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Substrate-directed Heterogeneous Hydrogenation of Olefins Using Bimetallic Nanoparticles
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
저자명  
Swann, William A.
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

 008250123s2024        us                              c    eng  d
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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.

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