A convenient one-pot protocol for the synthesis of N,N′-disubstituted and N,N,N′-trisubstituted amidines is reported. In the presence of the Ph3P–I2/Et3N system, a variety of secondary amides were smoothly reacted with primary or secondary amines to afford the corresponding amidines in good to excellent yields under mild conditions.
报道了一种方便的一锅法合成N,N'-二取代的N,N,N,N'-三取代的am。在Ph 3 P–I 2 / Et 3 N体系存在下,多种仲酰胺与伯胺或仲胺平稳反应,在温和条件下以良好或极佳的收率得到相应的am。