Zobrazeno 1 - 10 of 12 pro vyhledávání: '"Walden S. Lester"'
1
The Rearrangement Route to 2-Azabicyclo[2.1.1]hexanes. Solvent and Electrophile Control of Neighboring Group Participation
Autor: Yuhong Fang, Deepa Rapolu, Guoliang Lin, Philip E. Sonnet, Seth B. Herzon, Walden S. Lester, Grant R. Krow
Publikováno v: The Journal of Organic Chemistry. 68:5292-5299
The reactions of N-(alkoxycarbonyl)-2-azabicyclo[2.2.0]hex-5-enes 5 with halonium ion electrophiles were studied in polar and nonpolar aprotic solvents and also in protic media with the aim of controlling nitrogen neighboring group participation. Spe
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8d8b905ac89a27b058a4d26ee044f863
https://doi.org/10.1021/jo034394z
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4
ChemInform Abstract: Synthesis of Novel 2-Azabicyclo[2.2.0]- and [2.1.1]hexanols
Autor: Kevin C. Cannon, Walden S. Lester, Yen Nguyen, Jing Yuan, Jingqi Duo, Grant R. Krow, Nian Liu, Amanda Hiller, Seth B. Herzon
Publikováno v: ChemInform. 32
Methyl- and phenyl-substituted N-(ethoxycarbonyl)-2-azabicyclo[2.2.0]hex-5-enes 6 were reacted with NBS in wet DMSO to afford bromohydrins. Mixtures of unrearranged 6-exo-bromo-5-endo-hydroxy-2-azabicyclo[2.2.0]hexanes 7a,b and rearranged 5-anti-brom
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a913d37c71d74ca092e85a21f114820f
https://doi.org/10.1002/chin.200128095
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7
Chlorosulfonyl Isocyanate Reactions with N-(Alkoxycarbonyl)-2-azabicyclo[2.2.0]hex-5-enes. Regiospecific Two-Atom Insertion Pathways
Autor: Walden S. Lester, Yuhong Fang, Guoliang Lin, Grant R. Krow, Patrick J. Carroll
Publikováno v: ChemInform. 34
Addition of the uniparticulate electrophile chlorosulfonyl isocyanate to the nitrogen atom of N-(alkoxycarbonyl)-2-azabicyclo[2.2.0]hex-5-enes 1 is followed by ring cleavage and recombination. The parent 4-methyl, 5-methyl, 5-bromo, and 5-phenyl azab
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::51555c06529bb465e27faedca007bf12
https://doi.org/10.1002/chin.200326171
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8
2-Azabicyclo[2.1.1]hexanes. 2. Substitutent effects on the bromine-mediated rearrangement of 2-azabicyclo[2.2.0]hex-5-enes
Autor: Nian Liu, Seth B. Herzon, David E. Zacharias, Jing Yuan, Yen Nguyen, Yoon B. Lee, Walden S. Lester, Grant R. Krow, Jingqi Duo
Publikováno v: The Journal of organic chemistry. 66(5)
Methyl- and phenyl-substituted N-(ethoxycarbonyl)-2-azabicyclo[2.2.0]hex-5-enes 6 have been prepared by photoirradiation of appropriately substituted 1,2-dihydropyridines. Torquoselectivity is observed in the synthesis of the 3-endo-methyl- and 3-end
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1026a6bd53d3eeabe11bd8fb5a6b1eb6
https://pubmed.ncbi.nlm.nih.gov/11262131
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9
Synthesis of novel 2-azabicyclo[2.2.0]- and [2.1.1]hexanols
Autor: Walden S. Lester, Yen Nguyen, Grant R. Krow, Seth B. Herzon, Kevin C. Cannon, Jing Yuan, Nian Liu, Amanda Hiller, Jingqi Duo
Publikováno v: The Journal of organic chemistry. 66(5)
Methyl- and phenyl-substituted N-(ethoxycarbonyl)-2-azabicyclo[2.2.0]hex-5-enes 6 were reacted with NBS in wet DMSO to afford bromohydrins. Mixtures of unrearranged 6-exo-bromo-5-endo-hydroxy-2-azabicyclo[2.2.0]hexanes 7a,b and rearranged 5-anti-brom
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::633bba7a4aeb9db91c74b986296485ff
https://pubmed.ncbi.nlm.nih.gov/11262132
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