Organotin-catalyzed synthesis of hydroxyalkylamides from lactones via a ring-opening process
作者:Xiayu Liang、Peng Yu、Chen Fu、Yongcun Shen
DOI:10.1016/j.tetlet.2021.152821
日期:2021.3
A new strategy for the facile synthesis of hydroxyalkylamides through the ring-opening reaction of lactone with amine promoted by dibutyltin acetate was developed. A series of hydroxyalkylamide compounds were obtained and the method was successfully applied to the synthesis of pharmaceutically active molecules tyrosinase inhibitor V and HDAC inhibitor VI via a three-step synthetic pathway. The broad
The preparation of hydroxy amides from a wide variety of lactones and amines has been achieved at 9 kbar and 30 or 65 °C. The yields of hydroxy amides were moderate to excellent. Some limitations were encountered in the reaction of 6-hexanolide; for example, diethylamine gave only a 15% yield of the corresponding amide at 8 kbar and 60 °C. 4-Pentanolide did react with extremely unreactive amines such
已在 9 kbar 和 30 或 65 °C 下实现了由多种内酯和胺制备羟基酰胺。羟基酰胺的产率中等至极好。6-己内酯的反应遇到了一些限制;例如,二乙胺在 8 kbar 和 60 °C 下仅产生 15% 的相应酰胺收率。4-戊内酯确实与极不活泼的胺如4-硝基苯胺和二苯胺反应,产物是羟基酰胺和3-氨基丁酸的混合物。
High-pressure Ammonolysis of Lactones to Hydroxyamides
The preparation of hydroxyamides from a variety of lactones and amines has been achieved at 9 kbar and 30 °C or 65 °C. The yields of hydroxyamides were excellent to moderate.
已在 9 kbar 和 30 °C 或 65 °C 下实现了由各种内酯和胺制备羟基酰胺。羟基酰胺的产率极好至中等。
Rhodium(I)- and iridium(I)-catalyzed hydroboration reactions: scope and synthetic applications
作者:David A. Evans、Gregory C. Fu、Amir H. Hoveyda
DOI:10.1021/ja00043a009
日期:1992.8
A study of the rhodium(1)- and iridium(1)-catalyzed hydroboration of olefins with catecholborane is described. Applications to organic synthesis were one focus of this investigation. The scope of the reaction was defined, and issues of stereoselection were addressed. The rhodium-catalyzedhydroboration of several classes of allylic alcohols was found to be highly diastereoselective, preferentially