Synthesis of 4-hydroxy-2(1H)-pyridones from azomethines and substituted dialkylmalonates
摘要:
The reaction of azomethines 4 with substituted dialkyl malonates 5 leads to the formation of 3-substituted 4-hydroxy-2(1H)-pyridones 6 in moderate yields. The azomethines 4 are prepared via arylaminopropionitriles 3 or in the conventional way by acid catalyzed condensation of ketones 1 with anilines 2. Chlorination of pyridones 6 with sulfuryl chloride leads to compounds 8-10.
Synthesis of 4-hydroxy-2(1H)-pyridones from azomethines and substituted dialkylmalonates
摘要:
The reaction of azomethines 4 with substituted dialkyl malonates 5 leads to the formation of 3-substituted 4-hydroxy-2(1H)-pyridones 6 in moderate yields. The azomethines 4 are prepared via arylaminopropionitriles 3 or in the conventional way by acid catalyzed condensation of ketones 1 with anilines 2. Chlorination of pyridones 6 with sulfuryl chloride leads to compounds 8-10.
Unsupported nanoporous gold catalyst for highly selective hydroamination of alkynes
作者:Ye Lu、Ying Wang、He Li、Peihe Li、Xiujuan Feng、Yoshinori Yamamoto、Ming Bao、Jinghai Liu
DOI:10.1039/d2ra07120g
日期:——
An efficient and highly selective heterogeneous catalyst system for hydroamination of alkynes was developed using unsupported gold nanopores (AuNPore) for the first time. The AuNPore-catalyzed highly regioselective hydroamination of alkynes proceeded smoothly without any additive and solvent under mild conditions (rt-50 °C) to yield Markovnikov imines in satisfactory to excellent yields. No gold leached