New Carbon-based Ligands for Hydroamination and olefin metathesis catalysts

用于加氢胺化和烯烃复分解催化剂的新型碳基配体

• 批准号: 8111911
• 负责人: GUY BERTRAND
• 金额: $ 36.52万
• 依托单位: UNIVERSITY OF CALIFORNIA RIVERSIDE
• 依托单位国家: 美国
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-08-01 至 2012-07-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/8111911
• 关键词: Academia; Address; Alkenes; Alkynes; Amines; Ammonia; Area; Attention; Behavior; Carbon; Catalysis; Chemicals; Collaborations; Complex; Coupling; Development; Electronics; Electrons; Environment; Family; Funding; Goals; Hand; Health; Industry; Isomerism; Lead; Ligands; Metals; Modification; Nature; Nitrogen; Palladium; Phosphines; Phosphorus; Preparation; Process; Property; Reaction; Reactive Nitrogen Species; Reporting; Research; Ruthenium; Skeleton; Technology; Therapeutic; Transition Elements; Work; base; carbene; catalyst; design; electron donor; improved; metal complex; novel; propadiene; scaffold; success; tool

DESCRIPTION (provided by applicant): Efficient and selective preparation of organic molecules is critical for the synthesis of therapeutics. Many of the most proficient known processes depend on the availability of catalysts. One of the advantages of organometallic catalysis is the ability to tune the activity and selectivity through modification of the ligands around the metal center. Recently, major advances have been reported thanks to the use of electron-rich phosphines and cyclic diaminocarbenes. We have uncovered several novel families of stable carbenes, such as the cyclic (alkyl)(amino)carbenes and the diaminocyclopropenylidenes, which behave as even more electron-donating ligands. They have already allowed for improving known palladium and ruthenium catalyzed processes, and even for promoting new metal catalyzed reactions. The full catalytic potential of complexes bearing these carbene ligands will be investigated. In order to obtain even more robust and efficient transition-metal catalysts, novel types of carbon-based ligands, which surpass the electron donating properties imposed by any other ligands, will be prepared. Special attention will be drawn on families of ligands for which it will be possible to precisely tune the steric and electronic parameters. There is a high demand for technology to produce therapeutics in a pure enantiomeric form, thus optically active versions of our new ligands will be prepared. The studies will be focused on catalytic processes for which real difficulties remain, and on chemical transformations, which have not yet been achieved, but are of critical importance for building the skeleton of complex molecules. Cascade reactions that involves several reactants, yet a single catalyst, and which lead to biologically relevant heterocycles and to important synthons will be developed. To accelerate the widespread implementation of our ligands, we have already formalized a collaboration with Robert Grubbs at Caltech, and we are looking forward to further partnerships. The ultimate goal of this research effort is to find truly practical catalysts, and catalytic reactions, which will find applications in both industry and academia for the selective synthesis of biologically important compounds. PUBLIC HEALTH RELEVANCE: The success of homogeneous catalysis can largely be attributed to the development of a diverse range of ligand frameworks that have been used to tune the behavior of the various catalysts. In order to obtain robust and efficient transition-metal catalysts, we wish to develop novel types of carbon-based ligands. The ultimate goal of this research effort is to find truly practical catalysts, and catalytic reactions, which will find applications in both industry and academia for the selective synthesis of biologically important compounds.

描述（由申请人提供）：有机分子的有效和选择性制备对于治疗剂的合成至关重要。许多最熟练的已知方法取决于催化剂的可用性。有机金属催化的优点之一是能够通过修饰金属中心周围的配体来调节活性和选择性。最近，由于使用富电子膦和环状二氨基卡宾，已经报道了重大进展。我们已经发现了几个新的家庭稳定的卡宾，如环状（烷基）（氨基）卡宾和二氨基环丙烯叉，表现为更多的供电子配体。它们已经允许改进已知的钯和钌催化的方法，甚至用于促进新的金属催化的反应。将研究带有这些卡宾配体的络合物的全部催化潜力。为了获得更稳定和有效的过渡金属催化剂，将制备新型的碳基配体，其超过任何其他配体所施加的供电子性质。特别注意将提请家庭的配体，它将有可能精确地调整的空间和电子参数。对以纯对映体形式生产治疗剂的技术有很高的需求，因此将制备我们的新配体的光学活性形式。这些研究将侧重于仍然存在真实的困难的催化过程，以及尚未实现但对构建复杂分子骨架至关重要的化学转化。级联反应，涉及几个反应物，但一个单一的催化剂，并导致生物相关的杂环和重要的candonons将被开发。为了加速配体的广泛应用，我们已经与加州理工学院的Robert Grubbs正式合作，我们期待着进一步的合作伙伴关系。这项研究工作的最终目标是找到真正实用的催化剂和催化反应，这将在工业和学术界找到应用，用于选择性合成生物重要化合物。公共卫生关系：均相催化的成功在很大程度上归功于各种配体框架的发展，这些配体框架已用于调节各种催化剂的行为。为了获得稳定有效的过渡金属催化剂，我们希望开发新型的碳基配体。这项研究工作的最终目标是找到真正实用的催化剂和催化反应，这将在工业和学术界找到应用，用于选择性合成生物重要化合物。