N-Demethylation of N-methyl alkaloids with ferrocene
作者:Gaik B. Kok、Peter J. Scammells
DOI:10.1016/j.bmcl.2010.06.031
日期:2010.8
ferrocene has been found to be a convenient and efficient catalyst for the N-demethylation of a number of N-methyl alkaloids such as opiates and tropanes. By judicious choice of solvent, good yields have been obtained for dextromethorphan, codeine methyl ether, and thebaine. The current methodology is also successful for the N-demethylation of morphine, oripavine, and tropane alkaloids, producing the corresponding
作者:Justin A. Ripper、Edward R.T. Tiekink、Peter J. Scammells
DOI:10.1016/s0960-894x(00)00690-9
日期:2001.2
undergo N-demethylation processes under photochemical conditions. Tropine, acetyltropine, tropinone, and atropine were cleanly N-demethylated upon treatment with tetraphenylporphin, oxygen, and light. Dextromethorphan also underwent a N-demethylation reaction, but reacted further to afford an imine. In contrast, 14-acyloxycodeinones underwent a photochemically induced tandem N-demethylation acyl migration
Further investigation of the N-demethylation of tertiary amine alkaloids using the non-classical Polonovski reaction
作者:Shanti Thavaneswaran、Peter J. Scammells
DOI:10.1016/j.bmcl.2006.03.017
日期:2006.6
iron salt-mediated Polonovski reaction efficiently N-demethylates certain opiate alkaloids. In this process, the use of the hydrochloride salt of the tertiary N-methyl amine oxide was reported to give better yields of the desired N-demethylated product. Herein, we report further investigation into the use of N-oxide salts in the iron salt-mediated Polonovski reaction. An efficient approach for the
Studies on the oxidative N-demethylation of atropine, thebaine and oxycodone using a Fe<sup>III</sup>-TAML catalyst
作者:Duy D. Do Pham、Geoffrey F. Kelso、Yuanzhong Yang、Milton T. W. Hearn
DOI:10.1039/c3gc41972j
日期:——
affected the atropine conversion efficiency. The use of tert-butyl or cumene hydroperoxide as oxidants shifted the reaction selectivity toward N-methyl oxidation compared to aqueous H2O2. Various inorganic oxidants were found to be ineffective. The FeIII-TAML also catalysed the N-demethylation of the opiate alkaloids thebaine and oxycodone with aqueous H2O2 in higher conversion efficiencies compared
研究了Fe III -TAML催化生物碱阿托品与H 2 O 2氧化N-去甲基化的反应途径和选择性。用H 2 O 2水溶液将乙醇中的阿托品转化为主要产物去甲托品,而副产物为N-甲酰基-去甲托品和其他涉及碳-羟基化的托烷类物质的阿托品衍生物。用去甲硝苯地平,N-甲酰基-甲硝氮平和阿托品N-氧化物进行的比较反应性研究表明,Fe III-TAML通过仿生氧化途径催化阿托品的N-去甲基化,该仿生氧化途径涉及N-羟甲基去甲托品中间体的形成然后分解。发现阿托品N-去甲基化相对于N-甲基氧化成N-甲酰基-Noratropine的反应选择性对醇助溶剂的结构,H 2 O 2的添加速率和水的浓度敏感,而温度主要影响阿托品的转化效率。与含水H 2 O 2相比,使用叔丁基或枯烯氢过氧化物作为氧化剂将反应选择性向N-甲基氧化转移。发现各种无机氧化剂是无效的。与阿托品相比,Fe III -TAML还以H 2 O 2水溶
[EN] MEANS AND METHODS FOR THE N-DEALKYLATION OF AMINES<br/>[FR] MOYENS ET PROCÉDÉS DE N-DÉSALKYLATION D'AMINES
申请人:UNIV GRONINGEN
公开号:WO2017179976A1
公开(公告)日:2017-10-19
The invention relates to improved means and methods for N- dealkylation of alkylated amines. Provided is a method for the catalytic N- dealkylation of an N-alkylated amine substrate, comprising incubating said amine substrate in a suitable solvent in the presence of a nanoporous gold (NPG) surface and allowing for the formation of an N-dealkylation product. Also provided is a reaction mixture comprising an N-alkylated amine substrate in a suitable solvent and a NPG surface.