Iron-Doped Single-Walled Carbon Nanotubes as New Heterogeneous and Highly Efficient Catalyst for Acylation of Alcohols, Phenols, Carboxylic Acids and Amines under Solvent-Free Conditions
single-walled carbon nanotubes (Fe/SWCNTs) represent an efficient and new heterogeneous reusable catalyst for the acylation of a variety of alcohols, phenols, carboxylic acids and amines with acid chlorides or acid anhydrides undersolvent-freeconditions. The reactions of various primary, secondary, tertiary, and benzylic alcohols, diols, phenols, as well as aromatic and aliphatic amines give acylated
undivided cell, of Ph3P in the presence of a carboxylic acid in CH2Cl2 containing 2,6-lutidinium perchlorate as the supporting electrolyte was shown to generate the corresponding acyloxyphosphonium ion, Ph3P+-OCOR, which was converted in situ to esters, amides, and β-lactams under mild conditions.
结果表明,在羧酸存在下的CH 2 Cl 2中,含高氯酸2,6-lut啶鎓作为辅助电解质的PH 3 P在不分隔的电池中恒流电解会生成相应的酰氧基phosph离子Ph 3 P + -OCOR,在温和条件下原位转化为酯,酰胺和β-内酰胺。
A convenient procedure for the esterification of benzoic acids with phenols: a new application for the Mitsunobu reaction
作者:Victor P. Fitzjarrald、Rongson Pongdee
DOI:10.1016/j.tetlet.2007.03.095
日期:2007.5
The Mitsunobureaction was found to be a convenient and effective method for the esterification of various benzoic acids with differentially functionalized phenols producing the corresponding phenyl esters in good to excellent yields.
Evidence of Substituent-Induced Electronic Interplay. Effect of the Remote Aromatic Ring Substituent of Phenyl Benzoates on the Sensitivity of the Carbonyl Unit to Electronic Effects of Phenyl or Benzoyl Ring Substituents
作者:Helmi Neuvonen、Kari Neuvonen、Paavo Pasanen
DOI:10.1021/jo035521u
日期:2004.5.1
Carbonylcarbon 13C NMR chemicalshifts δC(CO) measured in this work for a wide set of substituted phenyl benzoates p-Y-C6H4CO2C6H4-p-X (X = NO2, CN, Cl, Br, H, Me, or MeO; Y = NO2, Cl, H, Me, MeO, or NMe2 ) have been used as a tool to study substituent effects on the carbonyl unit. The goal of the work was to study the cross-interaction between X and Y in that respect. Both the phenyl substituents
羰基碳13个C NMR化学位移δ Ç(C O)在这项工作中测量了一系列广泛取代的苯基甲酸酯的p -YC 6 ħ 4 CO 2 C ^ 6 ħ 4 - p -X(X = NO 2,CN,氯,Br,H,Me或MeO; Y = NO 2,Cl,H,Me,MeO或NMe 2)已用作研究取代基对羰基单元影响的工具。这项工作的目的是研究X和Y在这方面的交互作用。两个苯基取代基X和取代基苯甲酰Y具有上δ反向效应Ç(CO)。吸电子的取代基引起屏蔽,而给电子的取代基具有相反的影响,电感和共振效应都很大。X和Y之间交叉相互作用的存在可以清楚地证实。远程芳族环取代基的电子效应系统地改变了C O基团对苯基或苯甲酰基环取代基的电子效应的敏感性。吸电子在一个环取代基降低δ的灵敏度Ç(CO)取代另一个环,而供电子取代基反过来影响灵敏度。建议的结果可以用不同共振结构的贡献的取代基敏感平衡来解释(电子离域,方案1)。
Cyclometalated Half-Sandwich Ruthenium Complexes: Preparation, Structure, and Catalytic Synthesis of Phenolic Esters from Aryl Halides without Using External CO under Air
作者:Lin Yang、Ai-Lin Guan、Zheng-Yang Xu、Zi-Jian Yao
DOI:10.1021/acs.inorgchem.3c02663
日期:2023.11.6
cyclometalated C,N-chelate half-sandwich ruthenium complexes based on N-heterocyclic ligands were prepared through a simple route with good yields. These air- and moisture-stable cyclometalated ruthenium complexes showed excellent catalytic efficiency in phenoxy carbonylation of arylhalides with phenyl formate derivatives as a CO source and phenol as a coupling partner under air. Ester products were