105092-16-8Relevant academic research and scientific papers
Late-stage deoxyfluorination of alcohols with phenofluor
Sladojevich, Filippo,Arlow, Sophie I.,Tang, Pingping,Ritter, Tobias
supporting information, p. 2470 - 2473 (2013/03/28)
An operationally simple protocol for the selective deoxyfluorination of structurally complex alcohols is presented. Several fluorinated derivatives of natural products and pharmaceuticals have been prepared to showcase the potential of the method for late-stage diversification and its functional group compatibility. A series of simple guidelines for predicting the selectivity in substrates with multiple alcohols is given.
Preparation of benzoate esters of morphine and its derivatives
Beni, Szabolcs,Toth, Gergo,Noszal, Bela,Hosztafi, Sandor
, p. 1431 - 1440,10 (2020/08/20)
Sustained analgesia is crucial for patients suffering from long-acting pain. Ester derivatives of morphine could enhance the lipophilicity of morphine; consequently its transdermal delivery as well as its duration of action are also increased. Therefore, twenty-one 3-O-, 6-O-, and 14-Obenzoate esters of morphine and their derivatives were synthesized in order to elaborate different synthetic methods suitable for esterification of these widely used compounds. Schotten-Baumann reaction was applied with sodium hydrogen carbonate, triethylamine, or pyridine in methylene chloride or 1,2-dichloroethane as solvents. The presence of 4-dimethylaminopyridine catalyst was also successfully utilized mainly in the case of tertiary alcohols. A novel synthesis of dihydromorphine via diacetyl morphine free of by-products is also presented. Structures of all synthesized compounds were elucidated by 1H nuclear magnetic resonance (NMR), 13CNMR, high-resolution mass spectrometry (HRMS), and electron ionizationmass spectrometry (EI-MS). The log D (pH 7.4) values of the synthesized compounds were determined by a reversed-phase high-performance liquid chromatography (HPLC)-MS-based method, and calculated hydrolysis rate constants are also provided. The synthesized benzoate esters are potential prodrugs of the parent morphine with enhanced lipophilicity, derivatives which can also be used in transdermal drug delivery as prospective long-acting narcotic analgesics.
6-O-Glycosylation of morphine derivatives using thioglycosides as glycosyl donors
Rukhman,Yudovich,Nisnevich,Gutman
, p. 1241 - 1246 (2007/10/03)
A novel approach was developed for the synthesis of the pharmaceutically important morphine and dihydromorphine 6-β-D-glucuronides. The key step involves a selective 6-O-glycosylation of 3-O-protected morphines and dihydromorphines with thioglycosides that serve as glycosyl donors in the presence of thiophilic promoters. This novel approach may be useful for the O-glycosylation of other alkoloid derivatives.
