Zobrazeno 1 - 7
of 7
pro vyhledávání: '"Klaus Zeitler"'
Publikováno v:
Liebigs Annalen. 1996:103-107
The synthesis of the hitherto unknown aza analog of ascorbic acid (±)-10a is described. Aldol type reaction of the tetramic acid derivative 4 with tert-butyldimethylsilyloxy acetaldehyde furnished a mixture of the aldol (±)-5b and the diastereomeri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1a5670f8311cd4605ace7849264ef22e
https://doi.org/10.1002/jlac.199619960116
https://doi.org/10.1002/jlac.199619960116
Autor:
Hans-Dietrich Stachel, Klaus Zeitler
Publikováno v:
Liebigs Annalen. 1995:2011-2017
The α-thiotetronic acid 1 reacts with amines predominantly with ring opening to give polyfunctionalized ketones (2) which readily cyclize to α-tetramic acid amides (4a, b). The reaction of α-thiotetronate 6 with nucleophiles is more complex, leadi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dc7c8041b81a80a34aabd965a204eb54
https://doi.org/10.1002/jlac.1995199511282
https://doi.org/10.1002/jlac.1995199511282
Autor:
Klaus Zeitler, Hans-Dietrich Stachel
Publikováno v:
Archiv der Pharmazie. 328:99-107
Es wird uber die Synthese der Alkyliden-α-thiotetronsauren 11 und 12a und mehrere ihrer Derivate berichtet. Ausgangsverbindungen sind das 2,3-Dimethoxybernsteinsaure-thioanhydrid (4) sowie Thioacetondicarbonsaureester. Bei der Rhodium(II)-katalysier
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::91ef48d6eb495c1f124997986d3d47e1
https://doi.org/10.1002/ardp.19953280202
https://doi.org/10.1002/ardp.19953280202
Publikováno v:
Liebigs Annalen der Chemie. 1994:1129-1134
Synthesis of Azaanalogues of Ascorbic Acid and Isoascorbic Acid The synthesis of the hitherto unknown azaanalogues of ascorbic acid (±)-10b and isoascorbic acid (±)-10a is described. The aldol-type reaction of the tetramic acid derivative 4 with be
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8c1c27febfb82a09e65a55ea79e83447
https://doi.org/10.1002/jlac.199419941113
https://doi.org/10.1002/jlac.199419941113
Publikováno v:
Liebigs Annalen der Chemie. 1994:129-132
Reductones of Tetronic, Thiotetronic and Tetramic Acids, II. – Reductones by Rhodium-Catalyzed Decomposition of Diazo Compounds The diazoketones 2 have been synthesized by diazo transfer reaction with 2-azido-3-ethylbenzthiazolium tetrafluoroborate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e610a23c31c3563e72cf7d3bc3e20473
https://doi.org/10.1002/jlac.199419940205
https://doi.org/10.1002/jlac.199419940205
Autor:
Klaus Zeitler
Publikováno v:
Kyklos. 21:151-152
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9cf9d54db3dfc1c3696229512ab085bc
https://doi.org/10.1111/j.1467-6435.1968.tb02393.x
https://doi.org/10.1111/j.1467-6435.1968.tb02393.x
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