Zobrazeno 1 - 10 of 17 pro vyhledávání: '"Elsa de Opazo"'
1
STRATEGIES FOR THE SYNTHESIS OF ENANTIOMERICALLY PURE MEDIUM-SIZED CARBOCYCLES FROM CARBOHYDRATES
Autor: José Marco-Contelles, Elsa de Opazo
Publikováno v: Journal of Carbohydrate Chemistry. 21:201-218
A series of strategies (the Pauson–Khand reaction and the 1,3-dipolar cycloaddition reaction) have been analyzed in order to develop new and original synthetic protocols for the synthesis of enantiomerically pure medium-sized carbocycles. The intra
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::35e0e8cbadb05bd7e136b4856d7c81c3
https://doi.org/10.1081/car-120004333
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2
Synthesis of higher-carbon sugars by addition of organometallic reagents to aldehydes or lactols derived from carbohydrates
Autor: José Marco-Contelles, Elsa de Opazo, Nieves Arroyo
Publikováno v: Tetrahedron. 57:4729-4739
The addition of different Grignard or lithium organometallic reagents to lactols (1, 6, 21) or aldehydes (10), derived from d -glucose or d -mannose, to give the new higher-carbon sugars (2, 3, 7–9, 13–19, 22 and 23) is reported.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ea625b62373859edf657590ca2e482b4
https://doi.org/10.1016/s0040-4020(01)00410-0
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3
SOME UNEXPECTED RESULTS IN DONDONI'S ONE-CARBON HOMOLOGATION PROCEDURE1
Autor: José Marco-Contelles, Elsa de Opazo
Publikováno v: Journal of Carbohydrate Chemistry. 20:637-646
The formation of the unexpected secondary products (3 and 9) during Dondoni's one-carbon homologation of 6-deoxy-6-iodo-2,3:4,5-bis-O-isopropylidene-D-glucose (1) are described.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::82496d40c6d7719b2233b9211abbc5d5
https://doi.org/10.1081/car-100108278
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4
Intramolecular alkylation of ε-iodo, α-alkoxy aldehydes
Autor: Elsa de Opazo, José Marco-Contelles
Publikováno v: Tetrahedron Letters. 41:5507-5510
The base-mediated intramolecular alkylation of 6-deoxy-6-iodo-2,3:4,5-di- O -isopropylidene- d -glucose ( 2 ) leading to the polyfunctionalized cyclopentane 4 is described.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9fcf5b4c0a6f33594c1f4decfb63cab2
https://doi.org/10.1016/s0040-4039(00)00838-8
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5
Synthesis of chiral, densely functionalized medium-sized rings from carbohydrate precursors via regioselective exo/endo-primary alkyl radical cyclizations
Autor: Elsa de Opazo, José Marco-Contelles
Publikováno v: Tetrahedron Letters. 41:5341-5345
The first 8-endo-trig and 7-exo-dig carbocyclizations of primary alkyl free radicals on acyclic carbohydrate templates derived from d-glucose, leading to chiral and polyfunctionalized medium-sized carbocycles are described. # 2000 Elsevier Science Lt
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::54197892eb3571bcd230e3b16e5fceed
https://doi.org/10.1016/s0040-4039(00)00837-6
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6
Chiral, densely functionalized cycloheptanes from carbohydrates. I. The nitrone route
Autor: Elsa de Opazo, José Marco-Contelles
Publikováno v: Tetrahedron Letters. 40:4445-4448
The first intramolecular 1,3-dipolar cycloaddition of an acyclic, chiral, polyfunctionalized 7-alkenyl tethered N -benzyl nitrone is reported. This is a new and efficient approach for the synthesis of chiral, densely functionalized cycloheptanes from
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6b0539819327c67b3ca3ab99e35f1937
https://doi.org/10.1016/s0040-4039(99)00769-8
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8
ChemInform Abstract: Cycloheptenols from Carbohydrates
Autor: Elsa de Opazo, José Marco-Contelles
Publikováno v: ChemInform. 31
The first ring-closing metathesis of chiral, polyoxygenated, differently O -substituted, acyclic 1,8-nonadienes is reported. Compared with other methods, this is one of the best synthetic alternatives for the preparation of enantiomerically pure, hig
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::866bc2c0d122e6c990ad0432e717763a
https://doi.org/10.1002/chin.200027196
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9
ChemInform Abstract: Synthesis of Higher-Carbon Sugars by Addition of Organometallic Reagents to Aldehydes or Lactols Derived from Carbohydrates
Autor: Nieves Arroyo, José Marco-Contelles, Elsa de Opazo
Publikováno v: ChemInform. 32
The addition of different Grignard or lithium organometallic reagents to lactols (1, 6, 21) or aldehydes (10), derived from d -glucose or d -mannose, to give the new higher-carbon sugars (2, 3, 7–9, 13–19, 22 and 23) is reported.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bbaf2b7de5ec44b5da91c56ea7d6346c
https://doi.org/10.1002/chin.200140200
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10
ChemInform Abstract: Free-Radical Mediated Synthesis of Enantiomerically Pure, Highly Functionalized Inositols from Carbohydrates
Autor: José Marco-Contelles, Carmen Pozuelo, Elsa de Opazo
Publikováno v: ChemInform. 32
We report the synthesis, free-radical cyclization of precursors 1,2,7-trideoxy-7-iodo-3,4:5,6-di- O -isopropylidene- d - gluco -hept-1-enitol ( 1 ), methyl 7- O -acetyl-6- O -benzyl-8-bromo-2,3,8-trideoxy-4,5- O -isopropylidene- d - gluco -oct-2-enon
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cf40880d975378362486fb4e97dd0559
https://doi.org/10.1002/chin.200141219
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