Direct α-Acylation of Alkenes via N-Heterocyclic Carbene, Sulfinate, and Photoredox Cooperative Triple Catalysis
作者:Kun Liu、Armido Studer
DOI:10.1021/jacs.1c01022
日期:2021.4.7
excellent functional group tolerance. Mechanistic studies reveal that these cascades proceed through a sequential radical addition/coupling/elimination process. In contrast to known triple catalysis processes that operate via two sets of interwoven catalysiscycles, in the introduced process, all three cycles are interwoven.
Cooperative NHC and Photoredox Catalysis for the Synthesis of β‐Trifluoromethylated Alkyl Aryl Ketones
作者:Qing‐Yuan Meng、Nadine Döben、Armido Studer
DOI:10.1002/anie.202008040
日期:2020.11.2
Despite the great potential of radical chemistry in organic synthesis, N‐heterocyclic carbene (NHC)‐catalyzed reactions involving radical intermediates are not well explored. This communication reports the three‐component coupling of aroyl fluorides, styrenes and the Langlois reagent (CF3SO2Na) to give various β‐trifluoromethylated alkylarylketones with good functional group tolerance in moderate to high
尽管自由基化学在有机合成中具有巨大潜力,但涉及自由基中间体的 N-杂环卡宾 (NHC) 催化反应尚未得到很好的探索。该通讯报道了芳酰氟、苯乙烯和 Langlois 试剂 (CF 3 SO 2 Na)的三组分偶联,通过光氧化还原/NHC 协同催化,以中等到高产率生成各种具有良好官能团耐受性的 β-三氟甲基化烷基芳基酮。烯烃酰基三氟甲基化通过羰基与苄基C-自由基的自由基/自由基交叉偶联进行。羰基自由基是通过原位形成的酰唑鎓离子的 SET 还原产生的,而苄基自由基则源自三氟甲基自由基加成到苯乙烯上。
O-Fluoromethyl carboxylates and O-fluoromethyl carbamates
作者:Manfred Schlosser、Dominique Limat
DOI:10.1016/0040-4020(95)00251-3
日期:1995.5
The fluoride catalyzed reaction between acyl fluorides and monomeric formaldehyde affords fluoromethyl carboxylates in acceptable yields. - Fluoromethyl fluoroformate, readily accessible from the corresponding dichloro compound, condenses with amines to give fluoromethyl carbamates.
Mechanism and Scope of Nickel-Catalyzed Decarbonylative Borylation of Carboxylic Acid Fluorides
作者:Christian A. Malapit、James R. Bour、Simon R. Laursen、Melanie S. Sanford
DOI:10.1021/jacs.9b08961
日期:2019.10.30
Article describes the development of a base-free, nickel-catalyzeddecarbonylative coupling of carboxylic acid fluorides with diboron reagents to selectively afford aryl boronate ester products. Detailed studies were conducted to assess the relative rates of direct transmetalation between aryl boronate esters and diboron reagents and a bisphosphine nickel(aryl)(fluoride) intermediate. These investigations
Decarboxylative Cross-Coupling of Acyl Fluorides with Potassium Perfluorobenzoates
作者:Liyan Fu、Qiang Chen、Yasushi Nishihara
DOI:10.1021/acs.orglett.0c02215
日期:2020.8.21
We report the transition metal-free decarboxylative cross-coupling reactions of acyl fluorides with potassium perfluorobenzoates. Compared with traditional transition metal-catalyzed cross-couplings, this protocol presents an extremely environmentally benign pathway to afford unsymmetrical diaryl ketones. To install perfluorophenyl groups, this method highlights highly selective, inexpensive, and nontoxic