Brønsted Acid-Catalyzed Decarboxylative Redox Amination: Formation of <i>N</i>-Alkylindoles from Azomethine Ylides by Isomerization
作者:Hui Mao、Sichang Wang、Peng Yu、Huiqing Lv、Runsheng Xu、Yuanjiang Pan
DOI:10.1021/jo102218v
日期:2011.2.18
decarboxylative redox amination involving aldehydes with 2-carboxyindoline for the synthesis of N-alkylindoles is described. The decarboxylative condensations of aldehydes with 2-carboxyindoline produce azomethine ylides in situ, which then transform into N-alkylindoles by isomerization.
Tunable Hydride Transfer in the Redox Amination of Indoline with Aldehyde: An Attractive Intramolecular Hydrogen-Bond Effect
作者:Hui Mao、Runsheng Xu、Jieping Wan、Zhengyang Jiang、Cuirong Sun、Yuanjiang Pan
DOI:10.1002/chem.201001896
日期:2010.12.3
Hydride hijacked by “hydrogen”! N‐Alkylindoles and N‐alkylindolines were obtained in the redox amination of indoline with aldehyde, which was tuned by a hydrogen‐bond effect. Salicylaldehyde gave the indoline‐type product via intermolecular hydride transfer, while other aromatic aldehydes gave the indole‐type product via intramolecular hydride transfer.
The reaction of secondary α-amino acids with carbonyl compounds. Properties of the intermediate azomethine ylides. Oxazolidine formation versus 1.4-prototropy.
作者:Moustafa F. Aly、Harriet Ardill、Ronald Grigg、Stephanie Leong-Ling、Shuleewan Rajviroongit、Sivagnanasundram Surendrakumar
DOI:10.1016/s0040-4039(00)96868-0
日期:1987.1
Cyclic secondary α-amino acids react regiospecifically, via antidipole formation, with aldehydes bearing electron withdrawing substituents to give oxazolidines in good yield. In certain cases structural features in the α-amino acid promote a 1,4-prototropic process in the intermediate azomethine ylide and divert the reaction to give 2-pyrrolines, whilst use of ninhydrin as the carbonyl component results