Výsledky vyhledávání - "Nicolò Vivona"

Synthesis of Amino-1,2,4-triazoles by Reductive ANRORC Rearrangements of 1,2,4-Oxadiazoles

Autor: Silvestre Buscemi, Andrea Pace, Antonio Palumbo Piccionello, Annalisa Guarcello, Nicolò Vivona

Publikováno v: The Journal of Organic Chemistry. 75:8724-8727

The reaction of various 1,2,4-oxadiazoles with an excess of hydrazine in DMF has been investigated. 3-Amino- 1,2,4-triazoles are produced through a reductive ANRORC pathway consisting of the addition of hydrazine to the 1,2,4-oxadiazole followed by r

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bc2eb51196183985bed1fe5290cc66da
https://doi.org/10.1021/jo102049r

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Experimental and DFT Studies on Competitive Heterocyclic Rearrangements. 3. A Cascade Isoxazole−1,2,4-Oxadiazole−Oxazole Rearrangement

Autor: Silvestre Buscemi, Andrea Pace, Nicolò Vivona, Paola Pierro, Giampaolo Barone

Publikováno v: The Journal of Organic Chemistry. 74:351-358

The thermal rearrangements of 3-acylamino-5-methylisoxazoles 1 have been investigated under basic and neutral conditions and interpreted with the support of computational data. The density functional theory (DFT) study on the competitive routes avail

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::af43157cfe1789ce6d10ed919c17a45f
https://doi.org/10.1021/jo802081k

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Experimental and DFT Studies on Competitive Heterocyclic Rearrangements. Part 2:1 A One-Atom Side-Chain versus the Classic Three-Atom Side-Chain (Boulton−Katritzky) Ring Rearrangement of 3-Acylamino-1,2,4-oxadiazoles

Autor: Nicolò Vivona, Silvestre Buscemi, Andrea Pace, Giampaolo Barone, Ivana Pibiri, Antonio Palumbo Piccionello

Publikováno v: The Journal of Organic Chemistry. 72:7656-7666

The experimental investigation of the base-catalyzed rearrangements of 3-acylamino-1,2,4-oxadiazoles evidenced a new reaction pathway which competes with the well-known ring-degenerate Boulton-Katritzky rearrangement (BKR). The new reaction consists

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1decb0e6d3202acf64a0d77fcadf6441
https://doi.org/10.1021/jo701306t

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Fluorinated Heterocyclic Compounds. An Effective Strategy for the Synthesis of Fluorinated Z-Oximes of 3-Perfluoroalkyl-6-phenyl-2H-1,2,4-triazin- 5-ones via a Ring-Enlargement Reaction of 3-Benzoyl-5-perfluoroalkyl-1,2,4-oxadiazoles and Hydrazine

Autor: Gabriella Macaluso, Gianluca Giorgi, Domenico Spinelli, Andrea Pace, Antonio Palumbo Piccionello, Nicolò Vivona, Silvestre Buscemi

Publikováno v: The Journal of Organic Chemistry. 70:3288-3291

The reaction of 3-benzoyl-5-perfluoroalkyl-1,2,4-oxadiazoles with hydrazine has been investigated, evidencing the possibility of competitive reaction paths. Nucleophilic addition of the hydrazine to the electrophilic C(5) of the 1,2,4-oxadiazole ring

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bb5f63d2372d8bd22c856834f4cd541f
https://doi.org/10.1021/jo047766s

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Photochemistry of Fluorinated Heterocyclic Compounds. An Expedient Route for the Synthesis of Fluorinated 1,3,4-Oxadiazoles and 1,2,4-Triazoles

Autor: Luciana Malpezzi, Silvestre Buscemi, Nicolò Vivona, Ivana Pibiri, Andrea Pace

Publikováno v: The Journal of Organic Chemistry. 69:4108-4115

The photochemistry of some 3-N-alkylamino-5-perfluoroalkyl-1,2,4-oxadiazoles in the presence of nitrogen nucleophiles such as ammonia and primary and secondary aliphatic amines has been investigated. The primary photolytic intermediate from the cleav

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::97ef0e8eff48e4c3f6b0d18556940df4
https://doi.org/10.1021/jo049814e

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Fluorinated Heterocyclic Compounds− The First Example of an Irreversible Ring-Degenerate Rearrangement on Five-Membered Heterocycles by Attack of an External Bidentate Nucleophile

Autor: Silvestre Buscemi, Nicolò Vivona, Camilla Zaira Lanza, Domenico Spinelli, Ivana Pibiri, Andrea Pace

Publikováno v: European Journal of Organic Chemistry. 2004:974-980

The reactions of 5-perfluoroalkyl-1,2,4-oxadiazoles 3 with hydroxylamine in DMF give the regioisomeric 3-perfluoroalkyl-1,2,4-oxadiazoles 4 in excellent yields. This process is the first example of ring-degenerate rearrangement (RDR) occurring on fiv

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c473a4d46641608f5c23a3c12f852932
https://doi.org/10.1002/ejoc.200300737

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Photoinduced functionalization of diterpenes: transformation of the C-20 methyl of atractyligenin into a carbomethoxymethyl or carbamoylmethyl group

Autor: Silvestre Buscemi, Nicolò Vivona, Sergio Rosselli, Maurizio Bruno, Franco Piozzi

Publikováno v: Scopus-Elsevier

Irradiation of the nor-diterpene atractyligenin 1a and of its methyl ester 1b at λ=254 nm in methanol or in methanol in the presence of nitrogen nucleophiles such as ammonia or methylamine gave, besides the decarboxylation product 2, the ester 3a or

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fa224b0986ec682b896656ff49610561
https://doi.org/10.1016/s1010-6030(02)00373-8

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Fluorinated Heterocyclic Compounds. An Expedient Route to 5-Perfluoroalkyl-1,2,4-triazoles via an Unusual Hydrazinolysis of 5-Perfluoroalkyl-1,2,4-oxadiazoles: First Examples of an ANRORC-Like Reaction in 1,2,4-Oxadiazole Derivatives

Autor: Andrea Pace, Silvestre Buscemi, Ivana Pibiri, Nicolò Vivona, Domenico Spinelli

Publikováno v: The Journal of Organic Chemistry. 68:605-608

The hydrazinolysis reaction of 5-perfluoroalkyl-1,2,4-oxadiazoles has been investigated. Nucleophilic addition of the reagent to the C(5)-N(4) double bond of the oxadiazole ring, followed by ring-opening and then ring-closure involving the beta-nitro

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::884c497b5a729e170973f73e81d562de
https://doi.org/10.1021/jo0262762

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