1963
DOI: 10.1021/jm00339a005
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Some Aspects of the Fate and Relationship of the N-Methyl Group of Morphine to its Pharmacological Activity1a

Abstract: Fate and Relationship of N-Methyl to Activity of Morphine 237 This material gelled in most organic solvents, but was recrystallized from about 5 1. of dioxane 3 times and once from 3.5 1. of chloroform to obtain white waxy crystals, m.p. 120-122°. Other close analogs showed the same tendency to gel in most organic solvents at conventional concentrations.Acknowledgments.-We are grateful to Dr. D. B. Seeley for the fermentative preparation of the epoxy-succinic acid, to Dr. S. Y. P'an for measuring hypnotic acti… Show more

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Cited by 60 publications
(11 citation statements)
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“…A series of normal urine samples gave fluorescence equivalent to 9-25 ng warfarin, 0-2 ng alcohol 1, 1-9 ng alcohol 2, 10-180 ng 6-hydroxywarfarin, and 4-11 ng 7-hydroxywarfar-in per ml urine. 3 The concentrations of phenylbutazone were measured by the method of Jahnchen and Levy (14). The relative amounts of free and protein-bound warfarin were measured in the following manner: 10 ,ug of ["C]warfarin (sp act 3.74,Ci per mg) were added to each ml of plasma samples obtained during the control and phenylbutazone studies, and the plasma samples were incubated at 370C for 2 h. (The fraction bound was not altered by addition of this amount of radioactive warfarin.)…”
Section: Analytical Proceduresmentioning
confidence: 99%
“…A series of normal urine samples gave fluorescence equivalent to 9-25 ng warfarin, 0-2 ng alcohol 1, 1-9 ng alcohol 2, 10-180 ng 6-hydroxywarfarin, and 4-11 ng 7-hydroxywarfar-in per ml urine. 3 The concentrations of phenylbutazone were measured by the method of Jahnchen and Levy (14). The relative amounts of free and protein-bound warfarin were measured in the following manner: 10 ,ug of ["C]warfarin (sp act 3.74,Ci per mg) were added to each ml of plasma samples obtained during the control and phenylbutazone studies, and the plasma samples were incubated at 370C for 2 h. (The fraction bound was not altered by addition of this amount of radioactive warfarin.)…”
Section: Analytical Proceduresmentioning
confidence: 99%
“…To introduce deuterium into 1 a modification of the method described by Elison et al was used. 2 1 was converted to 17-ethoxycarbonyl-6-methoxy-morphinan (4) with ethyl-chloroformate in chloroform under reflux. From traces of 1, 4 was purified by chromatography and reduced with lithium aluminium deuteride in tetrahydrofuran to obtain 1a, which again could be purified by chromatography.…”
Section: Resultsmentioning
confidence: 99%
“…[49] Neben CYPs produzieren auch andere humane Stoffwechselenzyme,w ie beispielsweise die Aldehydoxidase (AO) [50] und die Monoaminoxidasen (MAOs), [51] messbare KIEs.Dieser Effekt wird zur Quantifizierung der Aktivitätnativer MAO-Enzyme (z. [53] Auch wenn dies im Prinzip seit Jahren bekannt ist, [54] findet die ¾nderung der ADME-Eigenschaften durch selektiven Deuteriumeinbau erst seit kurzem vermehrte Aufmerksamkeit, [55] insbesondere da eine Reihe neuer Firmen deuterierte Versionen etablierter therapeutischer Moleküle patentiert und daraus ein Geschäftsmodell entwickelt haben. [52] Abhängig von den beteiligten Enzymen, und damit vom Mechanismus des geschwindigkeitsbestimmenden Schrittes, kann eine weitere Konsequenz sein, dass nach Austausch von Wasserstoff gegen Deuterium ein anderer metabolischer Ablauf stattfindet.…”
Section: Isotopeneffekte Zur Bestimmung Von Enzymmechanismenunclassified
“…[52] Abhängig von den beteiligten Enzymen, und damit vom Mechanismus des geschwindigkeitsbestimmenden Schrittes, kann eine weitere Konsequenz sein, dass nach Austausch von Wasserstoff gegen Deuterium ein anderer metabolischer Ablauf stattfindet. [53] Auch wenn dies im Prinzip seit Jahren bekannt ist, [54] findet die ¾nderung der ADME-Eigenschaften durch selektiven Deuteriumeinbau erst seit kurzem vermehrte Aufmerksamkeit, [55] insbesondere da eine Reihe neuer Firmen deuterierte Versionen etablierter therapeutischer Moleküle patentiert und daraus ein Geschäftsmodell entwickelt haben. [56] Die Frage,obein deuteriertes Analogon einer bekannten Verbindung nach Stand der Te chnik evident ist, war Gegenstand anhaltender Debatte, [57] wobei der aktuelle Trend zur vermehrten Ablehnung neuer Patentanmeldungen fürd euterierte Wirkstoffanaloga geht.…”
Section: Anwendung Von Isotopen Zur Verbesserung Etablierterunclassified