O-alkylhydroxylamines as rationally-designed mechanism-based inhibitors of indoleamine 2,3-dioxygenase-1
摘要:
Indoleamine 2,3-dioxygenase-1 (IDO1) is a promising therapeutic target for the treatment of cancer, chronic viral infections, and other diseases characterized by pathological immune suppression. Recently important advances have been made in understanding IDO1's catalytic mechanism. Although much remains to be discovered, there is strong evidence that the mechanism proceeds through a heme-iron bound alkylperoxy transition or intermediate state. Accordingly, we explored stable structural mimics of the alkylperoxy species and provide evidence that such structures do mimic the alkylperoxy transition or intermediate state. We discovered that O-benzylhydroxylamine, a commercially available compound, is a. potent sub-micromolar inhibitor of IDO1. Structure activity studies of over forty derivatives of O-benzylhydroxylamine led to further improvement in inhibitor potency, particularly with the addition of halogen atoms to the meta position of the aromatic ring. The most potent derivatives and the lead, O-benzylhydroxylamine, have high ligand efficiency values, which are considered an important criterion for successful drug development. Notably, two of the most potent compounds demonstrated nanomolar-level cell-based potency and limited toxicity. The combination of the simplicity of the structures of these compounds and their excellent cellular activity makes them quite attractive for biological exploration of IDO1 function and antitumor therapeutic applications. (C) 2015 Elsevier Masson SAS. All rights reserved.
Synthesis and Fungicidal Activity of 12-Alkoxyiminothiopentadecanlactones
作者:Chen Meng、Jian-jun Li、Xiao-mei Liang、Jian-jun Zhang、Dao-quan Wang
DOI:10.1080/10426507.2014.884095
日期:2014.10.3
series of novel 12-alkoxyiminothiopentadecanlactones were synthesized starting from 2-nitrocyclododecanone by Michael addition to acrolein, followed by selective reduction of the aldehyde group, conversion of hydroxyl group to mercapto group, ringexpansion, Nef reaction, and finally reaction with alkoxyamines. Their structures were confirmed by 1H NMR, 13C NMR spectra, and mass spectrometry. The Z and E
图形摘要 摘要 以 2-硝基环十二酮为原料,通过迈克尔加成到丙烯醛,然后选择性还原醛基,羟基转化为巯基,扩环,Nef 反应,最后与 2-硝基环十二烷酮反应,合成了一系列新型 12-烷氧基亚氨基硫代十五烷内酯。烷氧基胺。它们的结构经 1H NMR、13C NMR 谱和质谱证实。一些标题化合物的 Z 和 E 异构体通过柱色谱分离,它们的构型通过 1 H NMR 确定。这些化合物对天门冬青霉表现出优异的杀真菌活性,并且优于商业杀真菌剂百菌清。
Synthesis and anti-tumor activity evaluation of salinomycin C20-<i>O</i>-alkyl/benzyl oxime derivatives
Seventeen C20-O-alkyl/benzyl oximederivatives were synthesized by a concise and effective method. Most of these derivatives showed tens to several hundred nanomolar IC50 values against HT-29 colorectal, HGC-27 gastric and MDA-MB-231 breast cancer cells, whose antiproliferative activity is 15–240 fold better than that of salinomycin. The C20-oxime etherified derivatives can coordinate potassium ions
There is provided an insecticidal composition comprising, in admixture with an agriculturally acceptable carrier, an insecticidally effective amount of a tetrahydroquinazoline compound of the formula ##STR1## wherein R, R.sup.1, R.sup.2, R.sup.3, R.sup.5, R.sup.6, R.sup.7, R.sup.8, and R.sup.9 are as defined herein, and methods of using the same. Certain novel substituted-phenyl tetrahydroquinazoline compounds per se are also identified.
Structure–Activity Relationship of 3-Methylcytidine-5′-α,β-methylenediphosphates as CD73 Inhibitors
作者:Mirko Scortichini、Riham Mohammed Idris、Susanne Moschütz、Antje Keim、Veronica Salmaso、Clemens Dobelmann、Paola Oliva、Karolina Losenkova、Heikki Irjala、Samuli Vaittinen、Jouko Sandholm、Gennady G. Yegutkin、Norbert Sträter、Anna Junker、Christa E. Müller、Kenneth A. Jacobson
DOI:10.1021/acs.jmedchem.1c01852
日期:2022.2.10
We recently reported N4-substituted 3-methylcytidine-5′-α,β-methylenediphosphates as CD73 inhibitors, potentially useful in cancer immunotherapy. We now expand the structure–activityrelationship of pyrimidine nucleotides as human CD73 inhibitors. 4-Chloro (MRS4598 16; Ki = 0.673 nM) and 4-iodo (MRS4620 18; Ki = 0.436 nM) substitution of the N4-benzyloxy group decreased Ki by ∼20-fold. Primary alkylamine
我们最近报道了N 4取代的 3-甲基胞苷-5'-α,β-亚甲基二磷酸作为 CD73 抑制剂,可能用于癌症免疫治疗。我们现在扩展了嘧啶核苷酸作为人类 CD73 抑制剂的结构-活性关系。 N 4 -苄氧基的4-氯(MRS4598 16 ; K i = 0.673 nM)和4-碘(MRS4620 18 ; K i = 0.436 nM)取代使K i降低约20倍。通过具有不同亚甲基链长度( 24和25 )的对氨基基团偶联的伯烷基胺衍生物是官能化同系物,用于随后与载体或报告基团缀合。具有两种抑制剂的 hCD73 的 X 射线结构表明核糖环构象适应,并且苄氧基亚氨基( E构型)与腺嘌呤抑制剂中的N 4 -苄基结合到相同的区域(C 端和 N 端结构域之间) 。分子动力学确定了稳定的相互作用并预测了构象多样性。因此,通过N 4 -苄氧基取代,我们大大增强了抑制效力并增加了分子探针的功能。通过原位阻断肿瘤组织中的
Development of Non-Ethoxypropanoic Acid Type Cryptochrome Inhibitors with Circadian Molecular Clock-Enhancing Activity by Bioisosteric Replacement
作者:Yong Uk Jeong、Hyo-Eon Jin、Hye Young Lim、Goyeong Choi、Hansol Joo、Bohun Kang、Ga-Hyun Lee、Kwang-Hyeon Liu、Han-Joo Maeng、Sooyoung Chung、Gi Hoon Son、Jong-Wha Jung
DOI:10.3390/ph14060496
日期:——
closely associated with an increased risk of various diseases. Considering that molecular clock machinery serves as an intrinsic time-keeping system underlying the circadian rhythm of biological processes, the modulation of the molecular clock machinery is an attractive therapeutic target with novel mechanisms of action. Based on the previous structure–activity relationship study of small molecule cryptochrome