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Mechanism of the Aza-Piancatelli Reaction: Scope and Limitations of Furan Substitution in Donor–Acceptor Stenhouse Adduct Synthesis
[Image: see text] The aza-Piancatelli reaction has been widely used to synthesize donor–acceptor Stenhouse adducts (DASAs), a new class of molecular photoswitches with unique properties. However, the substitution pattern of furan cores has been limited to position 3, as 3,4-disubstituted furans rema...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2022
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9261078/ https://www.ncbi.nlm.nih.gov/pubmed/35811875 http://dx.doi.org/10.1021/acsomega.2c02439 |
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author | Peñín, Beatriz Sanosa, Nil Sampedro, Diego Funes-Ardoiz, Ignacio |
author_facet | Peñín, Beatriz Sanosa, Nil Sampedro, Diego Funes-Ardoiz, Ignacio |
author_sort | Peñín, Beatriz |
collection | PubMed |
description | [Image: see text] The aza-Piancatelli reaction has been widely used to synthesize donor–acceptor Stenhouse adducts (DASAs), a new class of molecular photoswitches with unique properties. However, the substitution pattern of furan cores has been limited to position 3, as 3,4-disubstituted furans remain unreactive. Herein, we explore the aza-Piancatelli reaction mechanism using density functional theory (DFT) calculations to understand the influence of the different substituents on the reactivity. We found that all the reaction pathways are kinetically accessible, but the driving force of the reaction is lost in disubstituted furans due to the loss of conjugation in the DASA products. Finally, a simple model is proposed to guide the design of synthetic routes using this reaction. |
format | Online Article Text |
id | pubmed-9261078 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-92610782022-07-08 Mechanism of the Aza-Piancatelli Reaction: Scope and Limitations of Furan Substitution in Donor–Acceptor Stenhouse Adduct Synthesis Peñín, Beatriz Sanosa, Nil Sampedro, Diego Funes-Ardoiz, Ignacio ACS Omega [Image: see text] The aza-Piancatelli reaction has been widely used to synthesize donor–acceptor Stenhouse adducts (DASAs), a new class of molecular photoswitches with unique properties. However, the substitution pattern of furan cores has been limited to position 3, as 3,4-disubstituted furans remain unreactive. Herein, we explore the aza-Piancatelli reaction mechanism using density functional theory (DFT) calculations to understand the influence of the different substituents on the reactivity. We found that all the reaction pathways are kinetically accessible, but the driving force of the reaction is lost in disubstituted furans due to the loss of conjugation in the DASA products. Finally, a simple model is proposed to guide the design of synthetic routes using this reaction. American Chemical Society 2022-06-16 /pmc/articles/PMC9261078/ /pubmed/35811875 http://dx.doi.org/10.1021/acsomega.2c02439 Text en © 2022 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/). |
spellingShingle | Peñín, Beatriz Sanosa, Nil Sampedro, Diego Funes-Ardoiz, Ignacio Mechanism of the Aza-Piancatelli Reaction: Scope and Limitations of Furan Substitution in Donor–Acceptor Stenhouse Adduct Synthesis |
title | Mechanism of the Aza-Piancatelli Reaction: Scope and
Limitations of Furan Substitution in Donor–Acceptor Stenhouse
Adduct Synthesis |
title_full | Mechanism of the Aza-Piancatelli Reaction: Scope and
Limitations of Furan Substitution in Donor–Acceptor Stenhouse
Adduct Synthesis |
title_fullStr | Mechanism of the Aza-Piancatelli Reaction: Scope and
Limitations of Furan Substitution in Donor–Acceptor Stenhouse
Adduct Synthesis |
title_full_unstemmed | Mechanism of the Aza-Piancatelli Reaction: Scope and
Limitations of Furan Substitution in Donor–Acceptor Stenhouse
Adduct Synthesis |
title_short | Mechanism of the Aza-Piancatelli Reaction: Scope and
Limitations of Furan Substitution in Donor–Acceptor Stenhouse
Adduct Synthesis |
title_sort | mechanism of the aza-piancatelli reaction: scope and
limitations of furan substitution in donor–acceptor stenhouse
adduct synthesis |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9261078/ https://www.ncbi.nlm.nih.gov/pubmed/35811875 http://dx.doi.org/10.1021/acsomega.2c02439 |
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