Towards a Sequential One-Pot Preparation of 1,2,3-Benzotriazin-4(3<i>H</i>
)-ones Employing a Key Cp*Co(III)-catalyzed C−H Amidation Step
作者:Paula G. Chirila、Lauren Skibinski、Keith Miller、Alex Hamilton、Christopher J. Whiteoak
DOI:10.1002/adsc.201800133
日期:2018.6.15
initial C−H amidation step, leading to the overall development of a facile one‐pot procedure for the preparation of a range of substituted 1,2,3‐benzotriazin‐4(3H)‐one derivatives, requiring only 5 hours of reaction time, which is also applicable on a gram scale. In addition, the key Cp*Co(III)‐catalyzed C−H amidation step has been studied by DFT calculations in order to fully elucidate the mechanism.
1,2,3-苯并三嗪-4(3 H)-一衍生物因其潜在用途而被公认为是农药和药物,因此从易于获得的试剂开始的新制备方法将是一个诱人的主张。各种不同取代的苯甲酰胺很容易获得,它们为直接的CH功能化方案的应用提供了出色的底物支架。在这种情况下,我们在此报告了使用Cp * Co(III)催化剂酰胺化这些苯甲酰胺,使用1,4,2-二恶唑-5-酮作为酰胺化剂。该可分离的中间体2-乙酰氨基苯甲酰胺的产品可随后转化成所需的1,2,3-苯并三嗪-4(3 H ^)通过使用-酮衍生物叔亚硝酸丁酯在温和的条件下。发现可以使用从初始CH酰胺化步骤获得的粗制反应混合物进行第二步,从而全面开发了一种简便的单锅法,用于制备一系列取代的1,2, 3-苯并三嗪-4(3 H)-一衍生物,仅需5个小时的反应时间,也适用于克级。此外,通过DFT计算研究了关键的Cp * Co(III)催化的CH酰胺化步骤,以充分阐明其机理。
Redox Cyclization of Amides and Sulfonamides with Nitrous Oxide for Direct Synthesis of Heterocycles
作者:Zhencheng Lai、Chaorong Wang、Jiaming Li、Sunliang Cui
DOI:10.1021/acs.orglett.0c00397
日期:2020.3.6
Herein we report a redox cyclization of amides and sulfonamides with nitrousoxide (N2O) for the direct synthesis of heterocycles. Various amides and sulfonamides could undergo directed ortho metalation (DoM) by treatment with BuLi, and the lithium intermediate could be trapped by N2O gas to achieve redox cyclization. N2O serves as a N-atom donor to mediate the intramolecular coupling of lithium species
[EN] THERMAL VOLATILIZATION OF ORCO AGONISTS<br/>[FR] VOLATILISATION THERMIQUE D'AGONISTES D'ORCO
申请人:ZWIEBEL LAURENCE J
公开号:WO2017011466A1
公开(公告)日:2017-01-19
In one aspect, the invention relates to chemical modulators of insect olfactory receptors. In particular, compounds and compositions are provided that can inhibit sensory (e.g., host targeting) functions in airborne insects such as mosquitos. Method of employing such agents, and articles incorporating the same, are also provided. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.
[EN] BINARY COMPOSITIONS AS DISRUPTORS OF ORCO-MEDIATED ODORANT SENSING<br/>[FR] COMPOSITIONS BINAIRES UTILISÉES COMME PERTURBATEURS DE DÉTECTION DE SUBSTANCES ODORANTES DÉPENDANT DES RÉCEPTEURS ORCO
申请人:UNIV VANDERBILT
公开号:WO2016154471A1
公开(公告)日:2016-09-29
In one aspect, the invention relates to binary compositions that disrupt ORco- mediated odorant sensing. In particular, compounds and compositions are provided that can inhibit sensory (e.g., host targeting) functions in organisms that express ORco receptors such as airborne insects, e.g., mosquitos, and ticks. Method of employing such agents, and articles incorporating the same, are also provided. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.