A Synthetic Strategy for Novel Organothiophosphates Incorporating a Pyridine Ring

Abstract

Eight novel amidothiophosphates have been successfully achieved using cycloiminium salts of pyridine as the starting material. Phosphorylation was done using phosphorus trichloride, and the resulting functionalized iminohalophosphines in situ were further oxidized and substituted through sulfur and a suitable secondary amine (alkyl, alicyclic, and aryl). The reactions were carried out in a dry nitrogen atmosphere. The synthesized products were characterized using different spectroscopic techniques (¹H and ³¹P NMR). The pyridine nucleus incorporating a phosphoryl group is highly bioactive. Hence, the synthesized organothiophosphates should be potential pesticidal molecules.

Keywords:

• Amidothiophosphate
• cycloiminium salts
• iminohalophosphines

Acknowledgments

We are grateful to the head, of the Department of Chemistry, University of Rajasthan, Jaipur, for providing necessary facilities. We are also highly indebted to the Department of Chemistry, Punjab University, Chandigarh, for carrying out NMR spectra.