A Facile Synthesis of N-Sulfonyl and N-Sulfinyl Aldimines under Barbier-Type Conditions
摘要:
A convenient synthesis of N-sulfonyl- and N-sulfinylimines by the condensation of aldehydes with sulfonyl or sulfinyl amides in the presence of benzyl bromide and zinc dust at room temperature under the Barbier-type conditions is reported. The procedure is lauded by its simplicity and adaptability to aromatic, alpha,beta-unsaturated, and aliphatic aldehydes.
Solvent-free synthesis of N-sulfonyl imines using WCl6 as a novel, highly efficient and reusable catalyst
作者:Mohammad Ali Zolfigol、Mahsa Tavasoli、Ahmad Reza Moosavi-Zare、Parastoo Arghavani-Hadi、Abdolkarim Zare、Vahid Khakyzadeh
DOI:10.1039/c3ra40681d
日期:——
WCl6 was used as a novel, efficient and reusablecatalyst for the preparation of N-sulfonyl imines via the condensation of sulfonamides with aldehydes as well as isatin under solvent-free conditions. The turn-over frequency (TOF) value of the catalyst is several times higher than the previously reported catalysts. Clean reaction, simple purification, short reaction time and high yield are some other
Cyanuric chloride is an inexpensive, efficient, and mild catalyst for the synthesis of N-sulfonyl imines by the reaction of sulfonamides with aryl aldehydes at 110 degrees C under solvent-free conditions. This method affords the N-sulfonyl imines in short reaction times, under solvent-free conditions, and in high yields.
Green, Catalyst-Free Protocol for the Efficient Synthesis of N-Sulfonyl Aldimines and Ketimines in Ionic Liquid [Bmim]Br
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.