Efficienttransamidation of unactivated carboxamides, phthalimides, formamides and thioamides with amines undersolvent-freeconditions using H-β-zeolite as a green and recyclable heterogeneous catalyst is described. Easy work up, high purity of the products, recyclability and environmentally-friendly nature of the catalyst are the attractive features of the present methodology. This is the first report
Silver-Catalyzed Hydroboration of C–X (X = C, O, N) Multiple Bonds
作者:Vipin K. Pandey、Chandra Shekhar Tiwari、Arnab Rit
DOI:10.1021/acs.orglett.1c00106
日期:2021.3.5
AgSbF6 was developed as an effective catalyst for the hydroboration of various unsaturated functionalities (nitriles, alkenes, and aldehydes). This atom-economic chemoselective protocol works effectively under low catalyst loading, base- and solvent-free moderate conditions. Importantly, this process shows excellent functional group tolerance and compatibility with structurally and electronically diverse
A metal-free approach for the synthesis of amides/esters with pyridinium salts of phenacyl bromides via oxidative C–C bond cleavage
作者:Kesari Lakshmi Manasa、Yellaiah Tangella、Namballa Hari Krishna、Mallika Alvala
DOI:10.3762/bjoc.15.182
日期:——
O-benzoylation of various amines/benzyl alcohols with pyridinium salts of phenacyl bromides is demonstrated to generate the corresponding amides and esters. This protocol facilitates the oxidative cleavage of a C–C bond followed by formation of a new C–N/C–O bond in the presence of K2CO3. Various pyridinium salts of phenacyl bromides can be readily transformed into a variety of amides and esters which is an
用苯甲酰溴的吡啶鎓盐对各种胺/苄醇进行N-和O-苯甲酰化的有效,简单和无金属的合成方法被证明可以生成相应的酰胺和酯。该方案有助于在存在K 2 CO 3的情况下促进C–C键的氧化裂解,然后形成新的C–N / C–O键。苯甲酰溴的各种吡啶鎓盐可以很容易地转化为各种酰胺和酯,这是有机合成中常规酰胺化和酯化的另一种方法。高官能团耐受性,广泛的底物范围和操作简便性是当前方案的突出优点。
The direct synthesis of N-alkylated amides via a tandem hydration/N-alkylation reaction from nitriles, aldoximes and alcohols
作者:Nana Wang、Xiaoyuan Zou、Juan Ma、Feng Li
DOI:10.1039/c4cc02742f
日期:——
A novel strategy for the direct synthesis of N-alkylatedamidesfrom nitriles, aldoximes and alcohols was proposed and accomplished in the presence of a Cp*Ir complex.