Results 51 to 60 of about 1,660 (216)
One-Pot Conversion of Thebaine to Hydrocodone and Synthesis of Neopinone Ketal
, 2016 The ethylene glycol ketal of neopinone was prepared in a one-pot procedure by the reaction of thebaine with ethylene glyocol in the presence of p-toluenesulfonic acid.
Tomas Hudlicky (336912) +4 more
core +1 more source
Improved evaluation method for reliable distinction of poppy (Papaver somniferum L.) cultivars
International Journal of Horticultural Science, 1999 Investigating seven Hungarian standard cultivars (i.e. 'A1’, 'Kék Gemona', '13C-2`,'Kék Duna', `Kompolti M’, `Gödi N', 'Kozmosz) it was proved that for the reliable distinction between cultivars a complex analysis is necessitated. Because of the large
J. Bernáth, J. Bakó, F. Petheő
doaj +1 more source
Acetylation‐Deacetylation‐Driven Natural Product Biosynthesis
ChemistryEurope, Volume 3, Issue 4, July 14, 2025.This review summarizes the role of acetylation‐deacetylation in natural product biosynthesis, including acetylation followed by deacetylation after several biosynthetic steps, acetylation‐mediated rearrangement, acetylation‐triggered elimination, and the acetylation cycle as a regulatory mechanism. These processes are vital for the formation of complex
Huibin Wang, Ikuro Abe
wiley +1 more source
The reactions of thebaine with C-nitroso-compounds
, 1972 The reactions of thebaine with nitrosoarenes to form Diels–Alder adducts have been investigated. Reversibility of the addition of a series of parasubstituted nitrosoarenes to thebaine has been qualitatively studied by NMR spectrometry.
Peter Horsewood (7166018)
core +1 more source
Synthesis of Morphinan Alkaloids in Saccharomyces cerevisiae. [PDF]
PLoS ONE, 2015 Morphinan alkaloids are the most powerful narcotic analgesics currently used to treat moderate to severe and chronic pain. The feasibility of morphinan synthesis in recombinant Saccharomyces cerevisiae starting from the precursor (R,S)-norlaudanosoline ...
Elena Fossati +4 more
doaj +1 more source
New Phytologist, Volume 247, Issue 1, Page 233-248, July 2025.Summary Pathogenesis‐related (PR) proteins are diverse stress‐ or pathogen‐induced proteins. Some are associated with specialised metabolism, including proposed functions for anthocyanin biosynthesis. However, data are limited to a few angiosperm species, and the mode(s) of action are uncertain.
Yanfei Zhou +8 more
wiley +1 more source
The determination of thebaine in Papaver bracteatum Lindl by gas-liquid chromatography
, 1975 Several solvents have been examined in the process of developing a convenient method for extracting powdered material and removing interfering pigments to produce an extract of Papaver bracteatum suitable for g.l.c. assay.
K Helliwell, J W Fairbairn
core +1 more source
Journal of Medicinal Plants, 2019 Background: Iranin poppy (Papaver bracteatum Lindl.) belongs to Papaveraceae family which has important alkaloids such as thebain. Objective: Investigation of genetic diversity and population structure of Iranian poppy populations from Alborz Mountains ...
javad shaghaghi +2 more
doaj
La région thébaine dans les relations des voyageurs anciens de 1600 à 1799 (Description de l'Egypte)
Dialogues d'Histoire Ancienne, 1992 Cet article fait le point sur les premières explorations de la région thébaine entre 1600 et 1799 (l'expédition de Bonaparte), et ce à travers les relations des voyageurs de l'époque. Avant cette date, Thèbes semble n'avoir été visité que par un voyageur
Abdellah Filal
doaj +1 more source
Characterization of Opioid Agonist Morphine Derivatives with Emphasis on Medicinal Chemistry
ChemMedChem, Volume 20, Issue 4, February 16, 2025.The aim of synthesizing new opioid compounds is to produce drugs that are more potent, less addictive, and have fewer side effects, such as respiratory depression and constipation. To achieve this, we evaluated the basicity, lipophilicity, and permeability of 30 opioid compounds, including 11 newly synthesized ones, to better understand the ...
Alaa Malik +7 more
wiley +1 more source