Results 141 to 150 of about 1,919 (204)

Enantioselective de novo synthesis of 14-hydroxy-6-oxomorphinans.

Chem Commun (Camb)
Moore JC, Modell L, Glenn JR, Jones KD, Argent SP, Lane JR, Canals M, Lam HW.   +7 more
europepmc   +1 more source

Extraction, radiolabeling, and biodistribution of thebaine in rats [PDF]

Medicinal Chemistry Research, 2012
The goal of this study was to determine the radiopharmaceutical potential of radioiodinated thebaine. Thebaine was extracted from dry capsules of opium poppy (Papaver somniferum L.), purified using high-performance liquid chromatography, and characterized with nuclear magnetic resonance and infrared spectroscopy.
Fazilet Zümrüt Müftüler, F Yurt Lambrecht, P Ünak   +2 more
exaly   +6 more sources

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Dearomative Access to (−)-Thebaine and Derivatives

Organic Letters, 2023
A synthesis of the natural product thebaine is reported in eight steps from commercially available starting materials, hinging on the dearomatization and coupling of simple aromatic starting materials. This provides divergent access to two unnatural opioid derivatives and is aimed at the long-term development of synthetic opioid analogs of the ...
Zachary A. Tolchin, Dallas M. Dukes, Leanna M. Gharbaoui, Joel M. Smith   +3 more
openaire   +2 more sources

Thebaine Cyclopropanation.

ChemInform, 2003
AbstractFor Abstract see ChemInform Abstract in Full Text.
E. E. Schultz, M. M. Shakirov, I. Yu. Bagryanskaya, Yu. V. Gatilov, G. A. Tolstikov, V. N. Kalinin, H. Schmidhammer   +6 more
openaire   +1 more source

Spectrofluorimetric determination of thebaine

Mikrochimica Acta, 1975
A method has been developed for the determination of morphine hydrochloride, codeine, papaverine, narcotine and thebaine in mixtures, by measurement of the native fluorescence of the first four components, the fluorescence of the apomorphine obtained by oxidation of morphine, and the fluorescence of the hydrolysis products obtained by heating thebaine ...
R A, Chalmers, A F, Jackson
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Conversion of thebaine to codeine

Journal of Medicinal Chemistry, 1976
An improved conversion of thebaine to codeine has been developed. Oxymercuration of thebaine with mercuric acetate in refluxing methanol, followed by hydrolysis of the intermediate 7-acetomercurineopinone dimethyl ketal with 3 N acetic acid, or, alternatively, reduction of the organomercury compound with sodium borohydride and mild acid hydrolysis of ...
R B, Barber, H, Rapoport
openaire   +2 more sources

Thebain?Maleinimid-und Thebain?N-substituierte Maleinimid-Addukte

Monatshefte f�r Chemie, 1971
DasDiels-Alder-Addukt Thebain—Maleinimid wurde auf verschiedenen Wegen hergestellt. Substitution am Imidstickstoff durch Alkylhalogenide lieferte die entsprechenden N-Alkylderivate und durch Bromessigsaureathylester die entsprechende N-Carbathoxymethylverbindung. Aminolyse dieses Esters fuhrte zu einer Reihe von Amiden.
O. Hromatka, G. Sengstschmid, K. Eichinger   +2 more
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Determination of thebaine in crude thebaine samples by infrared and ultraviolet spectrophotometric methods

The Analyst, 1984
The determination of the thebaine content of crude thebaine concentrates by infrared and ultraviolet spectrophotometric methods is described. The results obtained with the two methods were found to compare favourably. The accuracy of these procedures was found to be superior to that of the K–34 (U.N.) method.
Arun Agnihotri, Satish Chandra Tewari, Pavan Khatod, Sadhana Banerjee, M. Balasubramanian   +4 more
openaire   +1 more source