Nickel‐Catalyzed
<i>Suzuki‐Miyaura</i>
Cross‐Coupling Involving C−O Bond Activation
作者:Aoi Morishige、Yasuaki Iyori、Naoto Chatani
DOI:10.1002/hlca.202100089
日期:2021.8
An efficient Suzuki-Miyaura cross-coupling reaction of ortho-phenoxy-substituted aromatic amides with aryl boronates is described. The use of LiOtBu is crucial for the success of the reaction. An amidate anion, which is formed through deprotonation of the amide NH bond by LiOtBu, functions as a directinggroup to activate a C−O bond.
描述了邻苯氧基取代的芳香酰胺与芳基硼酸酯的有效Suzuki-Miyaura交叉偶联反应。LiO t Bu的使用对于反应的成功至关重要。通过 LiO t Bu对酰胺 NH 键的去质子化形成的酰胺阴离子作为导向基团来激活 CO 键。
Improved Palladium Catalysis in Suzuki‐Type Coupling of Benzotriazinones for o‐Aryl/Alkenyl Benzamides
作者:Minling Xü、Ke Xü、Gang Zou
DOI:10.1002/adsc.202400276
日期:——
A palladium catalyst system based on PdCl2(PPh3)2 or PdCl2(dppf) is reported for Suzuki-typecoupling of both N-aryl and alkyl benzotriazinones with aryl/alkenyl boronic acids to afford a series of ortho-aryl/alkenyl benzamides in yields up to 99%, showing improvements on catalytic efficiency, substrate scope and practicality. Scope and limitations of the improved protocol have been demonstrated with
Nickel-Mediated Decarbonylative Cross-Coupling of Phthalimides with in Situ Generated Diorganozinc Reagents
作者:Sarah E. Havlik、Jessica M. Simmons、Valerie J. Winton、Jeffrey B. Johnson
DOI:10.1021/jo200347j
日期:2011.5.6
The nickel-mediated cross-coupling of phthalimides with diorganozinc reagents proceeds via a decarbonylative process to produce ortho-substituted benzamides in high yields. In addition to tolerating diverse phthalimide functionality, including alkyl, aryl, and heteroatom containing substituents, this methodology proceeds smoothly with diorganozinc reagents prepared from aryl bromides and utilized without purification.
Nickel-Mediated Cross-Coupling of Boronic Acids and Phthalimides for the Synthesis of <i>Ortho</i>-Substituted Benzamides
作者:Ethan M. Heyboer、Rebecca L. Johnson、Megan R. Kwiatkowski、Trey C. Pankratz、Mason C. Yoder、Kimberly S. DeGlopper、Grace C. Ahlgrim、Joseph M. Dennis、Jeffrey B. Johnson
DOI:10.1021/acs.joc.9b03396
日期:2020.3.6
The decarbonylative coupling of phthalimides with aryl boronic acids provides ready access to a broad range of ortho-substituted benzamides. This nickel-mediated methodology extends reactivity from previously described air-sensitive diorganozinc reagents of limited availability to easily handled and widely commercially available boronic acids. The decarbonylative coupling is tolerant of a broad range
TBAB-Mediated Radical 5<i>-exo-trig ipso</i>
-Cyclization of 2-Arylbenzamide for the Synthesis of Spiro[cyclohexane-1,1′-isoindoline]-2,5-diene-3′,4-dione