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。
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
Copper(<scp>i</scp>)-catalyzed intermolecular cyanoarylation of alkenes: convenient access to α-alkylated arylacetonitriles
作者:Xin-Jie Chen、Qing-Wen Gui、Rongnan Yi、Xianyong Yu、Zhi-Lin Wu、Ying Huang、Zhong Cao、Wei-Min He
DOI:10.1039/d0ob01055c
日期:——
A novel Cu(I)-catalyzedintermolecular cyanoarylation of alkenes with diaryliodonium salts as a radical arylating reagent and tetra-butylammonium cyanide as an electrophilic cyanating reagent was established. A broad range of α-alkylated arylacetonitriles were efficiently constructed in good to excellent yields under base- and oxidant-free and mild conditions.
α-Alkylation of arylacetonitriles with primary alcohols catalyzed by backbone modified N-heterocyclic carbene iridium(<scp>i</scp>) complexes
作者:Burcu Arslan、Süleyman Gülcemal
DOI:10.1039/d0dt04082g
日期:——
backbone-modified N-heterocycliccarbene (NHC) complexes of iridium(I) (1d–f) have been synthesized and characterized. The electronic properties of the NHC ligands have been assessed by comparison of the IR carbonyl stretching frequencies of the in situ prepared [IrCl(CO)2(NHC)] complexes in CH2Cl2. These new complexes (1d–f), together with previously prepared 1a–c, were applied as catalysts for the α-alkylation