Multifunctional transformation of amide C–N bond cleavage is reported. The protocol applies to benzamide, thioamide, alcohols, and mercaptan under similar reaction conditions catalyzed by NaOTs. It is noteworthy that NaOTs can not only be recycled and reused for up to three cycles without significant loss in catalytic activity, but also catalyze gram-grade reactions. This study provides a novel solution
lanthanide catalysts showed high catalytic activity and a wide scope of substrates with good to excellent yields under solvent‐freeconditions. Efficient activation of the transamidation can be realized by the above complexes acting as cooperative acid–base bifunctional catalysts, which are proposed to be responsible for the higher reactivity in comparison with simple monometallic catalysts.
A New Versatile One-Pot Synthesis of Functionalized Thioamides From Grignards, Carbon Disulfide and Amines
作者:Alan R. Katritzky、Jean-Luc Moutou、Zhijun Yang
DOI:10.1055/s-1995-4144
日期:1995.12
The one-pot successive reactions of Grignard reagents with carbon disulfide and amines mediated by 1-trifluoromethylsulfonylbenzotriazole or triflic anhydride, provide and attractive and general route to thioamides. A wide variety of amines (primary alkyl, arylalkyl, secondary alkyl, cyclic amines, aniline, N-substituted anilines, heterocyclic amidines, amino alcohols, amino ethers, amino acetals, amino ketones, amino esters, amino amides (peptides), aminoalkenes, and diamines) and Grignard (primary alkyl, arylalkyl, aryl, secondary alkyl and tertiary alkyl) can be used, and thioamides are generally formed in good to moderate yields.
Caro's Acid Supported on Silica Gel. Part 2<sup>1</sup>: Conversion of Thioamides into Amides
作者:B. Movassagh、M. M. Lakouraj、K. Ghodratl
DOI:10.1080/00397910008086876
日期:2000.7
Abstract A series of thioamide compounds have been converted into their corresponding amides under mild condition by treatment with Caro'sacid supported on silica gel.
Primary thioamides have been utilised directly in water, without any derivatisation, to selectively thioacylate primary amines. By employing 2-hydroxyethylamines, the reaction can be extended to the preparation of 2-thiazolines via formation of β-hydroxythioamides.