Direct Synthesis of 2-(Cycloalkylamino)-3,4-Substituted Thiophenes via Selective Deprotonation-Cyclization of Aroyl Ketene N,S-Acetals
作者:Kethiri R. Reddy、Mandava V. Basaveswara Rao、Hiriyakkanavar Ila、Hiriyakkanavar Junjappa
DOI:10.1080/00397919608004653
日期:1996.11
Acyclic and cyclic aroyl ketene N,S-acetals undergo regioselective deprotonation-cyclization via dipole stabilized carbanion in the presence of LDA/THF to afford the corresponding 2-(cycloalkylamino)-4-aryl or 3,4-annelated thiophenes in moderate to good yields.
无环和环状芳酰基乙烯酮 N,S-缩醛在 LDA/THF 存在下通过偶极稳定的碳负离子进行区域选择性去质子化 - 环化,得到相应的 2-(环烷基氨基)-4-芳基或 3,4-退火的噻吩。产量。