Výsledky vyhledávání - "John S. Swenton"

A Facile Entry into Naphthopyran Quinones via an Annelation Reaction of Levoglucosenone. The Total Synthesis of (−)-Hongconin1

Autor: John N. Freskos, John S. Swenton, Peter Dalidowicz, Michael Lester Kerns

Publikováno v: The Journal of Organic Chemistry. 61:459-464

The annelation reactions of levoglucosenone, prepared by pyrolysis of paper, with 3-cyano-1(3H)-isobenzofuranone and 3-cyano-5-methoxy-1(3H)-isobenzofuranone have been studied. Reductive ring-opening of the annelation products with zinc/copper couple

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4e0a321812f42c09b673fbc36bfdbf6a
https://doi.org/10.1021/jo951607e

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Intramolecular Anodic Carbon−Carbon Bond Formation from Oxidized Phenol Intermediates. Effect of Oxygenated Substituents on the Yields of Spiro Dienones in Electrochemical and Iodobenzene Diacetate Oxidations

Autor: Andrew Callinan, Michael Lester Kerns, John S. Swenton, Gary W. Morrow, Y. Chen, Jeffrey J. Rohde

Publikováno v: The Journal of Organic Chemistry. 61:1267-1274

The single-cell, constant-current anodic oxidation of a series of 4-(2-alkenylaryl)phenols was studied in which the aryl substituents were 2-vinyl-4,5-dimethoxy, 6a; 2-propenyl-4,5-dimethoxy, 9a; 2-vinyl-4,5-methylenedioxy, 6b; 2-propenyl-4,5-methyle

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2a99b6d8bc1603599c6a1ab414a0b04d
https://doi.org/10.1021/jo951799d

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Dihydrobenzofuran derivatives via the anodic cycloaddition reaction of p-methoxyphenols and vinyl sulfides

Autor: Michael Lester Kerns, Sean M. Conroy, John S. Swenton

Publikováno v: Tetrahedron Letters. 35:7529-7532

The anodic oxidation of p-methoxyphenols in the presence of vinyl sulfides gives high yields of dihydrobenzofurans arising via a formal 1,3-cycloaddition reaction of the vinyl sulfide and the anodically generated phenoxonium ion.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2d0a4c2fae40d459e0e0e093816b6c4d
https://doi.org/10.1016/s0040-4039(00)78335-3

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The photochemistry of acetylenic ethers. A novel carbon-oxygen to carbon-carbon bond conversion

Autor: Andrew Callinan, John S. Swenton, Bradley A. Smith

Publikováno v: Tetrahedron Letters. 35:2283-2286

Irradiation of acetylenic ethers in methanol gives homologated esters via a formal [1,3]-oxygen-to-carbon migration involving a ketene intermediate.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9db0e79fe9387116a059c777d61a551b
https://doi.org/10.1016/0040-4039(94)85199-9

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Preparation of quinol N-acyl- and quinol ether imines via anodic oxidation of para-substituted anilide derivatives

Autor: John S. Swenton, Timothy N. Biggs, William M. Clark

Publikováno v: The Journal of Organic Chemistry. 58:5607-5614

Anodic oxidation of N-benzoyl-4-methylaniline in 5% aqueous methanol in the presence of sodium bicarbonate affords two major products: 4-methoxy-4-methylbenzoquinol N-benzoylimine, 8a, and a dimer, 4- [N-benzoyl-N-(4-methylphenyl)amino]-4-methylbenzo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b3017ec8175d002366dac46b791e27bd
https://doi.org/10.1021/jo00073a016

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Intramolecular anodic carbon-carbon bond-forming reactions of oxidized phenol intermediates leading to spirodienones. Structural effects on reactivity and evidence for a phenoxonium ion intermediate

Autor: John S. Swenton, Gary W. Morrow, Y. Chen, Michael Lester Kerns, Kenneth Carpenter

Publikováno v: The Journal of Organic Chemistry. 58:3308-3316

Anodic oxidation of 4-phenylphenol in methanol leads to 4-methoxy-4-phenylcyclohexa-2,5-dienones whereas anodic oxidation of 4-(2-alkenylphenyl)-phenols leads to spirocyclic 2,5-cyclohexadienones in competition with methanol addition to the 4-positio

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d03ee6598a6e81b320f880479e0a0c9f
https://doi.org/10.1021/jo00064a017

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The electrochemical preparation and kinetic and product studies of acylated quinol and quinol ether imines. In search of the hydrolysis products of the ultimate carcinogen of N-acetyl-2-aminofluorene

Autor: William M. Clark, Kanchugarakoppal S. Rangappa, Nicholas H. Oberlies, John S. Helmick, Michael Novak, John S. Swenton

Publikováno v: The Journal of Organic Chemistry. 58:867-878

The N-acetyl and benzoyl derivatives of 4-methoxy-4-phenyl-2,5-cyclohexadienonime ine and the N-benzoyl derivative of 4-hydroxy-4-phenyl-2,5-cyclohexadienoimnei ne (la-c) have been prepared via anodic oxidation of the corresponding amide of 4-aminobi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::02efd87bb4c7aa5d8c19e106c7cf2504
https://doi.org/10.1021/jo00056a019

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