Abstract
The carbodiimides 2, obtained from aza–Wittig reactions of iminophosphorane 1 with aromatic isocyanates, reacted with aliphatic primary amines to give mainly 2-alkylamino-4(3H)-quinazolinones 4 with unusual selectivity.
Acknowledgment
We gratefully acknowledge financial support of this work by the National Natural Science Foundation of China (Project No. 20102001).