在这里,我们报告了镍纳米颗粒作为酰胺还原 N-烷基化的可重复使用的催化剂。这些基于 Ni 纳米颗粒的催化剂是通过在 SiO 2上以酒石酸和 2-甲基咪唑连接的 Ni 络合物为模板合成的,然后在氩气下热解制备。应用最佳的 Ni 纳米结构催化剂,在分子氢的存在下,用不同的醛对芳香族和杂环伯酰胺进行 N-烷基化,以良好到优异的产率获得结构多样的 N-烷基化酰胺。此外,该 N-烷基化方案的适用性已被证明可用于左乙拉西坦药物中伯酰胺基团的选择性功能化。
An Efficient Catalytic Amidation of Esters Promoted by N-Heterocyclic Carbenes
作者:Ling-Yan Chen、Mei-Fang Wu
DOI:10.1055/s-0037-1610355
日期:2019.4
amidation between esters and amines or hydrazines is described. This strategy was tolerant for a wide scope of substrates, affording a series of amides (or hydrazides) in good to excellent yields (60–96%) under simple conditions. The approach was also used to synthesize the pharmaceutically relevant antidepressant moclobemide in 85% yield. An efficient NHC-catalyzed amidation between esters and amines or
[EN] 2-AMINO-PYRIDINE DERIVATIVES AS BETA-2 ADRENORECEPTOR AGONISTS<br/>[FR] DERIVES DE 2-AMINO-PYRIDINE UTILES COMME AGONISTES DE RECEPTEURS BETA-2 ADRENERGIQUES
申请人:PFIZER LTD
公开号:WO2004108675A1
公开(公告)日:2004-12-16
The invention relates to compounds of formula (1) and to processes for the preparation of, intermediates used in the preparation of, compositions containing and the uses of, such derivatives. The compounds according to the present invention are useful in numerous diseases, disorders and conditions, in particular inflammatory, allergic and respiratory diseases, disorders and conditions.
Three-component synthesis of amidomethylarenes and -heteroarenes over Hβ zeolite under solvent-free conditions
作者:Durgaiah Chevella、Naresh Mameda、Srujana Kodumuri、Rammurthy Banothu、Krishna Sai Gajula、Boris Ivanovich Kutepov、Narender Nama
DOI:10.1016/j.catcom.2017.11.002
日期:2018.2
A highly efficient and eco-friendly protocol has been described for the synthesis of amidomethylarenes and -heteroarenes via one-pot three-component coupling reaction of amides, aldehydes and (hetero)arenes over a heterogeneous catalyst (Hβ zeolite) in solvent-free conditions. The scope and limitations of this catalytic process are demonstrated with various amides and arenes and the corresponding amidoalkylated
carboxylic acid and aminederivatives catalyzed by TiCp2Cl2. Arylacetic acid derivatives reacted with different amines to afford the corresponding amides in good to excellent yield except of aniline. Aryl formic acids failed to react with aniline but smoothly reacted with aliphatic amines and benzylamine in moderate to good yield, fatty acids reacting with benzyl and aliphatic amines give amides in good
A series of cationic Ru(II)(η6-p-cymene) complexes with thioether-functionalized N-heterocyclic carbene ligands (imidazole and benzimidazole-based) have been prepared and used in the amidation reaction. The scope of the reaction has been investigated using the best catalyst.
一系列阳离子Ru(II)(η 6 - p -甲基异丙基苯)配合物与硫醚官能化的N-杂环卡宾配体(咪唑和苯并咪唑基)已被制备并用于酰胺化反应。已经使用最好的催化剂研究了反应的范围。