Aminoacidderivatives undergo non-Kolbe electrolysis to afford enantiomerically enriched α-alkoxyamino derivatives through intermediate chiral carbenium ions. The products contain N,O-acetals which are important structural motifs found in bioactive natural products. The reaction is performed in a continuous flow electrochemical reactor coupled to a 2D-HPLC for immediate online analysis. This allowed
Electrochemical Deallylation of α-Allyl Cyclic Amines and Synthesis of Optically Active Quaternary Cyclic Amino Acids
作者:Peter G. Kirira、Masami Kuriyama、Osamu Onomura
DOI:10.1002/chem.200903512
日期:2010.4.6
Electrochemical oxidation of α‐allylated and α‐benzylated N‐acylated cyclic amines by using a graphite anode easily affords the corresponding α‐methoxylated products with up to 76 % yield. Ease of oxidation was affected by the type of electrode, the size of cyclic amine, and the nature of the protecting group. This method was successfully applied to the synthesis of optically active N‐acylated α‐alkyl‐α‐amino
A general method for the synthesis of indoles bearing a variety of substituents at the β-position, and its application to the synthesis of l-tryptophan
A general synthetic method of β-substituted indoles such as indoleacetic acid, tryptamine and L-tryptophan has been exploited utilizing α-methoxylated amides, lactams, a carbamate, and sulfonamides, easily obtainable by an electrochemical method, as key intermediates.
Trimethylsilyl Azide Promoted Shono Oxidation of N,N-Dialkyl Amides
作者:Shengmei Guo、Hu Cai、Wenlin Luo、Ruixing Zhang、Qi Xu、Shengyu Zheng、Junpeng Yang、Meixia Liu
DOI:10.1055/a-2159-4847
日期:2023.12
An alkoxylation of N,N-dialkyl amides by the Shono reaction has been developed that offers a simple and efficient way to access N-adjacent-carbon-substituted amides. TMSN3 plays an essential role in this transformation and permits the reaction to proceed with a broad substrate scope under mild conditions. This reaction proceeds at a lower current compared with the classical method and it affords the