and does
A metal-free synthesis of oxindoles by a radical addition-cyclization onto N-arylacrylamides with xanthates
作者:Shucheng Wang、Xuhu Huang、Bowen Li、Zemei Ge、Xin Wang、Runtao Li
DOI:10.1016/j.tet.2015.01.049
日期:2015.3
A convenient, high yielding synthesis of oxindoles by metal-free di-functionalization of alkenes with xanthates has been developed. This transformation involves a radical addition/cyclization process. Various arylalkylation products including alkyl ester-, benzyl-, cyano-, ketone-, amine-, and amide-substituted oxindoles were prepared in good to excellent yields. (C) 2015 Elsevier Ltd. All rights reserved.