Arylation of Aldehydes To Directly Form Ketones via Tandem Nickel Catalysis
作者:Chuanhu Lei、Daoyong Zhu、Vicente III Tiu Tangcueco、Jianrong Steve Zhou
DOI:10.1021/acs.orglett.9b01782
日期:2019.8.2
both aliphatic and aromatic aldehydes proceeds with air-stable (hetero)arylboronic acids, with an exceptionally wide substrate scope. The neutral condition tolerates acidic hydrogen and sensitive polar groups and also preserves α-stereocenters of some chiral aldehydes. Interestingly, this nickel(0) catalysis does not follow common 1,2-insertion of arylmetal species to aldehydes and β-hydrogen elimination
Selective catalytic synthesis of α-alkylated ketones and β-alkylated secondary alcohols <i>via</i> hydrogen-borrowing
作者:Md. Bakibillah、Sahin Reja、Kaushik Sarkar、Deboshmita Mukherjee、Rajesh Kumar Das
DOI:10.1039/d3nj02295a
日期:——
were shown to be efficient catalysts for α-alkylation of ketones and β-alkylation of secondary alcohols with primary alcohols in the presence of a catalytic amount of the Cp*Ir(III) catalyst and tBuOK in toluene at 110 °C via hydrogen-borrowing and produced substituted ketone products in good to excellent yields. This new C–C bond-formingreaction needs very small amounts of catalyst and base and produces
制备了由吡啶甲酰胺基部分支持的一组三种Ir-( III )配合物。这些络合物被证明是酮的 α-烷基化和仲醇与伯醇的 β-烷基化的有效催化剂,在催化量的 Cp*Ir( III ) 催化剂和t BuOK 的存在下,在甲苯中于 110 °C下通过借氢并以良好至优异的产率生产取代酮产品。这种新的 C-C 键形成反应需要非常少量的催化剂和碱,并且仅产生 H 2 O 作为副产物,使其成为一种有吸引力且环保的方案,可实现酮衍生物的“绿色”合成。
Dirhodium(<scp>ii</scp>)/P(<i>t</i>-Bu)<sub>3</sub> catalyzed tandem reaction of α,β-unsaturated aldehydes with arylboronic acids
作者:Ziling Ma、Yuanhua Wang
DOI:10.1039/c8ob01997e
日期:——
catalyst for the synthesis of aryl alkyl ketones by the tandem reaction of α,β-unsaturated aromatic or aliphatic aldehydes with arylboronic acids. This tandem procedure included arylation followed by the isomerization reaction. This method exhibits good functional group tolerance and has a broad substrate scope. With the conjugated aldehydes, the one-step synthesis of γ,δ-unsaturated ketones was realized