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
Palladium-Catalyzed Carbonylation of Aryl, Alkenyl, and Allyl Halides with Phenyl Formate
作者:Tsuyoshi Ueda、Hideyuki Konishi、Kei Manabe
DOI:10.1021/ol301192s
日期:2012.6.15
palladium-catalyzed carbonylation of aryl, alkenyl, and allyl halides with phenyl formate is reported. This procedure does not use carbon monoxide and affords one-carbon-elongated carboxylic acid phenyl esters in excellent yields. The reaction proceeds smoothly under mild conditions and tolerates a wide range of functional groups including aldehyde, ether, ketone, ester, and cyano groups. Furthermore, a variety
Switchable Selectivity in the Pd-Catalyzed Alkylative Cross-Coupling of Esters
作者:Jeanne Masson-Makdissi、Jaya Kishore Vandavasi、Stephen G. Newman
DOI:10.1021/acs.orglett.8b01646
日期:2018.7.6
The Pd-catalyzed cross-coupling of phenyl esters and alkyl boranes is disclosed. Two reaction modes are rendered accessible in a selective fashion by interchange of the catalyst. With a Pd–NHC system, alkyl ketones can be prepared in good yields via a Suzuki–Miyaurareaction proceeding by activation of the C(acyl)–O bond. Use of a Pd–dcype catalyst enables alkylated arenes to be synthesized by a modified
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
Nickel-Catalyzed Decarbonylative Amination of Carboxylic Acid Esters
作者:Christian A. Malapit、Margarida Borrell、Michael W. Milbauer、Conor E. Brigham、Melanie S. Sanford
DOI:10.1021/jacs.9b13531
日期:2020.4.1
synthetic chemists. This report describes the development of a nickel-catalyzeddecarbonylative reaction that couples (hetero)aromatic esters with a broad scope of amines to form (hetero)aryl amine products. The successful realization of this transformation was predicated on strategic design of the cross-coupling partners (phenol esters and silyl amines) to preclude conventional reactivity that forms