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Metal-Metal Cooperativity Effects in Synthesis and Catalysis

合成和催化中的金属-金属协同效应

基本信息

批准号：
1665015
负责人：
David Michaelis
金额：
$ 35.13万
依托单位：
Brigham Young University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2017
资助国家：
美国
起止时间：
2017-07-01 至 2021-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1665015&HistoricalAwards=false
关键词：
Metal Cooperativity Effects Synthesis Catalysis

项目摘要

Metal-Metal Cooperativity Effects in Synthesis and CatalysisDeveloping new catalysts to convert simple and abundant raw materials into important chemicals and pharmaceuticals is essential for a sustainable and responsible chemical industry. Efficient and selective catalytic processes lower both the cost and waste associated with chemical synthesis. Inspired by natural metal-containing enzymes, Dr. Michaelis is developing new catalysts that contain two distinct metal centers. The two metals work cooperatively to achieve much more efficient catalysis than that of a single metal. Understanding how this process occurs is enabling the application of this strategy to a broad number of catalytic reactions. Dr. Michaelis is also actively involved in recruiting and retaining promising high school and undergraduate students, including women, into science, technology, and engineering (STEM) majors. These efforts are involving students in research, service, and outreach opportunities within the STEM field at an early stage of their career. The activities include summer internships at the high school and college freshman levels.Transition-metal catalyzed reactions represent a hallmark of modern organic synthesis and play a critical role in areas ranging from basic synthetic research to large scale manufacturing. Traditional ligand design in transition metal catalysis seeks to control reaction mechanism, reactivity, and catalyst lifetime by varying the electronic and steric properties of organic supporting ligands. Ligands that contain a second metal represent a conceptually distinct approach to catalyst design because metal-metal cooperativity can impact the reactivity, mechanism, and selectivity of catalysts in unique ways. Despite significant efforts to synthesize and characterize bimetallic complexes, their application to organic synthesis remains relatively unexplored. In addition, it remains unclear to what extent metal-metal interactions can enable mechanistically distinct reaction pathways. With funding support from the Chemical Synthesis Program of the Chemistry Division, Dr. Michaelis is developing strategies to investigate the impact of M-M interactions on reactivity and mechanism in synthetic transformations. These goals are being achieved by (1) synthesizing new titanium-containing ligands, including chiral enantiopure ligands, and investigating the assembly of electrophilic Ti-M (M = Ni, Pd, Pt) heterobimetallic catalysts for olefin and C-H activation reactions, and (2) Synthesizing (NHC)Ni-M2 complexes (NHC = N-heterocyclic carbene) and investigating the impact of M2 in Ni-catalyzed cross coupling reactions. Dr. Michaelis is also actively involved in STEM outreach activities, including high school and undergraduate research internships, and is developing a freshman mentoring program for chemistry and biochemistry majors. This mentoring program is ensuring that a diverse group of undergraduate students participate in undergraduate research, outreach, and service opportunities within the STEM field.

金属-金属协同作用在合成和催化中的作用开发新的催化剂将简单而丰富的原料转化为重要的化学品和药品是可持续和负责任的化学工业的必要条件。高效和选择性的催化过程降低了与化学合成相关的成本和废物。受天然含金属酶的启发，Michaelis博士正在开发含有两个不同金属中心的新型催化剂。这两种金属协同工作，实现比单一金属更有效的催化。了解这一过程是如何发生的，可以将这一策略应用于大量的催化反应。Michaelis博士还积极参与招募和留住有前途的高中和本科生，包括女性，进入科学，技术和工程（STEM）专业。这些努力让学生在职业生涯的早期阶段就参与STEM领域的研究、服务和拓展机会。这些活动包括在高中和大学新生阶段的暑期实习。过渡金属催化反应是现代有机合成的一个标志，在从基础合成研究到大规模生产等领域发挥着关键作用。传统的过渡金属催化配体设计寻求通过改变有机支撑配体的电子和空间性质来控制反应机理、反应活性和催化剂寿命。含有第二种金属的配体代表了一种概念上独特的催化剂设计方法，因为金属-金属协同性可以以独特的方式影响催化剂的反应性、机理和选择性。尽管在合成和表征双金属配合物方面做出了巨大的努力，但它们在有机合成中的应用仍然相对未被探索。此外，目前尚不清楚金属-金属相互作用在多大程度上可以实现机械上不同的反应途径。在化学部化学合成项目的资助下，Michaelis博士正在研究M-M相互作用对合成转化反应性和机理的影响。这些目标通过(1)合成新的含钛配体，包括手性对映纯配体，并研究亲电Ti-M （M = Ni, Pd, Pt）杂双金属催化剂在烯烃和碳氢活化反应中的组装；(2)合成（NHC）Ni-M2配合物（NHC = n杂环碳），并研究M2对Ni催化的交叉偶联反应的影响。Michaelis博士还积极参与STEM外展活动，包括高中和本科研究实习，并正在为化学和生物化学专业的新生制定指导计划。该指导计划确保不同群体的本科生参与STEM领域的本科研究、推广和服务机会。

项目成果

期刊论文数量（9）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

2-Phosphinoimidazole Ligands: N–H NHC or P–N Coordination Complexes in Palladium-Catalyzed Suzuki–Miyaura Reactions of Aryl Chlorides

DOI：
10.1021/acs.organomet.1c00165
发表时间：
2021-06
期刊：
Organometallics
影响因子：
2.8
作者：
Erin E. Martinez;Alexandra J. S. Larson;Sydney K. Fuller;Kathryn M. Petersen;Stacey J. Smith;D. Michaelis
通讯作者：
Erin E. Martinez;Alexandra J. S. Larson;Sydney K. Fuller;Kathryn M. Petersen;Stacey J. Smith;D. Michaelis

Monosubstituted, Anionic Imidazolyl Ligands from N−H NHC Precursors and Their Activity in Pd‐Catalyzed Cross‐Coupling Reactions

来自 N·H NHC 前体的单取代阴离子咪唑基配体及其在 Pd 催化交叉偶联反应中的活性

DOI：
10.1002/adsc.202000483
发表时间：
2020
期刊：
Advanced Synthesis & Catalysis
影响因子：
5.4
作者：
Martinez, Erin E.;Jensen, Christopher A.;Larson, Alexandra J. S.;Kenney, Karissa C.;Clark, Kyle J.;Nazari, S. Hadi;Valdivia‐Berroeta, Gabriel A.;Smith, Stacey J.;Ess, Daniel H.;Michaelis, David J.
通讯作者：
Michaelis, David J.

Experiment and Theory of Bimetallic Pd-Catalyzed α-Arylation and Annulation for Naphthalene Synthesis

DOI：
10.1021/acscatal.1c02731
发表时间：
2021-08-05
期刊：
ACS CATALYSIS
影响因子：
12.9
作者：
Ence, Chloe C.;Martinez, Erin E.;Michaelis, David J.
通讯作者：
Michaelis, David J.

Effect of Precatalyst Oxidation State in C–N Cross-Couplings with 2-Phosphinoimidazole-Derived Bimetallic Pd(I) and Pd(II) Complexes

预催化剂氧化态对 2-膦基咪唑衍生双金属 Pd(I) 和 Pd(II) 配合物 C−N 交叉偶联的影响

DOI：
10.1021/acs.organomet.1c00315
发表时间：
2021
期刊：
Organometallics
影响因子：
2.8
作者：
Martinez, Erin E.;Moreno, Mariur Rodriguez;Barksdale, Caleb A.;Michaelis, David J.
通讯作者：
Michaelis, David J.

Synthesis of chiral titanium-containing phosphinoamide ligands for enantioselective heterobimetallic catalysis