Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Uwe Stelzer"'
Publikováno v:
Tetrahedron: Asymmetry. 9:1043-1049
A technical scale preparation of optically active (1 R , cis ,α S )-cypermethrine 4 from racemic m -phenoxybenzaldehyde cyanohydrin acetate ( RS )- 1 and (1 R , cis )-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylic acid chloride (1 R , cis
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e271baf63bae50143b221b3c86c9327b
https://doi.org/10.1016/s0957-4166(98)00047-0
https://doi.org/10.1016/s0957-4166(98)00047-0
Publikováno v:
Tetrahedron: Asymmetry. 7:607-618
(S)-2- Azidonitriles (S)- 4 are easily accessible from (R)-2- (sulfonyloxy)nitriles (R)- 2 by nucleophilic substitution with alkali azides 3 under complete inversion of configuration. The azidonitriles (S)- 4 can be converted by catalytic hydrogenati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::91155c506dc06fefa44a4fc85c4e6bc5
https://doi.org/10.1016/0957-4166(96)00044-4
https://doi.org/10.1016/0957-4166(96)00044-4
Autor:
Uwe Stelzer, Franz Effenberger
Publikováno v:
Tetrahedron: Asymmetry. 6:283-286
2-Monosubstituted (S)-aziridines (S)- 3 were obtained by hydrogenation of (R)-2-sulfonyloxynitriles (R)- 2 with LiAlH4 in good chemical yields and high enantiomeric excess.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9a183d4e5e5c700897ce736f33afaa0f
https://doi.org/10.1016/0957-4166(94)00385-o
https://doi.org/10.1016/0957-4166(94)00385-o
Publikováno v:
Liebigs Annalen der Chemie. 1993:1303-1311
Amino Acids, 17. – A New Synthesis of Didehydro Dipeptides and Didehydro Tripeptides Esters of N-phthaloyl-protected (R)- or (S)-didehydro dipeptides 5–7 were obtained in good yields by the perrhenate-catalyzed decomposition of 2-azidocarboxylate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::55a207eadb007f6c44682070ca35b9cd
https://doi.org/10.1002/jlac.1993199301212
https://doi.org/10.1002/jlac.1993199301212
Autor:
Franz Effenberger, Uwe Stelzer
Publikováno v:
Chemische Berichte. 126:779-786
Enzyme-Catalyzed Reactions, 15[1]. – Preparation of (R)1-2-(Sulfonyloxy)nitriles and Their Reactions with Acetates – Inversion of the Configuration of Optically Active Cyanohydrins 2-(Sulfonyloxy)nitriles (R)-6, 7, 8 are obtained in high optical
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::784bc8d8731f509fea419ddd3032789b
https://doi.org/10.1002/cber.19931260332
https://doi.org/10.1002/cber.19931260332
Autor:
Uwe Stelzer, Franz Effenberger
Publikováno v:
Tetrahedron: Asymmetry. 4:161-164
(S)-2-fluoronitriles (S)-4 are obtained in good chemical and high optical yields from (R)-cyanohydrins (R)-2 or (R)-cyanohydrin trimethylsilylethers (R)-3 by fluorination with DAST or by nucleophilic substitution of α-sulfonyloxynitriles (R)-6,7 wit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::12f0fa8dbc60ea2ec148cc89a0d42b75
https://doi.org/10.1016/s0957-4166(00)82327-7
https://doi.org/10.1016/s0957-4166(00)82327-7
Publikováno v:
ChemInform. 25
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8995267295b6924f3992d7ae36c8522c
https://doi.org/10.1002/chin.199411258
https://doi.org/10.1002/chin.199411258
Publikováno v:
ChemInform. 27
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ad613258a306d7ddfdc48ed5ad87fbeb
https://doi.org/10.1002/chin.199629082
https://doi.org/10.1002/chin.199629082
Autor:
Franz Effenberger, Uwe Stelzer
We report here on an important extension of the synthetic potential of optically active cyanohydrins by conversion of the hydroxy group into a good leaving group. Of particular interest are reactions of the cyanohydrin derivatives in which the nitrog
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1aa2ebf6ca5cae202ed31c7fd74cb94d
Autor:
Franz Effenberger, Uwe Stelzer
Publikováno v:
Angewandte Chemie. 103:866-867
Hier berichten wir über eine wichtige Erweiterung des Synthesepotentials optisch aktiver Cyanhydrine durch Uberfiührung der Hydroxygruppe in eine gute Austrittsgruppe. Besonderes Interesse kommt dabei den Reaktionen der Cyanhydrinderivate zu, bei d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::653e2544001c9ccf948122912b5a2406
https://doi.org/10.1002/ange.19911030728
https://doi.org/10.1002/ange.19911030728