作者:W. Przychodzeń、A. Chimiak
DOI:10.1080/10426509808045487
日期:1998.12.1
Abstract Reaction of Lawesson's Reagent (LR) with two N-alkyl benzohydroxamic acids is presented. In addition to the desired thiohydroxamic acids 2, the reduction process provides amides 3 and thioamides 4. An unexpectedly pronounced solvent effect on the course of the reaction was observed. The best yields (40–50%) of 2a were obtained in THF, and in this solvent amide 3a was not formed. In HMPA solution
摘要 介绍了劳森试剂 (LR) 与两种 N-烷基苯异羟肟酸的反应。除了所需的硫代异羟肟酸 2 之外,还原过程还提供了酰胺 3 和硫代酰胺 4。观察到了对反应过程的出乎意料的显着溶剂效应。2a 的最佳产率 (40-50%) 在 THF 中获得,并且在该溶剂中没有形成酰胺 3a。在 HMPA 溶液中,酰胺 3a 和硫代酰胺 4a 是唯一的产物,根本没有形成 2a。