Results 101 to 110 of about 1,660 (216)

Determination of the kinetic characteristics of the heterogeneous reaction of dissociation of thebaine molecules on the surface of oxidized molybdenum

, 2023
Dissociative surface ionization of С19Н21О3N thebaine molecules with m/z 311 has been studied under unified conditions of nonstationary processes of surface ionization on the surface of oxidized molybdenum using unsteady methods of voltage modulation and
Z.R. Norboyeva, G. T. Rakhmanov, B. E. Umirzakov   +2 more
core  

Some biphenyls derived from thebaine

, 1967
(+)-3,4-Dimethoxy-2-(5-methoxy-2-vinylphenyl)-stilbene has been prepared from thebaine. This is a biphenyl with a "buttressed" ortho-me thoxyl group, as well as being substituted in the 6,6-positions by vinyl groups.
Manser, W. W. T.
core  

Enantioselective Synthesis of (−)-Dihydrocodeine and Formal Synthesis of (−)-Thebaine, (−)-Codeine, and (−)-Morphine from a Deprotonated α‑Aminonitrile

, 2016
The α-benzylation of a deprotonated bicyclic α-aminonitrile, followed by Noyori’s asymmetric transfer hydrogenation combined with the Grewe cyclization onto a symmetrical A-ring precursor, are the key steps of a short and high-yielding enantioselective ...
Mario Geffe (1734589), Till Opatz (1395832)   +1 more
core   +1 more source

Thebaine [PDF]

, 2020
openaire   +1 more source

Selective Opening of Ring C in the Morphine Skeleton by an Unexpected Cleavage of the C5−C6 Bond in Cycloadducts of Thebaine and Acyl Nitroso Compounds

, 2016
Acyl nitroso cycloadducts of the alkaloid thebaine undergo an unexpected cleavage of the C5−C6 bond when treated with 2 equiv of samarium(II) iodide in THF to give novel hexahydrobenzazocine products.
Gary N. Sheldrake (2654287), Nicolas Soissons (2654290)   +1 more
core   +1 more source

Connection of frost tolerance and alkaloid accumulation potential in poppy (Papaver somniferum L.)

Journal of Applied Botany and Food Quality, 2012
In the Central-European region, a growing interest for winter poppy varieties both for industrial and culinary purposes can be observed. In connection with breeding, we studied if winter hardiness and alkaloid accumulation capacity are linked in some way.
C. Jászberényi, É. Németh
doaj  

Spectrophotometric and FT-IR studies of interaction of narcotic drugs (morphine, codeine and thebaine) with acceptors (HQ, BQ, NQ, PA, o-Chlo, DNB), their thermodynamics and determination of the vertical ionization potentials of the drugs

, 2010
Central Forensic Science Laboratory, 30, Gorachand Road, Kolkata-700 014, India E-mail : kuiladk@rediffmail.com, sujitclahiri@yahoo.com Manuscript received 12 August 2009, accepted 15 September 2009 Morphine, codeine and thebaine formed charge ...
S. C. Lahiri, Dilip Kumar Kuila
core   +1 more source

Thomas Cook en Égypte et à Louxor : l’invention du tourisme moderne au XIXe siècle

Téoros, 2006
En 1869, l’ouverture du canal de Suez est célébrée en présence des représentants des puissances coloniales et de l’aristocratie européennes. À cette occasion, Thomas Cook fait affréter deux bateaux de croisière selon la formule combinée du voyage en ...
Sandrine Gamblin
doaj  

Stereoselectivity in quaternization of thebaine. 270 MHz PMR spectroscopic studies

, 1987
The quaternization of thebaine (I) with Pr iodide and iso-Pr iodide was studied by PMR spectroscopy. The results indicate that the major diastereomer is formed to the extent of approximate 75% of the diastereomeric mixture by axial attack of the alkyl ...
Madhyastha, Madhava K, Manoharan, Samuel T   +1 more
core  

Opium alkaloids, biosynthesis, pharmacology and association with cancer occurrence. [PDF]

Open Biol, 2023
Vadhel A, Bashir S, Mir AH, Girdhar M, Kumar D, Kumar A, Mohan A, Malik T, Mohan A.   +8 more
europepmc   +1 more source