Effect of pressure on the Strecker synthesis of hindered α-aminonitriles from ketones and aromatic amines
作者:Gérard Jenner、Ridha Ben Salem、Jong Chul Kim、Kiyoshi Matsumoto
DOI:10.1016/s0040-4039(02)02598-4
日期:2003.1
effect of highpressure is examined in Strecker reactions involving ketones, amines and trimethylsilyl cyanide. This effect is small when moderately hindered reactants are involved. However, in the case of aniline and N-methylaniline, the sensitivity of the reaction to pressure increases with increasing steric bulk of the alkyl groups of the ketone. The results confirm the merit of pressure activation
Synthesis of 4-hydroxy-2(1H)-pyridones from azomethines and substituted dialkylmalonates
作者:S. Kafka、T. Kappe
DOI:10.1007/bf00806968
日期:1997.10
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.