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Merging photoredox with organocataly...
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Terrett, Jack Alexander.
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Merging photoredox with organocatalysis and nickel catalysis: Accessing novel mechanistic platforms for C-C and C-O bond formation.
紀錄類型:
書目-電子資源 : Monograph/item
正題名/作者:
Merging photoredox with organocatalysis and nickel catalysis: Accessing novel mechanistic platforms for C-C and C-O bond formation./
作者:
Terrett, Jack Alexander.
出版者:
Ann Arbor : ProQuest Dissertations & Theses, : 2016,
面頁冊數:
361 p.
附註:
Source: Dissertation Abstracts International, Volume: 77-11(E), Section: B.
Contained By:
Dissertation Abstracts International77-11B(E).
標題:
Organic chemistry. -
電子資源:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10120427
ISBN:
9781339816098
Merging photoredox with organocatalysis and nickel catalysis: Accessing novel mechanistic platforms for C-C and C-O bond formation.
Terrett, Jack Alexander.
Merging photoredox with organocatalysis and nickel catalysis: Accessing novel mechanistic platforms for C-C and C-O bond formation.
- Ann Arbor : ProQuest Dissertations & Theses, 2016 - 361 p.
Source: Dissertation Abstracts International, Volume: 77-11(E), Section: B.
Thesis (Ph.D.)--Princeton University, 2016.
This item is not available from ProQuest Dissertations & Theses.
Visible light photoredox catalysis has emerged in recent years as a powerful technique in organic synthesis due to its ability to generate non-traditional sites of reactivity on organic substrates via low-barrier, open-shell pathways. Importantly, the mild conditions employed by photoredox catalysis, particularly the use of low-energy visible light, enable its synergistic merger with diverse catalytic platforms to accomplish previously elusive transformations through a series of single electron transfer events. This thesis describes the successful merger of photoredox catalysis with enamine organocatalysis, hydrogen atom transfer catalysis, and nickel catalysis to accomplish new strategies for C--C and C--O bond formation.
ISBN: 9781339816098Subjects--Topical Terms:
523952
Organic chemistry.
Merging photoredox with organocatalysis and nickel catalysis: Accessing novel mechanistic platforms for C-C and C-O bond formation.
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Visible light photoredox catalysis has emerged in recent years as a powerful technique in organic synthesis due to its ability to generate non-traditional sites of reactivity on organic substrates via low-barrier, open-shell pathways. Importantly, the mild conditions employed by photoredox catalysis, particularly the use of low-energy visible light, enable its synergistic merger with diverse catalytic platforms to accomplish previously elusive transformations through a series of single electron transfer events. This thesis describes the successful merger of photoredox catalysis with enamine organocatalysis, hydrogen atom transfer catalysis, and nickel catalysis to accomplish new strategies for C--C and C--O bond formation.
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In combination with enamine organocatalysis, photoredox catalysis opens up direct beta-functionalization of saturated carbonyls with a wide range of coupling partners, enabling the direct beta-alkylation of aldehydes with Michael acceptor coupling partners. Selective functionalization of strong C--H bonds in the presence of weaker bonds has been demonstrated via a combination of photoredox-mediated hydrogen atom transfer and hydrogen-bonding catalysis. We have developed a novel cross-coupling manifold, through the merger of photoredox and nickel catalysis, whereby native functionality -- such as carboxylic acids and sp3 C--H bonds -- can be employed as latent nucleophiles in cross-coupling. This insight led us to the understanding that photoredox catalysis can modulate nickel oxidation states through single electron transfer events to enable elusive organometallic reactivity. By taking advantage of this oxidation state manipulation, we have been able to switch on a general method for challenging nickel-catalyzed C--O coupling with aryl halides and alcohols.
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