Cobalt-Catalyzed CH Arylations with Weakly-Coordinating Amides and Tetrazoles: Expedient Route to Angiotensin-II-Receptor Blockers
作者:Jie Li、Lutz Ackermann
DOI:10.1002/chem.201500552
日期:2015.4.7
Cobalt‐catalyzed CH arylations enabled the synthesis of biaryl tetrazoles, which are key structural motifs in antihypertensive angiotensin‐II‐receptor blockers. Thus, weakly‐coordinating benzamides were employed for step‐economical CH arylations with ample scope. Further, a low‐valent NHC complex enabled first cobalt‐catalyzed CH functionalization by tetrazole assistance.
Palladium Catalyzed Regioselective Synthesis of Substituted Biaryl Amides through Decarbonylative Arylation of Phthalimides
作者:Partha Kumar Samanta、Papu Biswas
DOI:10.1021/acs.joc.8b03157
日期:2019.4.5
cross-coupling of N-substituted phthalimides with arylhalide provides a single step direct access of a wide range of synthetically appealing ortho-substituted biarylamides in high yields through unique carbonyl (CO) replacement. The reaction proceeds through a ligand-freecondition and is well tolerant to the diverse functionality of both imide and halide units. The reaction negates any requirement of
Iron-catalyzed oxidative biaryl cross-couplings <i>via</i> mixed diaryl titanates: significant influence of the order of combining aryl Grignard reagents with titanate
作者:Kun Ming Liu、Juan Wei、Xin Fang Duan
DOI:10.1039/c5cc00514k
日期:——
The mixed diaryl titanates were used for the first time to modify the reactivity of two aryl Grignardreagents. Two titanate intermediates, Ar[Ar'Ti(OR)3]MgX and Ar'[ArTi(OR)3]MgX, formed via alternating the sequence of combining Grignardreagents with ClTi(OR)3 showed a significant reactivity difference. Taking advantage of such different reactivity, two highly structurally similar aryl groups could
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
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。