Inhibitors of histone deacetylases (HDAC) are currently developed for the treatment of cancer. These include compounds with a sulfur containing head group like depsipeptide, alkylthiols, thiocarboxylates, and trithiocarbonates with a carbonyl group in the alpha-position. In the present investigation, we report on the synthesis and comprehensive SAR analysis of HDACinhibitors bearing a tri- or dithiocarbonate
目前已开发出组蛋白脱乙酰基酶(HDAC)抑制剂来治疗癌症。这些包括具有含硫头基的化合物,例如二肽,烷基硫醇,硫代羧酸盐和在α位具有羰基的三硫代碳酸酯。在本研究中,我们报告了带有三硫代或二硫代碳酸酯基序的HDAC抑制剂的合成和综合SAR分析。这样的三硫代碳酸酯可容易地从预制的或原位制备的α-卤代甲基芳基酮获得。显示了已定义类似物的HDAC同种型选择性和底物竞争作用模式。对头基的探索表明,有效抑制HDAC的必要条件是使用二硫代α-羰基基序。确定了高效,底物竞争性HDAC6选择性抑制剂(12ac:IC 50 = 65 nM,K i = 110 nM)。具有氨基喹啉取代的吡啶基-硫代乙酰基帽的三硫代碳酸酯类似物显示出与作为批准的抗癌药物的亚磺酰苯胺异羟肟酸(SAHA)相当的细胞毒性谱和效能。
Metallaphotoredox Decarboxylative Arylation of Natural Amino Acids via an Elusive Mechanistic Pathway
作者:Manivel Pitchai、Antonio Ramirez、Don M. Mayder、Sankar Ulaganathan、Hemantha Kumar、Darpandeep Aulakh、Anuradha Gupta、Arvind Mathur、James Kempson、Nicholas Meanwell、Zachary M. Hudson、Martins S. Oderinde
DOI:10.1021/acscatal.2c05554
日期:2023.1.6
The merger of photoredox and nickelcatalysis for the decarboxylativearylation of carboxylic acids has evolved into an effective strategy to forge C–C bonds from readily available feedstock. Despite its rapid industrial adoption, the mechanism of this dual-catalyzed cross-coupling reaction has remained unclear and under-studied. Here, we propose an alternative mechanism for the photoredox–Ni dual-catalyzed
用于羧酸脱羧芳基化的光氧化还原和镍催化的结合已经发展成为一种有效的策略,可以从现成的原料中形成 C-C 键。尽管在工业上得到迅速采用,但这种双催化交叉偶联反应的机制仍不清楚且研究不足。在这里,基于 Ni II ArBr 络合物的对照实验、循环伏安法 (CV) 和计算研究,我们提出了光氧化还原-Ni 双催化 α-氨基酸脱羧芳基化的替代机制。我们的机理研究表明,Ni 0 –Ni II –Ni I –Ni II –Ni 0循环在双催化 C sp中是可行的2 –C sp 3交叉耦合。与之前的机制建议不同,我们通过一系列 CV 研究和密度泛函理论 (DFT) 计算表明,Ir II将 Ni II ArBr 还原为 Ni I Ar在热力学上是有利的。通过 Ni II物种而不是通过 Ni III进行还原消除DFT 计算也支持 -species。这些机制见解允许将反应范围扩展到包含带有药效元素的 α-氨基酸
Synthesis of Amidomethyltrifluoroborates and Their Use in Cross-Coupling Reactions
作者:Gary A. Molander、Marie-Aude Hiebel
DOI:10.1021/ol102039c
日期:2010.11.5
Amidomethyltrifluoroborates were successfully synthesized in a one-pot fashion and used in cross-coupling reactions with a wide variety of aryl and heteroaryl chlorides.