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Substrate-directed Heterogeneous Hydrogenation of Olefins Using Bimetallic Nanoparticles
Substrate-directed Heterogeneous Hydrogenation of Olefins Using Bimetallic Nanoparticles
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211152752
- ISBN
- 9798342123235
- DDC
- 600
- 서명/저자
- Substrate-directed Heterogeneous Hydrogenation of Olefins Using Bimetallic Nanoparticles
- 발행사항
- [Sl] : Purdue University, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 354 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-04, Section: B.
- 주기사항
- Advisor: Li, Christina W.;Bart, Suzanne Doucette;Marinero-Caceres, Ernesto;Wei, Alexander.
- 학위논문주기
- Thesis (Ph.D.)--Purdue University, 2024.
- 초록/해제
- 요약Directed hydrogenation, in which product geometric selectivity is dictated by the binding of an ancillary directing group on the substrate to the catalyst, is typically achieved by homogeneous Rh and Ir complexes. No heterogeneous catalyst has been able to achieve equivalently high directivity due to a lack of control over substrate binding orientation at the catalyst surface. In this work, we demonstrate through structure-activity studies that careful control of surface ensemble geometry in bimetallic nanoparticle catalysts can confer hydroxyl-directed selectivity in heterogeneous double bond hydrogenation. We postulate that the oxophilic alloy component binds hydroxyl groups to pre-orient the molecule on the surface, while proximal noble metal atoms impart facially selective addition of hydride to the olefin. We found that controlling the degree of surface alloying between oxophilic and noble metal component as well as alloy component identity is critical to maximizing reaction selectivity and starting material conversion. Our optimized catalysts exhibit good functional group tolerance on a variety of cyclohexenol and cyclopentenol scaffolds, with Pd-Cu and Pt-Ni systems being developed for the diastereoselective hydrogenation of tri- and more challenging tetra-substituted olefins, respectively. The applicability of this method is then demonstrated in a four-step synthesis of a fine fragrance compound, (1R,2S)- (+)-cis-methyldihydrojasmonate (Paradisone®), with high yield and enantiopurity.
- 일반주제명
- Hydrogen
- 일반주제명
- Alcohol
- 일반주제명
- Particle size
- 일반주제명
- Hydrogenation
- 일반주제명
- Catalysis
- 일반주제명
- Alloys
- 일반주제명
- Nanoparticles
- 일반주제명
- Natural products
- 일반주제명
- Solvents
- 일반주제명
- Adsorption
- 일반주제명
- Materials science
- 일반주제명
- Nanotechnology
- 일반주제명
- Organic chemistry
- 기타저자
- Purdue University.
- 기본자료저록
- Dissertations Abstracts International. 86-04B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520250211152752
■006m o d
■007cr#unu||||||||
■020 ▼a9798342123235
■035 ▼a(MiAaPQ)AAI31532266
■035 ▼a(MiAaPQ)Purdue26326543
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a600
■1001 ▼aSwann, William A.
■24510▼aSubstrate-directed Heterogeneous Hydrogenation of Olefins Using Bimetallic Nanoparticles
■260 ▼a[Sl]▼bPurdue University▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a354 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-04, Section: B.
■500 ▼aAdvisor: Li, Christina W.;Bart, Suzanne Doucette;Marinero-Caceres, Ernesto;Wei, Alexander.
■5021 ▼aThesis (Ph.D.)--Purdue University, 2024.
■520 ▼aDirected hydrogenation, in which product geometric selectivity is dictated by the binding of an ancillary directing group on the substrate to the catalyst, is typically achieved by homogeneous Rh and Ir complexes. No heterogeneous catalyst has been able to achieve equivalently high directivity due to a lack of control over substrate binding orientation at the catalyst surface. In this work, we demonstrate through structure-activity studies that careful control of surface ensemble geometry in bimetallic nanoparticle catalysts can confer hydroxyl-directed selectivity in heterogeneous double bond hydrogenation. We postulate that the oxophilic alloy component binds hydroxyl groups to pre-orient the molecule on the surface, while proximal noble metal atoms impart facially selective addition of hydride to the olefin. We found that controlling the degree of surface alloying between oxophilic and noble metal component as well as alloy component identity is critical to maximizing reaction selectivity and starting material conversion. Our optimized catalysts exhibit good functional group tolerance on a variety of cyclohexenol and cyclopentenol scaffolds, with Pd-Cu and Pt-Ni systems being developed for the diastereoselective hydrogenation of tri- and more challenging tetra-substituted olefins, respectively. The applicability of this method is then demonstrated in a four-step synthesis of a fine fragrance compound, (1R,2S)- (+)-cis-methyldihydrojasmonate (Paradisone®), with high yield and enantiopurity.
■590 ▼aSchool code: 0183.
■650 4▼aHydrogen
■650 4▼aAlcohol
■650 4▼aParticle size
■650 4▼aHydrogenation
■650 4▼aCatalysis
■650 4▼aAlloys
■650 4▼aNanoparticles
■650 4▼aNatural products
■650 4▼aSolvents
■650 4▼aAdsorption
■650 4▼aMaterials science
■650 4▼aNanotechnology
■650 4▼aOrganic chemistry
■690 ▼a0794
■690 ▼a0652
■690 ▼a0490
■71020▼aPurdue University.
■7730 ▼tDissertations Abstracts International▼g86-04B.
■790 ▼a0183
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17163778▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


