Zobrazeno 1 - 10 of 72 pro vyhledávání: '"U. Kerb"'
1
Zur Synthese des Ecdysons IX. Mitteilung über Insektenhormone
Autor: A. Langemann, Andre Furlenmeier, U. Kerb, Guy Waldvogel, Andor Furst, Rudolf Prof Wiechert, P. Hocks
Publikováno v: Helvetica Chimica Acta. 50:2387-2396
A synthesis of ecdysone is described by which the insect moulting hormone can be readily prepared. Oxidation of ergosterol gave the 6-keto-Δ7-function, and preparation of the Δ2-olefine followed by stereospecific hydroxylation led to the 2β,3β-gl
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fbc7bbc352405c8e803bfe03513c05c6
https://doi.org/10.1002/hlca.19670500825
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2
Zur Synthese des Ecdysons. II. Mitteilung über Insektenhormone Synthesen von 2β, 3β-Dihydroxy-6-keto-A|B-cis-Steroiden
Autor: U. Kerb, Guy Waldvogel, A. Langemann, Andre Furlenmeier, Rudolf Prof Wiechert, Andor Furst, P. Hocks
Publikováno v: Helvetica Chimica Acta. 49:1581-1591
Experiments towards a synthesis of ecdysone (1) ([22R]-2β, 3β, 14, 22, 25-pentahydroxy-5β, 14α-cholest-7-en-6-one) have led to 2β, 3β-dihydroxy-6-keto-5α-steroids. These could be epimerized to the corresponding 5β-series. The proposed configu
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bd703adcd22dbe030c6283a0637d9730
https://doi.org/10.1002/hlca.19660490517
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3
Die synthese des rubrosterons
Autor: Andor Furst, P. Hocks, U. Kerb, Rudolf Wiechert, Andre Furlenmeier
Publikováno v: Tetrahedron Letters. 9:4281-4284
Zusammenfassung Rubrosterone, a steroid with the ecdysone-skeleton recently isolated from the plant Achyranthes rubrofusca Wight , was synthesized from readily available starting material.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::557288364c4ba359fb66b579ee6a9475
https://doi.org/10.1016/s0040-4039(00)76407-0
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5
Configuration and conformation of the A-ring of 1-methyl steroids
Autor: F.A. MacKellar, Rudolf Wiechert, G. Slomp, U. Kerb, W.J. Wechter
Publikováno v: Tetrahedron. 21:1625-1634
A detailed NMR analysis of epimeric pairs of 1-methylated steroids in the A/B cis and Δ4-series has confirmed earlier configurational assignments. One-methyl steroids in the A/B trans series and the 1-methyl hydrocortisone synthesized therefrom are
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::58b75a324ea5916ca997ce4281efc475
https://doi.org/10.1016/s0040-4020(01)98325-5
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6
Über eine synthese des crustecdysons (20-hydroxyecdyson)
Autor: Andre Furlenmeier, Rudolf Wiechert, Andor Furst, U. Kerb
Publikováno v: Tetrahedron Letters. 9:4277-4280
Zusammenfassung A synthesis of crustecdysone, an insect and crustacean moulting hormone, is described in 19 stages starting from progesterone. The key intermediate is 2β, 3β-diacetoxy-5α-pregn-7-ene-6,20-dione.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::428d58707659b8e9f3475818a13f7471
https://doi.org/10.1016/s0040-4039(00)76406-9
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8
Zur Synthese des Ecdysons. IV. Mitteilung über Insektenhormone. Die Synthese des natürlichen Häutungshormons
Autor: Guy Waldvogel, U. Kerb, Andor Furst, P. Hocks, A. Langemann, Andre Furlenmeier, Rudolf Prof Wiechert, G. Schulz
Publikováno v: Helvetica Chimica Acta. 49:1601-1606
Ecdysone (9), a hormone responsible for the skin shedding process of arthropoda, has been synthesized. (20S)-2β,3β-Diacetoxy-20-formyl-5β-pregn-7-en-6-one was prepared from the corresponding carboxylic acid and converted into ecdysone by a GRIGNAR
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9ba37777963e0e84635590d8439c939b
https://doi.org/10.1002/hlca.19660490519
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