Photoorganocatalytic One-Pot Synthesis of Hydroxamic Acids from Aldehydes
作者:Giorgos N. Papadopoulos、Christoforos G. Kokotos
DOI:10.1002/chem.201600333
日期:2016.5.10
An efficient one‐pot synthesis of hydroxamicacids from aldehydes and hydroxylamine is described. A fast, visible‐light‐mediated metal‐free hydroacylation of dialkyl azodicarboxylates was used to develop the subsequent addition of hydroxylamine hydrochloride. A range of aliphatic and aromatic aldehydes were employed in this reaction to give hydroxamicacids in high to excellent yields. Application
Combination therapy is disclosed herein for the treatment an arthritic condition (e.g. rheumatoid arthritis, osteoarthritis or psoriatic arthritis). The therapies disclosed herein comprise administering tranilast or an analogous compound in combination with a pharmaceutical agent, such as a non-steroidal anti-inflammatory drug, a disease-modifying drug, a COX-2 inhibitor, an antibiotic, an analgesic or combination thereof.
Photoinduced one-pot synthesis of hydroxamic acids from aldehydes through in-situ generated silver nanoclusters
作者:Yasser M. A. Mohamed、Yasser A. Attia、Eirik Johansson Solum
DOI:10.1007/s11164-018-3549-z
日期:2018.12
Hydroxamic acids have attracted significant attention due to their widespread use in applied chemistry. In this report, a modified Angeli–Rimini method has been achieved via the visible light-mediated catalytic transformation of a variety of heterocyclic, aromatic and aliphatic aldehydes 1a–j to their corresponding hydroxamic acids 2a–j in 81–93% yield. The unique ability of vitamin K3 as a photoredox
异羟肟酸由于在应用化学中的广泛应用而引起了极大的关注。在本报告中,通过可见光介导的各种杂环,芳族和脂肪族醛1a–j到其相应的异羟肟酸2a–j的可见光催化转化,实现了改良的Angeli–Rimini方法,产率为81–93%。已经研究了维生素K 3作为光氧化还原催化剂的独特能力,以加速全新反应机制的发展并能够构建具有挑战性的碳氮键。首次表明维生素K 3和醛是快速原位还原Ag +的主要原因离子进入具有2.87 eV带隙能量且尺寸小于2 nm的催化光致发光Ag纳米簇。已经提出了该反应的机理,并得到了紫外-可见,TEM,ESI / MS,FT-IR,1 H NMR和13 C NMR分析的支持。所研究的方法利用了容易获得的试剂,并以高收率生产了异羟肟酸,而没有形成副产物,使其简单,实用且具有成本效益。