Abstract
Some bis-(2-alkylthio-furfurylidene-4H-imidazol-4-one) derivatives 4 were synthesized by S-alkylation of bis-(2-thioxo-5-furfurylidene-4- imidazolidinone) 3, which was obtained via tandem aza-Wittig reaction of vinyliminophosphorane 1, carbon disulfide, and ethylenediamine.
Acknowledgments
We gratefully acknowledge financial support of this work by the Natural Science Foundation of China (Project No. 20102001) and the Natural Science Foundation of Hubei Education Commission of China (Project No. 2003A002).
Notes
a A: Isolated yield of 3 based on vinyliminophosphorane 1. B: Purified yields of 4a–i based on bis-(2-thioxo-5-furfurylidene-4-imidazolidinone) 3.