Dual Catalytic Asymmetric Photoredox Coupling of alpha- Keto Radicals
Dual Catalytic Asymmetric Photoredox Coupling of alpha- Keto Radicals
批准号:
9402436
负责人:
Nicholas A White
金额:
$0.27万
依托单位国家:
美国
项目类别:
财政年份:
2016
资助国家:
美国
项目状态:
已结题
起止时间:
2016-08-15 至 2019-08-14
关键词:
AttentionBeerBiologicalBiosensorCatalysisChemicalsChemistryComplexCopperCoupledCouplingDevelopmentDiagnosisDiseaseEffectivenessElectronicsElectronsEnsureEnvironmentEventGlassIndolesIndustrializationIronKetonesLawsLigandsLightLiteratureMasksMetalsMethodologyMethodsModernizationModificationMono-SOrganic SynthesisOxidantsOxidation-ReductionOxidesPatternPharmaceutical PreparationsPharmacologic SubstancePhotonsPhotosensitivityPlanet EarthProcessProductionProductivityPropertyReactionRecording of previous eventsReducing AgentsResearchRouteRunningSlideSocietiesSourceSurfaceSystemTargeted ResearchTestingTherapeuticTimecatalystchemical reactionchemical synthesiscost effectiveenantiomerenolatehuman diseaseinnovationinterestmillimeternext generationoxidationpreventtoolwasting
中文摘要
项目总结:
现代世界依赖于化学技术来为人类提供各种各样的基本材料。尤其是
重要的是广泛使用化学合成技术来产生具有生物学意义的重要化合物,以预防、诊断和治疗癌症。
并治疗这种疾病。因此,当务之急是使这些治疗过程成为安全、可持续、安全和经济高效的治疗方法。
可能的方法,以确保该油田的长期生产率。全球最常用的技术中,有两个是通过转型来实现的。
这是一种氧化和还原反应。最近,一种光氧化还原催化技术已经被证明是一种新的技术。
为促进这些反应的发生提供了强大的工具工具。光氧化还原催化技术具有使用安全、温和、高效和安全的优点。
可持续的终端氧化剂或光还原剂与少量的光敏催化剂配合使用。
此外,铁和铜是地球上丰富的贵金属,它们已经被证明对各种有用的金属产生了影响。
氧化和反应。然而,如果铁被氧化,铜被氧化,则不能与光氧化还原催化作用相结合。
化学计量比的金属和废物是可以绕过的,而更多更可持续的新工艺将会出现。这是一个非常重要的问题。
氧化和反应是由铜元素和铁元素促进的,是一种自由基团,与吲哚偶联。
取代吲哚,并用烯烃类化合物取代自由基烯醇式偶联化合物,以提供1,4-二酮类化合物。
与铜和铁有关的氧化剂非常丰富,但由于这些问题的存在,没有任何其他催化作用的例子。
与化学计量比的铜元素和铁元素的使用相关联,催化和不对称反应方法学与这些方法相结合。
化学计量比氧化剂非常罕见。它是通过使用一种价格低廉的终端氧化剂来重新氧化铜或铁,即手性。
也可以在主要的金属中心上使用配体,以使不对称性影响更多的键的形成。
布赫瓦尔德能源集团在开发催化裂化反应方面拥有丰富的历史经验,这些技术对推动全球工业发展非常有用。
学术领域。为了更好地开发一种新型的烯烃类化合物的不对称双催化氧化技术,以实现与催化剂的偶联。
吲哚类化合物和烯烃类化合物,我们将首先探索它的外消旋反应,并在未来几年内催化大量的铜和铁的反应。
一种重要的光催化剂的存在和一种化学计量的终端氧化剂的存在。这曾经是一种外消旋反应,但至今仍未发生。
在开发和理解的基础上,我们将继续探索在铜和铁的表面上使用手性配体的方法,以更好地生成蛋白质。
不对称疏水偶联反应。我们还将在照片流中探索这一化学实验的具体实施方案。
反应堆。最后,这种反应将不会被用作通过照片构图来影响表面修饰的工具。
本文提出的这项研究提出了一种全新的创新方法,以解决催化裂化技术面临的主要挑战。
氧化与铁和铜有关。此外,更重要的是,更多的催化铜或铜的使用将不会为更好的实施创造条件。
反应的不对称偶联是通过手性配体的广泛使用来实现的,而不对称偶联反应的实现是通过光催化氧化还原与铁的偶联来实现的。
而对于铜的氧化和化学,这些已经具有有用的化学反应的元素将不会变得显著和更强大。
此外,随着催化氧化技术的进一步发展,将使这些反应的更多应用前景变得更加广阔。
多样化的化学合成系统适用于化学合成和材料合成。
英文摘要
PROJECT SUMMARY
The modern world relies upon chemistry to provide a variety of essential materials. Of particular
importance is the use of chemical synthesis to generate biologically relevant compounds to prevent, diagnose,
and treat disease. It is imperative to render these processes as safe, sustainable, and cost-effective as
possible to ensure the long-term productivity of this field. Two of the most commonly utilized transformations to
this end are oxidation and reduction reactions. Recently, photoredox catalysis has been shown to be a
powerful tool to facilitate these reactions. Photoredox catalysis has the benefit of utilizing safe, mild, and
sustainable terminal oxidants or reductants in conjunction with a small amount of photosensitive catalyst.
Furthermore, iron and copper are earth abundant metals that have been shown to effect a variety of useful
oxidation reactions. However, if iron and copper oxidation reactions can be coupled with photoredox catalysis,
stoichiometric metal waste can be circumvented and more sustainable processes will emerge. An important
oxidation reaction promoted by copper and iron is the radical enolate coupling with indoles to furnish
substituted indoles and the radical enolate coupling with enolates to furnish 1,4-dikeontes. The literature
pertaining to copper and iron oxidation is rich, however no catalytic examples exist. Due to the issues
associated with stoichiometric use of copper and iron, catalytic asymmetric methodologies with these
stoichiometric oxidants are rare. By using an inexpensive terminal oxidant to re-oxidize copper or iron, chiral
ligands may be employed on the metal centers to impart asymmetry on the bond formation.
The Buchwald group has a history of developing catalytic reactions that are useful to the industrial and
academic arenas. In order to develop an asymmetric dual catalytic oxidation of enolates to to couple with
indoles and enolates we will first explore the racemic reaction with catalytic amounts of copper or iron in the
presence of a photocatalyst and stoichiometric terminal oxidant. Once the racemic reaction has been
developed and understood, we will explore the use of chiral ligands on copper and iron to generate an
asymmetric enolate coupling reaction. We will also explore the implementation of this chemistry in photo-flow
reactors. Finally, this reaction will be used as a tool effect surface modification through photo-patterning.
The research proposed herein presents an innovative approach to solving the challenges of catalytic
oxidation with iron and copper. Furthermore, the use of catalytic copper or iron will allow for the implementation
of asymmetric coupling reactions through the use of chiral ligands. By coupling photoredox catalysis with iron
and copper oxidation chemistry, these already useful reactions will become significantly more powerful.
Furthermore, the development of catalytic oxidations will allow for the application of these reactions to more
diverse systems for chemical and material synthesis.
期刊论文(0)
专著(0)
科研奖励(0)
会议论文
海外基金