Photoinduced Miyaura Borylation by a Rare-Earth-Metal Photoreductant: The Hexachlorocerate(III) Anion
作者:Yusen Qiao、Qiaomu Yang、Eric J. Schelter
DOI:10.1002/anie.201804022
日期:2018.8.20
photoreductant, a Miyaura borylation, has been achieved. This simple, scalable, and novel borylation method that makes use of the hexachlorocerate(III) anion ([CeIIICl6]3−, derived from CeCl3) has a broad substrate scope and functional‐group tolerance and can be conducted at room temperature. Combined with Suzuki–Miyaura cross‐coupling, the method is applicable to the synthesis of various biaryl products, including
稀土金属光还原剂Miyaura硼酸盐化反应实现了第一个光诱导的碳(sp 2)-杂原子键形成反应。这种简单,可扩展且新颖的硼酸化方法利用六氯cerate(III)阴离子([Ce III Cl 6 ] 3−,源自CeCl 3),具有广泛的底物范围和官能团耐受性,可以在室温下进行温度。结合Suzuki-Miyaura交叉偶联,该方法适用于各种联芳基产物的合成,包括通过使用芳基氯化物底物。
Scalable, Metal- and Additive-Free, Photoinduced Borylation of Haloarenes and Quaternary Arylammonium Salts
作者:Adelphe M. Mfuh、John D. Doyle、Bhuwan Chhetri、Hadi D. Arman、Oleg V. Larionov
DOI:10.1021/jacs.6b01376
日期:2016.3.9
We report herein a simple, metal- and additive-free, photoinduced borylation of haloarenes, including electron-rich fluoroarenes, as well as arylammoniumsalts directly to boronic acids. This borylation method has a broad scope and functional group tolerance. We show that it can be further extended to boronic esters and carried out on gram scale as well as under flow conditions.
Nickel-catalysed decarbonylative borylation of aroyl fluorides
作者:Zhenhua Wang、Xiu Wang、Yasushi Nishihara
DOI:10.1039/c8cc08504h
日期:——
The first Ni(cod)2/PPh3 catalyst system has been established for decarbonylative borylation of aroylfluorides with bis(pinacolato)diboron. A wide range of functional groups in the substrates were well tolerated. The ease of access of the starting aroylfluorides indicates that these results might become an alternative to the existing decarbonylation events.
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
The palladium-catalyzed borylation of aryl iodides with 4,4,6-trimethyl-1,3,2-dioxaborinane is described. The mild reaction conditions employed allow for aryl iodides with a wide variety of functional groups to be tolerated. The products of this borylation were coupled with arylhalides to give biaryls in good yields.