We achieved chemoselective synthesis of α-alkylated arylacetonitriles and acetamides by combining Ir complex-catalysed direct coupling of alcohols and nitriles by a simple adjustment of the base. Methanol and ethanol performed well as the alkylating reagents. This method of acetonitrile alkylation provided a novel approach for carbon chain extension.
我们通过简单的碱调节,结合 Ir 络合物催化的醇和腈的直接偶联,实现了 α-烷基化芳基乙腈和乙酰胺的化学选择性合成。甲醇和乙醇作为烷基化试剂表现良好。这种乙腈烷基化方法为碳链延长提供了一种新方法。
and representative complexes Ru (PBTNNNHN)Cl2(PPh3) (2a), Ru (PBTNNNMeN)Cl2(PPh3) (2b), and Ru (PBTNNSN)Cl2(PPh3) (2f) have been characterized by NMR spectroscopy, high‐resolution mass spectroscopy, and Fourier transform infrared (FT‐IR). The molecular structures of 1f, 2a, and 2f have been determined by X‐ray diffraction study. The results indicate that PBTNNNHN ligand in the complex presented coplanar
衍生自具有不同连接子的2-(吡啶-2-基)苯并[d]噻唑(PBT)的六齿三齿NNN配体前体PBT NN X N(X = NH,NMe,O,S)(1a – 1f)具有已经准备好了。PBT NN X N配体的电子性质可通过PBT骨架和吡啶环之间的不同连接基和/或通过在吡啶环上引入给电子/吸电子基团(R = OMe或F)很好地调节。配体前体和代表性络合物Ru(PBT NN NH N)Cl 2(PPh 3)(2a),Ru(PBT NNNMe N)Cl 2(PPh 3)( 2b)和Ru( PBT NN S N)Cl 2(PPh 3)( 2f)的特征已通过NMR光谱,高分辨率质谱和傅立叶变换红外(FT- IR)。1f, 2a和2f的分子结构已通过X射线衍射研究确定。结果表明,复合物中的PBT NN NH N配体与两个五元螯合环共面。应该注意的是2a与其他连接子(如NMe,O或S)相比,具有NH基团的分
Base‐Promoted α‐Alkylation of Arylacetonitriles with Alcohols
作者:Bivas Chandra Roy、Istikhar A. Ansari、Sk. Abdus Samim、Sabuj Kundu
DOI:10.1002/asia.201900285
日期:2019.7
A practical method to synthesize α‐alkylated arylacetonitriles from arylacetonitriles and alcohols without using any expensive transition metal complexes is demonstrated here. Following this base‐catalysed sustainable procedure, various arylacetonitriles were successfully alkylated with different alcohols. The practical applicability of this protocol was extended by one‐pot synthesis of important carboxylic
Chemoselective <i>α</i>‐Alkylation of Nitriles with Primary Alcohols by Manganese(I)‐Catalysis
作者:Krishanu Bera、Arup Mukherjee
DOI:10.1002/asia.202300157
日期:2023.7.3
Sustainable Alkylation: A simple and easy-to-use manganese(I) catalyzed sustainable alkylation of aryl nitrile with alcohols is reported. The reaction proceeds with broad substrate scope. Controlled experiments were conducted to understand the mechanism.
Amine-functionalized bifunctional Co<sup>III</sup>-NHC complexes: highly effective phosphine-free catalysts for the α-alkylation of nitriles
作者:Biswaranjan Boity、Misba Sidiqque、Arnab Rit
DOI:10.1039/d3cc05454c
日期:——
Robust bifunctional CoIII –complexes featuring amine-functionalized NHC ligands have been developed as highly effective catalysts for the nitrile α-alkylation with diverse alcohols, spanning from aliphatic to aromatic including the secondary ones.