A novel product‐derived bimetallic palladium complexcatalyzes a sulfonylazide‐transfer reaction with the σ‐donor/π‐acceptor ligand CO, and is advantageous given its broad substrate scope, high efficiency, and mild reaction conditions (atmospheric pressure of CO at room temperature). This methodology provides a new approach to sulfonylureas, which are present in both pharmaceuticals and agrochemicals
An Improved Method for the Synthesis of Sulfonylureas
作者:J. Cervelló、T. Sastre
DOI:10.1055/s-1990-26837
日期:——
Treatment of isocyanates with sulfonamides in dimethylformamide in the presence of copper(I) chloride affords sulfonylureas in high yields under mild conditions.
The invention relates to the use of piperazine compounds of formula (I) or the agriculturally useful salts of piperazine compounds of formula (I) as herbicides, the variables in formula (I) being defined as cited in the claims and the description.
An efficient, mild, and novel route is developed to synthesize sulfonylurea via the nickel-catalyzed tandem coupling of sulfonyl azide, isocyanide, and water in aqueous media. The sulfonyl azide is expected to act as a nitrene precursor, which upon reaction with isocyanide generates carbodiimide. Herein, water acts as a nucleophile and reacts with carbodiimide to deliver the product. The protocol uses