mild amine basic conditions is described. A cooperative catalysis of CpRu complex, DBU, and NaPF6 enables chemoselective and catalytic generation of nucleophiles from barely acidic acetonitrile, which is integrated into the addition to aldehydes, imines, and activated ketones. Mechanistic investigations revealed that the three catalyst components work together to achieve high catalytic efficiency.
combination of the catalytic triad enabled catalyticactivation of acetonitrile as a nucleophile under mild amine-basic conditions. Addition of in situ-generated, Ru-bound, metalated nitrile to aldehydes and imines proceeded smoothly with 2.5-5 mol % Ru complex and 2.5-10 mol % DBU in the presence of 10 mol % NaPF6. Preliminary mechanistic studies suggested a role for each of the three catalytic components
A Robust Nickel Catalyst for Cyanomethylation of Aldehydes: Activation of Acetonitrile under Base-Free Conditions
作者:Sumit Chakraborty、Yogi J. Patel、Jeanette A. Krause、Hairong Guan
DOI:10.1002/anie.201302613
日期:2013.7.15
room temperature coupling of aldehydes with acetonitrile under base‐free conditions. The catalytic system is long‐lived and remarkably efficient with high turnover numbers (TONs) and turnover frequencies (TOFs) achieved. The mild reaction conditions allow a wide variety of aldehydes, including base‐sensitive ones, to catalytically react with acetonitrile.
Synthesis of<i>β</i>-Hydroxy Nitriles via Indium-Induced Coupling of Bromoacetonitrile with Carbonyl Compounds
作者:Shuki Araki、Masafumi Yamada、Yasuo Butsugan
DOI:10.1246/bcsj.67.1126
日期:1994.4
The organoindium reagent, derived from indium metal and bromoacetonitrile, reacted with carbonyl compounds in the presence of chlorotrimethylsilane to give, after hydrolysis, β-hydroxy nitriles. The coupling proceeded with high chemoselectivity, though the diastereoselectivity was low.