Alkynes as Synthetic Equivalents of Ketones and Aldehydes: A Hidden Entry into Carbonyl Chemistry

The high energy packed in alkyne functional group makes alkyne reactions highly thermodynamically favorable and generally irreversible. Furthermore, the presence of two orthogonal π-bonds that can be manipulated separately enables flexible synthetic cascades stemming from alkynes. Behind these “obvi...

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Published inMolecules (Basel, Switzerland) Vol. 24; no. 6; p. 1036
Main Authors Alabugin, Igor V., Gonzalez-Rodriguez, Edgar, Kawade, Rahul Kisan, Stepanov, Aleksandr A., Vasilevsky, Sergei F.
Format Journal Article
LanguageEnglish
Published Switzerland MDPI AG 15.03.2019
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Abstract The high energy packed in alkyne functional group makes alkyne reactions highly thermodynamically favorable and generally irreversible. Furthermore, the presence of two orthogonal π-bonds that can be manipulated separately enables flexible synthetic cascades stemming from alkynes. Behind these “obvious” traits, there are other more subtle, often concealed aspects of this functional group’s appeal. This review is focused on yet another interesting but underappreciated alkyne feature: the fact that the CC alkyne unit has the same oxidation state as the -CH2C(O)- unit of a typical carbonyl compound. Thus, “classic carbonyl chemistry” can be accessed through alkynes, and new transformations can be engineered by unmasking the hidden carbonyl nature of alkynes. The goal of this review is to illustrate the advantages of using alkynes as an entry point to carbonyl reactions while highlighting reports from the literature where, sometimes without full appreciation, the concept of using alkynes as a hidden entry into carbonyl chemistry has been applied.
AbstractList The high energy packed in alkyne functional group makes alkyne reactions highly thermodynamically favorable and generally irreversible. Furthermore, the presence of two orthogonal π-bonds that can be manipulated separately enables flexible synthetic cascades stemming from alkynes. Behind these "obvious" traits, there are other more subtle, often concealed aspects of this functional group's appeal. This review is focused on yet another interesting but underappreciated alkyne feature: the fact that the CC alkyne unit has the same oxidation state as the -CH2C(O)- unit of a typical carbonyl compound. Thus, "classic carbonyl chemistry" can be accessed through alkynes, and new transformations can be engineered by unmasking the hidden carbonyl nature of alkynes. The goal of this review is to illustrate the advantages of using alkynes as an entry point to carbonyl reactions while highlighting reports from the literature where, sometimes without full appreciation, the concept of using alkynes as a hidden entry into carbonyl chemistry has been applied.
The high energy packed in alkyne functional group makes alkyne reactions highly thermodynamically favorable and generally irreversible. Furthermore, the presence of two orthogonal π-bonds that can be manipulated separately enables flexible synthetic cascades stemming from alkynes. Behind these "obvious" traits, there are other more subtle, often concealed aspects of this functional group's appeal. This review is focused on yet another interesting but underappreciated alkyne feature: the fact that the CC alkyne unit has the same oxidation state as the -CH2C(O)- unit of a typical carbonyl compound. Thus, "classic carbonyl chemistry" can be accessed through alkynes, and new transformations can be engineered by unmasking the hidden carbonyl nature of alkynes. The goal of this review is to illustrate the advantages of using alkynes as an entry point to carbonyl reactions while highlighting reports from the literature where, sometimes without full appreciation, the concept of using alkynes as a hidden entry into carbonyl chemistry has been applied.The high energy packed in alkyne functional group makes alkyne reactions highly thermodynamically favorable and generally irreversible. Furthermore, the presence of two orthogonal π-bonds that can be manipulated separately enables flexible synthetic cascades stemming from alkynes. Behind these "obvious" traits, there are other more subtle, often concealed aspects of this functional group's appeal. This review is focused on yet another interesting but underappreciated alkyne feature: the fact that the CC alkyne unit has the same oxidation state as the -CH2C(O)- unit of a typical carbonyl compound. Thus, "classic carbonyl chemistry" can be accessed through alkynes, and new transformations can be engineered by unmasking the hidden carbonyl nature of alkynes. The goal of this review is to illustrate the advantages of using alkynes as an entry point to carbonyl reactions while highlighting reports from the literature where, sometimes without full appreciation, the concept of using alkynes as a hidden entry into carbonyl chemistry has been applied.
Author Alabugin, Igor V.
Stepanov, Aleksandr A.
Vasilevsky, Sergei F.
Kawade, Rahul Kisan
Gonzalez-Rodriguez, Edgar
AuthorAffiliation 2 Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Science, 630090 Novosibirsk, Russia; stepanov@kinetics.nsc.ru (A.A.S.); vasilev@kinetics.nsc.ru (S.F.V.)
1 Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL 32306, USA; egonzalez@chem.fsu.edu (E.G.-R.); kawaderahul84@gmail.com (R.K.K.)
3 Novosibirsk State University, 2, Pirogova Str., 630090 Novosibirsk, Russia
AuthorAffiliation_xml – name: 3 Novosibirsk State University, 2, Pirogova Str., 630090 Novosibirsk, Russia
– name: 1 Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL 32306, USA; egonzalez@chem.fsu.edu (E.G.-R.); kawaderahul84@gmail.com (R.K.K.)
– name: 2 Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Science, 630090 Novosibirsk, Russia; stepanov@kinetics.nsc.ru (A.A.S.); vasilev@kinetics.nsc.ru (S.F.V.)
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  surname: Alabugin
  fullname: Alabugin, Igor V.
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  givenname: Edgar
  surname: Gonzalez-Rodriguez
  fullname: Gonzalez-Rodriguez, Edgar
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  surname: Kawade
  fullname: Kawade, Rahul Kisan
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  fullname: Stepanov, Aleksandr A.
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  givenname: Sergei F.
  surname: Vasilevsky
  fullname: Vasilevsky, Sergei F.
BackLink https://www.ncbi.nlm.nih.gov/pubmed/30875972$$D View this record in MEDLINE/PubMed
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2019 by the authors. 2019
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Issue 6
Keywords cyclizations
aldehydes
acetals
alkynes
electronic structure
rearrangements
catalysis
condensations
ketones
carbonyl compounds
nucleophilic addition
Language English
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Snippet The high energy packed in alkyne functional group makes alkyne reactions highly thermodynamically favorable and generally irreversible. Furthermore, the...
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SubjectTerms acetals
aldehydes
alkynes
carbonyl compounds
catalysis
Chemistry
condensations
cyclizations
electronic structure
Energy
Hydration
ketones
nucleophilic addition
Oxidation
rearrangements
Review
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  providerName: Directory of Open Access Journals
Title Alkynes as Synthetic Equivalents of Ketones and Aldehydes: A Hidden Entry into Carbonyl Chemistry
URI https://www.ncbi.nlm.nih.gov/pubmed/30875972
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Volume 24
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