Zobrazeno 1 - 10 of 570 pro vyhledávání: '"H. Möhrle"'
1
Oxidative Cyclisierungsreaktionen von 1-(3-Nitro-3-phenylpropyl)piperidin
Autor: W. Vetter, H. Möhrle
Publikováno v: Scientia Pharmaceutica
Volume 70
Issue 2
Pages 113-122
Pages 106-115
The title compound 2 - prepared by Komblum reaction - reacted with Hg(II)-edta in a two electron withdrawal to a bicyclic compound 6, which showed in solution an equilibrium of two species probably of diastereomers, which was deduced from NMR-measure
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0a78c7a9013a38c47739a21c854771a6
https://doi.org/10.3797/scipharm.aut-02-13
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3
Chinazolinderivate durch Cyclodehydrierung von N-(2-substituierten Aryl)-Piperidinen / Quinazoline Derivatives by Cyclodehydrogenation of N-(2-Substituted Aryl)-Piperidines
Autor: H. Möhrle, M. Jeandrée
Publikováno v: Zeitschrift für Naturforschung B. 54:1577-1588
Dehydrogenation of the N-[2-(aminocarbonyl)phenyl]piperidines 1 -5 using Hg(II)-EDTA, generated the quinazolinones 6 -9 . Increasing size of the 4-substituent in the piperidine decreased the oxidation rate and the product yield. N-[2-(Hydroxyiminomet
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5c5baa83a0d1f2bd7f79f447051dfaba
https://doi.org/10.1515/znb-1999-1217
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4
Reaktionen von Isochinolinium-Salzen mit Hydroxylamin-Derivaten, 3. Mitteilung. Mechanismus der Aminoxid-Bildung / Reactions of Isoquinolinium Salts with Hydroxylamine Derivatives, 3rd Communication. Mechanism of Amine Oxide Generation
Autor: H. Möhrle, R. Nießen
Publikováno v: Zeitschrift für Naturforschung B. 54:913-922
2-Methylpapaverinium iodide (1) reacted with hydroxylamine to papaverine-N-oxide (2), but without a detectable intermediate and only in moderate yield, caused by the steric hindrance of the 1-substituent. The ring opened product of 2-dinitrophenyliso
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::56c49b3eff8da61cbfb7f0e6111645d3
https://doi.org/10.1515/znb-1999-0715
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5
Reaktionen von Isochinolinium-Salzen mit Hydroxylamin-Derivaten, 2. Mitteilung N-(Alkyl)- und N-(Aryl)-substituierte Verbindungen / Reactions of Isoquinolinium Salts with Hydroxylamine Derivatives, 2nd Communication N-(Alkyl) and N-(Aryl) Substituted Compounds
Autor: H. Möhrle, R. Nießen
Publikováno v: Zeitschrift für Naturforschung B. 54:532-540
The N -alkyl- and N -aryl-isoquinolinium salts 7, 15-17 reacted with free hydroxylamine in pyridine to give the isoquinoline-2-oxide (9) as final product. The intermediate dioximes 8 were isolated and characterized by derivatisation with acetic anhyd
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4d65ac8c36a029a6e0402f851110570a
https://doi.org/10.1515/znb-1999-0417
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6
Cyclisierungen über Enamin-Zwischenstufen bei Amindehydrierungen/Cyclizations via Enamine Intermediates with Amine Dehydrogenations
Autor: H. Möhrle, J. Mehrens
Publikováno v: Zeitschrift für Naturforschung B. 54:214-224
The mercury-edta dehydrogenation of the 4′-aminosubstituted-acetophenones 1, 8a and 9a produced the ring cleavaged derivatives 7 ,11a and 12a, while the piperidine and its derivatives 10a - 10e gave rise to tetracyclic compounds 16a - 16e and to me
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::455c2506ecda1181928ba7994ab3794e
https://doi.org/10.1515/znb-1999-0210
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7
Reaktionen von Isochinolinium-Salzen mit Hydroxylamin-Derivaten, 1. Mitteilung. N-(Nitrophenyl)-substituierte Verbindungen/Reactions of Isoquinolinium Salts with Hydroxylamine Derivatives, 1st Communication. N-(Nitrophenyl) Substituted Compounds
Autor: H. Möhrle, R. Nießen
Publikováno v: Zeitschrift für Naturforschung B. 54:225-233
N-(Nitrophenyl) substituted isoquinolinium salts reacted with nucleophiles of the hydroxylamine type to different products depending on the electron withdrawing strength of the substituent. Mononitro compound 8 produced only the cyclic hydroxylamine
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bc7a5d598b8d58a39f7341f98bd76704
https://doi.org/10.1515/znb-1999-0211
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8
Nachbargruppenbeteiligung bei der Dehydrierung cyclischer Amine vom Typ o-substituierter Anilinderivate / Neighbourgroup Participation with the Dehydrogenation of Cyclic Amines of the o-Substituted Aniline Type
Autor: H. Möhrle, J. Mehrens
Publikováno v: Zeitschrift für Naturforschung B. 53:1369-1378
The 2-Aminobenzylalcohols la - c produced with mercury-edta dehydrogenation the lactams 6a - c; the pipecoline 2b yielded the benzoxazine 3b indicating the participation of the nucleophilic hydroxymethyl group. The 2-aminobenzaldehydes showed a diffe
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1ba5ea5b89a155e68c1f6b8de5ea63e1
https://doi.org/10.1515/znb-1998-1123
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9
1,3-Dioxolane von N-substituierten 4-Piperidonen als Dehydrierungssubstrat / 1,3-Dioxolanes of N-Substituted 4-Piperidones as Substrates for Dehydrogenations
Autor: M. Jeandrée, H. Möhrle
Publikováno v: Zeitschrift für Naturforschung B. 52:72-78
The applicability of ketals was examined for masking the carbonyl group in N-tertiary 4-piperidones during the dehydrogenation using mercury-edta. Various 1,3-dioxolanes showed a different behaviour in dependence on the N-substituent. With simple ali
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ce0475a0a3b9af6dda407651db07bfbf
https://doi.org/10.1515/znb-1997-0115
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10
Heterocyclische Spirocyclohexadienone aus substituierten Phenolen / Heterocyclic Spirocyclohexadienones from Substituted Phenols
Autor: H. Möhrle, D. Schake
Publikováno v: Zeitschrift für Naturforschung B. 50:1859-1868
Mannich bases were prepared from substituted phenols with aliphatic amines and formaldehyde. Amine exchange with N-methyl-2-naphthylamine followed by a Hofmann Martius rearrangement gave rise to o,o′-amino-hydroxy-diphenylmethane derivatives. Under
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4318fa4ddc8b061b58cc1e6f0a9c0793
https://doi.org/10.1515/znb-1995-1213
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