Nickel-Catalyzed α-Benzylation of Arylacetonitriles <i>via</i>
CO Activation
作者:Jing Xiao、Jia Yang、Tieqiao Chen、Li-Biao Han
DOI:10.1002/adsc.201500822
日期:2016.3.3
Efficient Ni‐catalyzeddirect cross‐couplings of benzylic alcohol derivatives with arylacetonitriles via CO activation are described. Various α‐benzylated arylacetonitriles including those with functional groups can be prepared undermild reaction conditions.
Nickel-catalyzed hydrogen-borrowing strategy: chemo-selective alkylation of nitriles with alcohols
作者:Sourajit Bera、Atanu Bera、Debasis Banerjee
DOI:10.1039/d0cc02261f
日期:——
The first nickel-catalyzed hydrogen-borrowing alkylation of a series of aryl acetonitriles with a variety of aryl, heteroaryl, allylic and alkyl alcohols releasing water as the by-product (>33 examples, up to 90% yield) is reported.
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。
Enantioselective cyanation of benzylic C–H bonds via copper-catalyzed radical relay
作者:Wen Zhang、Fei Wang、Scott D. McCann、Dinghai Wang、Pinhong Chen、Shannon S. Stahl、Guosheng Liu
DOI:10.1126/science.aaf7783
日期:2016.9.2
sp3-hybridized carbon–hydrogen [C(sp3)–H] bonds in complex organic molecules could facilitate much more efficient preparation of therapeutics and agrochemicals. Here, we report a copper-catalyzed radical relay pathway for enantioselective conversion of benzylic C–H bonds into benzylic nitriles. Hydrogen-atom abstraction affords an achiral benzylic radical that undergoes asymmetric C(sp3)–CN bond formation upon
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