Green, Catalyst-Free Protocol for the Efficient Synthesis of N-Sulfonyl Aldimines and Ketimines in Ionic Liquid [Bmim]Br

Abstract

Sulfonamides are efficiently condensed with aldehydes as well as ketones in the absence of catalyst in 1-butyl-3-methylimidazolium bromide ([bmim]Br) under microwave irradiation to afford N-sulfonyl aldimines and ketimines in good to excellent yields in short reaction times.

Keywords:

• Catalyst-free
• ionic liquid
• microwave
• N-sulfonyl aldimine
• N-sulfonyl ketimine
• sulfonamide

ACKNOWLEDGMENTS

The authors appreciate Payame Noor University and Persian Gulf University Research Councils for the financial support of this work.

Notes

^a Isolated yield.

^a Isolated yield.

^b This reaction was carried out at 130°C.