Dimethylaluminum methaneselenolate—a useful reagent for the preparation of selenoesters. A new friedel-crafts acylation procedure promoted by Cu(I)
作者:Alan P. Kozikowski、Anthony Ames
DOI:10.1016/s0040-4020(01)96721-3
日期:1985.1
The preparation of a new aluminum reagent, dmiethylaluminum methaneselenolate (Me2AlSeMe) is described. The reactivity of this aluminum reagent toward a variety of organic substrates has been studied. Me2AlSeMe will convert O-alkyl esters to selenoesters in high yield. These selenoesters function as extremely reactive acyl transfer agents and are converted to acids, esters, and amides on reaction with
One-Pot Amide Bond Formation from Aldehydes and Amines via a Photoorganocatalytic Activation of Aldehydes
作者:Giorgos N. Papadopoulos、Christoforos G. Kokotos
DOI:10.1021/acs.joc.6b00488
日期:2016.8.19
environmentally friendly synthesis of amides from aldehydes and amines is described. Initially, a photoorganocatalytic reaction of aldehydes with di-isopropyl azodicarboxylate leads to an intermediate carbonyl imide, which can react with a variety of amines to afford the desired amides. The initial visible light-mediated activation of a variety of monosubstituted or disubstituted aldehydes is usually fast,
A catalyst system for the formation of amides by reaction of carboxylic acids with blocked isocyanates
作者:R. Gertzmann、C. Gürtler
DOI:10.1016/j.tetlet.2005.07.156
日期:2005.9
A catalyst for the reaction of blocked isocyanates (blocking agent diisopropylamine and dimethyl pyrazole) and carboxylic acids was identified. Magnesium and in some instances calcium salts proved to be highly active as catalyst. This reaction gives amides in quantitative yield and excellent selectivity and is suitable for coating and general chemical purposes.
Heterocyclic Boron Acid Catalyzed Dehydrative Amidation of Aliphatic/Aromatic Carboxylic Acids with Amines
作者:Bin Pan、Ding-Min Huang、Hao-Tian Sun、Sheng-Nan Song、Xian-Bin Su
DOI:10.1021/acs.joc.2c02515
日期:2023.3.3
A commercially available and versatile dehydrative amidation catalyst, featuring a thianthrene boronacid structure, has been developed. The catalyst shows high catalytic activity to both aliphatic and less reactive aromatic carboxylic acid substrates, including several bioactive or clinical molecules with a carboxylic acid group.