Zobrazeno 1 - 10
of 161
pro vyhledávání: '"Ralf Miethchen"'
Publikováno v:
European Journal of Inorganic Chemistry. 2018:1302-1308
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5ccfa7a9e9294f73bb7608b6910b7a3e
https://doi.org/10.1002/ejic.201701327
https://doi.org/10.1002/ejic.201701327
Autor:
Carl‐Friedrich Kröger, Ralf Miethchen
Publikováno v:
Zeitschrift für Chemie. 15:135-141
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8e6a185647a47aef6688457d9c9fceaf
https://doi.org/10.1002/zfch.19750150403
https://doi.org/10.1002/zfch.19750150403
Autor:
Ralf Miethchen
Publikováno v:
Zeitschrift für Chemie. 29:425-434
The present review discusses reactions of unprotected and protected carbohydrates in hydrogen fluoride as well as the synthesis of fluorinated carbohydrates by use of anhydrous liquid hydrogen fluoride or Systems containing hydrogen fluoride (e.g. HF
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1926136764618059b358fa1e176d62e8
https://doi.org/10.1002/zfch.19890291202
https://doi.org/10.1002/zfch.19890291202
Publikováno v:
Carbohydrate Research. 341:2641-2652
The dithionite-mediated addition of BrCF(2)Cl to 3,4-di-O-pivaloyl-D-xylal (1) generated preferably 1-CF(2)Cl-substituted products, that is, (2-bromo-2-deoxy-3,4-di-O-pivaloyl-beta-D-xylopyranosyl)-chlorodifluoromethane and (2-deoxy-3,4-di-O-pivaloyl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9058dfc6b19f648c9923a83e24593485
https://doi.org/10.1016/j.carres.2006.08.023
https://doi.org/10.1016/j.carres.2006.08.023
Publikováno v:
Synthesis. 2006:2685-2692
Regioselective one-pot O-silylation reactions of 1,2-O-isopropylidene-α-D-glucofuranose and 1,2-0-isopropylidene-β-D-fructopyranose using bulky oligosilyl groups are described. Some new silylating reagents (oligosilyl bistriflates), which were gene
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0eda68b640000dafb44a066929c6777e
https://doi.org/10.1055/s-2006-942478
https://doi.org/10.1055/s-2006-942478
Publikováno v:
Carbohydrate Research. 341:1758-1763
A convenient two-step strategy is reported for the synthesis of fluorinated optically pure acyclo-C-nucleoside analogues starting from simple glycals. In the first step, benzyl- or p-methoxybenzyl-protected glycals are treated with trifluoroacetic an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fdd9e9aea570772df9c23f0aa4eef27e
https://doi.org/10.1016/j.carres.2006.01.011
https://doi.org/10.1016/j.carres.2006.01.011
Autor:
Anita Wegert, Richard Plantier-Royon, Norbert Hoffmann, Charles Portella, Jean-Bernard Behr, Ralf Miethchen
Publikováno v:
Synthesis. 2006:2343-2348
An efficient procedure was established to synthesize a thymidine analogue bearing an acylsilane function at the 5¢-posi- tion, starting from thymidine in four steps and 58% overall yield. This compound proved to be a valuable intermediate for the sy
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e22920be5bb1a9d2aef3f231c6eabe48
https://doi.org/10.1055/s-2006-942438
https://doi.org/10.1055/s-2006-942438
Publikováno v:
Tetrahedron. 62:3301-3308
The halogenated 1 H -1,2,4-triazole glycosides 6 – 10 were synthesized by BF 3 -activated glycosylation of 3(5)-chloro-1,2,4-triazole ( 2 ), 3,5-dichloro-1,2,4-triazole ( 3 ), 3,5-dibromo-1,2,4-triazole ( 4 ), and 3(5)-bromo-5(3)-chloro-1,2,4-triaz
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::62e3689b073b7b36dbf15ce3db50796e
https://doi.org/10.1016/j.tet.2006.01.053
https://doi.org/10.1016/j.tet.2006.01.053
Autor:
Helmut Reinke, Martin Köckerling, Ralf Miethchen, Stefanie Libnow, Andrea Christiansen, Susanne Wille, Martin Hein
Publikováno v:
Synthesis. :496-508
1.2.4-Triazole nucleoside analogues bonded at N-1 of the base were synthesized by addition of N-halo-3,5-dibromo-1,2,4-triazoles to 1,2-unsaturated carbohydrate derivatives (glycals). Examples are given for l,5-anhydro-3,4,6-tri-O-acetyl-2-deoxy-D-ar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2b1e3912af1cfb36c9e22f0eccb2288c
https://doi.org/10.1055/s-2006-926281
https://doi.org/10.1055/s-2006-926281
Publikováno v:
Synthesis. 2005:1850-1858
The dithionite-mediated chlorodifluoromethylations of 3,4-di-O-acetyl-1,5-anhydro-2,6-dideoxy-L-arabino-hex-1-enitol (1), 1,5-anhydro-2,3,4-tri-O-pivaloyl-D-erythro-pent-1-enitol (13), 2,3,4-tri-O-acetyl-1,5-anhydro-6-deoxy-L-lyxo-hex-1-enitol (15),
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a9ae4dc44603218ee0c0579d4b28fb29
https://doi.org/10.1055/s-2005-865361
https://doi.org/10.1055/s-2005-865361