Directed ortho Metalation (DoM)-Linked Corriu–Kumada, Negishi, and Suzuki–Miyaura Cross-Coupling Protocols: A Comparative Study
作者:Victor Snieckus、Claude Quesnelle
DOI:10.1055/s-0037-1611053
日期:2018.11
the DoM strategy lends itself to the regioselective construction of diversely substitutedaromatics and heteroaromatics. A systematic study of the widely used, titled name reaction transition-metal-catalyzed cross-coupling reactions with attention to context with the directed ortho metalation (DoM) is reported. In general, the Suzuki–Miyaura and Negishi protocols show greater scope and better yields
致力于斯科特丹麦:至此,我们(以及缺席的KB )正在庆祝您的创造力和成就。 发布时间作为的一部分奉献给斯科特E.丹麦在他65之际特别节日的生日。 抽象的 报告了对广泛使用的标题反应过渡金属催化的交叉偶联反应的系统研究,并着眼于定向原金属化(D o M)。通常,Suzuki-Miyaura和Negishi方案比Corriu-Kumada方案具有更大的范围和更高的产量,尽管后者定性地以最快的速度进行,但功能基团的耐受性较低。据证明,Negishi工艺可用于具有亲核试剂和碱敏感功能的底物,其效率可与Suzuki-Miyaura反应媲美。这些交叉偶联反应与D o M策略的联系使其适用于不同取代的芳族化合物和杂芳族化合物的区域选择性结构。 报告了对广泛使用的标题反应过渡金属催化的交叉偶联反应的系统研究,并着眼于定向原金属化(D o M)。通常,Suzuki-Miyaura和Negishi方案比Cor
Rhodium(III)-Catalyzed Intramolecular Hydroarylation, Amidoarylation, and Heck-type Reaction: Three Distinct Pathways Determined by an Amide Directing Group
作者:Tyler A. Davis、Todd K. Hyster、Tomislav Rovis
DOI:10.1002/anie.201307631
日期:2013.12.23
reaction pathways of a wide variety of tethered alkenes can be accessed through changing the amide directing group. This provides an efficient route to a myriad of complex polycyclic products, many containing newly formed all‐carbonquaternary centers. Amidoarylations can diastereoselectively deliver products with up to three contiguous stereocenters.
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‐Difluoroallylation of Aryl Halides and Pseudo Halides with Difluoroallylboron Reagents in High Regioselectivity
作者:Shu Sakamoto、Trevor W. Butcher、Jonathan L. Yang、John F. Hartwig
DOI:10.1002/anie.202111476
日期:2021.12
coupling of a difluoroallylboronate with aryl and heteroaryl halides and triflates provides a convenient and broadly applicable synthesis of difluoroallylarenes. The difluoroallyl boron reagent is formed by a copper-catalyzed defluorinative borylation of the inexpensive reagent 3,3,3-trifluoropropene, and the products undergo a wide range of reactions to a series of difluoro-substituted analogs of common
NiCl2-catalyzed P–C coupling reaction of arylhalides and various > P(O)H-compounds under MW conditions without directly added P-ligands. The reactivity of a few aryl derivatives in the Pd(OAc)2-catalyzed Hirao reaction was also studied. An induction period was observed in the reaction of bromobenzene and diphenylphosphine oxide. Finally, the less known copper(I)-promoted P–C coupling reactions were investigated
Low-Temperature Ag/Pd-Catalyzed Decarboxylative Cross-Coupling of Aryl Triflates with Aromatic Carboxylate Salts
作者:Lukas J. Gooßen、Paul P. Lange、Nuria Rodríguez、Christophe Linder
DOI:10.1002/chem.200903319
日期:2010.4.6
At 50°C lower than the best known copper catalysts, a catalytic silver(I)/palladium(II) system allows the decarboxylative cross‐coupling of arenecarboxylates with aryl triflates at temperatures as low as 120 °C. Remarkably, polychlorinated and many heterocyclic arenecarboxylates are converted for the first time in high yields. FG=functional group.