Aporphines. 27. Mechanistic aspects of the rearrangement of thebaine and codeine analogs in methanesulfonic acid. Improved method for the synthesis of N-alkylated aporphines
The methanesulfonic acid-catalyzedrearrangement of thebaine (1) in the presence of thiophenol resulted in 2-phenylthioapocodeine (7), whose O-demethylation gave 2-phenylthioapomorphine (8). An analogous transformation of1 with thiosalicylic acid furnished the ethers (6) and (11) together with a polycyclic ketone (12) and a polycyclic acetal (15). Upon treatment of the acetal (15) with acid the thioxanthylium
Regioselective O-Demethylation of Aporphines with Methanesulfonic Acid / Methionine: An Efficient One-Pot Transformation of Thebaine to (R)(-)-2-Methoxyapomorphine
作者:S. Berényi、C. Csutorás、S. Gyulai、S. Makleit
DOI:10.1080/00397919508011359
日期:1995.2
Abstract 2-Methoxyapomorphine (4) was obtained by the rearrangement of thebaine (1) with methanesulfonic acid in the presence of methionine, a reagent system suitable for the regioselectiveO-demethylation of aporphine derivatives.
Synthesis of Pharmacologically Active Apomorphines by Direct N-Substitution on the Aporphine Backbone
作者:Attila Sipos、Sándor Berényi
DOI:10.1055/s-2008-1078494
日期:——
A method has been developed for the direct N-substitution of aporphines comprising the N-oxidation-N-deprotection-N-alkylation sequence. This methodology was found to be insensitive to the change in the substitution pattern of rings A or D, therefore it is presumed to be applicable also for aporphines derived from total synthesis and natural sources.
已经开发了一种用于直接 N-取代阿朴啡的方法,包括 N-氧化-N-脱保护-N-烷基化序列。发现该方法对环 A 或 D 的取代模式的变化不敏感,因此推测它也适用于全合成和天然来源的阿朴啡。
Synthesis of New Apomorphine Derivatives Containing Halogen (CI and Br) in RING-D#
作者:Sándor Hosztafi、Sándor Makleit
DOI:10.1080/00397919608003811
日期:1996.11
Abstract A series of 8-halogen- (Cl,Br)-substituted apocodeines was prepared by the rearrangement of the corresponding 1-halogen-substituted codeines. O-demethylation of the apocodeines yielded the 8-halogenoapomorphines. 8-bromo-substituted morphothebaine derivatives have been conveniently prepared by direct bromination.
Salutaridine and its derivatives as thebaine-equivalents in the synthesis of aporphines
作者:Antal Udvardy、Attila Sipos
DOI:10.2478/s11532-013-0330-4
日期:2013.12.1
pentacyclic morphinan-6,8-diene-type thebaine. In the presence of nucleophiles, this procedure could lead to pharmacologically interesting new tetrasubstituted aporphinoids. The enantioselective synthesis of 7S-salutaridinol (2) has been also achieved in order to investigate the acid-catalyzed reactions of this natural morphinan.