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Alkynes to Reactive Intermediates via Cycloaddition Reactions: Structure, Reactivity, and Mechanism
Alkynes to Reactive Intermediates via Cycloaddition Reactions: Structure, Reactivity, and ...
Alkynes to Reactive Intermediates via Cycloaddition Reactions: Structure, Reactivity, and Mechanism

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20250211150944
ISBN  
9798384097662
DDC  
540
저자명  
Xu, Qian.
서명/저자  
Alkynes to Reactive Intermediates via Cycloaddition Reactions: Structure, Reactivity, and Mechanism
발행사항  
[Sl] : University of Minnesota, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
450 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-03, Section: B.
주기사항  
Advisor: Hoye, Thomas R.
학위논문주기  
Thesis (Ph.D.)--University of Minnesota, 2024.
초록/해제  
요약Reactive intermediates are highly reactive molecules featured by having short lifetimes. Their generations, structures, and reactivities are essential to the field of chemistry and have been attracting increasing attention. More often than not, the generation of a reactive intermediate invokes the use of catalysts, reagents, additives or irradiation. Direct generation of reactive intermediates under thermal, uncatalyzed, reagent- additive-free conditions remains a less explored but attractive strategy. The simple and straightforward setup of thermal reactions make it cost-efficient, reproducible, scalable, and practical for synthesis. More importantly, it also provides a platform for the discovery of novel reactivities and enables the construction of complex molecules. An alkyne is a particularly interesting functional group that can be further converted into reactive intermediates. On the one hand, alkynes generally have ample kinetic stability to render them easy to prepare, easy to handle, and shelf-stability that makes many of them commercially available. On the other, alkynes have inherently weak pi-bonds that can provide considerable favorable enthalpic contribution when they participate in a transformation, which can be a pivotal thermodynamic driving force for a thermal reaction. Furthermore, the high degree of unsaturation of an alkyne confers versatile modes of reactivities between alkynes and their reaction partners. These features synergistically make alkynes ideal precursors to reactive intermediates. Yet there remains a gap between alkynes and reactive intermediates, cycloaddition reactions provide a potential bridge for commuting. In this document, I will demonstrate how thermal, additive-free cycloaddition approaches convert alkynes into reactive intermediates including: i) strained reactive intermediates such as benzynes, 1,2,4-cyclohexatrienes, and 6-aza-1,2,4-cylcohexatrienes; ii) bond-deficient reactive intermediates such, a,3-dehydrotoluenes (DHTs), and free carbenes. DFT computations have provided crucial guidance for the reaction design and revealed valuable mechanistic insights across my entire research.
일반주제명  
Chemistry
일반주제명  
Thermodynamics
일반주제명  
Analytical chemistry
일반주제명  
Organic chemistry
키워드  
Cycloaddition reactions
키워드  
Alkynes
키워드  
Reactive intermediates
키워드  
Thermal reaction
키워드  
Carbene
기타저자  
University of Minnesota Chemistry
기본자료저록  
Dissertations Abstracts International. 86-03B.
전자적 위치 및 접속  
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MARC

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■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a540
■1001  ▼aXu,  Qian.
■24510▼aAlkynes  to  Reactive  Intermediates  via  Cycloaddition  Reactions:  Structure,  Reactivity,  and  Mechanism
■260    ▼a[Sl]▼bUniversity  of  Minnesota▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a450  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-03,  Section:  B.
■500    ▼aAdvisor:  Hoye,  Thomas  R.
■5021  ▼aThesis  (Ph.D.)--University  of  Minnesota,  2024.
■520    ▼aReactive  intermediates  are  highly  reactive  molecules  featured  by  having  short  lifetimes.  Their  generations,  structures,  and  reactivities  are  essential  to  the  field  of  chemistry  and  have  been  attracting  increasing  attention.  More  often  than  not,  the  generation  of  a  reactive  intermediate  invokes  the  use  of  catalysts,  reagents,  additives  or  irradiation.  Direct  generation  of  reactive  intermediates  under  thermal,  uncatalyzed,  reagent-  additive-free  conditions  remains  a  less  explored  but  attractive  strategy.  The  simple  and  straightforward  setup  of  thermal  reactions  make  it  cost-efficient,  reproducible,  scalable,  and  practical  for  synthesis.  More  importantly,  it  also  provides  a  platform  for  the  discovery  of  novel  reactivities  and  enables  the  construction  of  complex  molecules.  An  alkyne  is  a  particularly  interesting  functional  group  that  can  be  further  converted  into  reactive  intermediates.  On  the  one  hand,  alkynes  generally  have  ample  kinetic  stability  to  render  them  easy  to  prepare,  easy  to  handle,  and  shelf-stability  that  makes  many  of  them  commercially  available.  On  the  other,  alkynes  have  inherently  weak  pi-bonds  that  can  provide  considerable  favorable  enthalpic  contribution  when  they  participate  in  a  transformation,  which  can  be  a  pivotal  thermodynamic  driving  force  for  a  thermal  reaction.  Furthermore,  the  high  degree  of  unsaturation  of  an  alkyne  confers  versatile  modes  of  reactivities  between  alkynes  and  their  reaction  partners.  These  features  synergistically  make  alkynes  ideal  precursors  to  reactive  intermediates.  Yet  there  remains  a  gap  between  alkynes  and  reactive  intermediates,  cycloaddition  reactions  provide  a  potential  bridge  for  commuting.  In  this  document,  I  will  demonstrate  how  thermal,  additive-free  cycloaddition  approaches  convert  alkynes  into  reactive  intermediates  including:  i)  strained  reactive  intermediates  such  as  benzynes,  1,2,4-cyclohexatrienes,  and  6-aza-1,2,4-cylcohexatrienes;  ii)  bond-deficient  reactive  intermediates  such,  a,3-dehydrotoluenes  (DHTs),  and  free  carbenes.  DFT  computations  have  provided  crucial  guidance  for  the  reaction  design  and  revealed  valuable  mechanistic  insights  across  my  entire  research.
■590    ▼aSchool  code:  0130.
■650  4▼aChemistry
■650  4▼aThermodynamics
■650  4▼aAnalytical  chemistry
■650  4▼aOrganic  chemistry
■653    ▼aCycloaddition  reactions
■653    ▼aAlkynes
■653    ▼aReactive  intermediates
■653    ▼aThermal  reaction
■653    ▼aCarbene
■690    ▼a0485
■690    ▼a0486
■690    ▼a0348
■690    ▼a0490
■71020▼aUniversity  of  Minnesota▼bChemistry.
■7730  ▼tDissertations  Abstracts  International▼g86-03B.
■790    ▼a0130
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17160256▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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