Fluoride anion-initiated bis-trifluoromethylation of phenyl aromatic carboxylates with (trifluoromethyl)trimethylsilane
作者:Kenjiro Takahashi、Yusuke Ano、Naoto Chatani
DOI:10.1039/d0cc04826g
日期:——
carboxylates with (trifluoromethyl)trimethylsilane (Me3SiCF3) that results in the formation of O-silyl-protected 2-aryl-1,1,1,3,3,3-hexafluoroisopropanols is reported. A phenoxide anion, generated during the trifluoromethylation of the phenyl carboxylate, also activates the Me3SiCF3, which permits a catalytic amount of the fluoride anion source to be used. Various functional groups, which can be used for further
Catalytic Deoxygenative Coupling of Aromatic Esters with Organophosphorus Compounds
作者:Miki B. Kurosawa、Ryota Isshiki、Kei Muto、Junichiro Yamaguchi
DOI:10.1021/jacs.0c02839
日期:2020.4.22
We have developed a deoxygenative coupling of aromatic esters with diarylphosphine oxides/dialkyl phosphonates under palladium ca-talysis. In this reaction, aromatic esters can work as novel benzylation reagents to give the corresponding benzylic phosphorus compounds. The key of this reaction is the use of phenyl esters, an electron-rich diphosphine as a ligand, and sodium formate as a hydrogen source
我们开发了在钯催化下芳族酯与二芳基膦氧化物/二烷基膦酸酯的脱氧偶联。在该反应中,芳族酯可作为新型苄基化试剂生成相应的苄基磷化合物。该反应的关键是使用苯酯、富电子二膦作为配体,以及甲酸钠作为氢源。芳基羧酸也适用于该反应,使用 (Boc)2O 作为添加剂。钯/dcype 用于激活酯的酰基 CO 键并支持甲酸钠的还原。
Ligand‐Controlled C−O Bond Coupling of Carboxylic Acids and Aryl Iodides: Experimental and Computational Insights
Palladium‐catalyzedcross‐coupling reactions between carboxylic acids and arylhalides have several possible competitive pathways. Decarboxylative C−C bond coupling and C−H arylation are well established in the literature. However, direct C−O bond coupling between carboxylic acids and arylhalides has received little success. In this report, we describe a protocol for exclusive C−O bond formation,
Decarbonylative Synthesis of Aryl Nitriles from Aromatic Esters and Organocyanides by a Nickel Catalyst
作者:Junichiro Yamaguchi、Keiichiro Iizumi、Miki B. Kurosawa、Ryota Isshiki、Kei Muto
DOI:10.1055/s-0040-1705943
日期:2021.9
A decarbonylative cyanation of aromaticesters with aminoacetonitriles in the presence of a nickel catalyst was developed. The key to this reaction was the use of a thiophene-based diphosphine ligand, dcypt, permitting the synthesis of aryl nitrile without the generation of stoichiometric metal- or halogen-containing chemical wastes. A wide range of aromaticesters, including hetarenes and pharmaceutical
Catalytic Ester to Stannane Functional Group Interconversion via Decarbonylative Cross-Coupling of Methyl Esters
作者:Huifeng Yue、Chen Zhu、Magnus Rueping
DOI:10.1021/acs.orglett.7b03669
日期:2018.1.19
An unprecedented conversion of methyl esters to stannanes was realized, providing access to a series of arylstannanes via nickel catalysis. Various common esters including ethyl, cyclohexyl, benzyl, and phenyl esters can undergo the newly developed decarbonylative stannylation reaction. The reaction shows broad substrate scope, can differentiate between different types of esters, and if applied in