Nickel-Catalyzed 1,2-Diarylation of Simple Alkenyl Amides
作者:Joseph Derosa、Roman Kleinmans、Van T. Tran、Malkanthi K. Karunananda、Steven R. Wisniewski、Martin D. Eastgate、Keary M. Engle
DOI:10.1021/jacs.8b11942
日期:2018.12.26
A nickel-catalyzed conjunctive cross-coupling of simple alkenyl amides with aryl iodides and arylboronic esters is reported. The reaction is enabled by an electron-deficient olefin (EDO) ligand, dimethyl fumarate, and delivers the desired 1,2-diarylated products with excellent regiocontrol. Under optimized conditions, a wide range of amides derived from 3-butenoic acid, 4-pentenoic acid, and allyl
报道了简单烯基酰胺与芳基碘化物和芳基硼酸酯的镍催化连接交叉偶联。该反应由缺电子烯烃 (EDO) 配体富马酸二甲酯实现,并提供具有出色区域控制的所需 1,2-二芳基化产物。在优化条件下,衍生自 3-丁烯酸、4-戊烯酸和烯丙胺的多种酰胺都是相容的底物。该方法代表了由天然酰胺官能团引导的区域控制 1,2-二芳基化的第一个例子。计算分析揭示了潜在的底物结合模式和 EDO 配体在还原消除步骤中的作用。
Nickel‐Catalyzed 1,2‐Diarylation of Alkenyl Carboxylates: A Gateway to 1,2,3‐Trifunctionalized Building Blocks
作者:Joseph Derosa、Taeho Kang、Van T. Tran、Steven R. Wisniewski、Malkanthi K. Karunananda、Tanner C. Jankins、Kane L. Xu、Keary M. Engle
DOI:10.1002/anie.201913062
日期:2020.1.13
delivers the desired 1,2-diarylated and 1,2-arylalkenylated products with excellent regiocontrol. To demonstrate the synthetic utility of the method, a representative product is prepared on gram scale and then diversified to eight 1,2,3-trifunctionalized building blocks using two-electron and one-electron logic. Using this method, three routes toward bioactive molecules are improved in terms of yield
Mild Copper-Catalyzed Addition of Arylboronic Esters to Di-tert-butyl Dicarbonate: An Easy Access to Methyl Arylcarboxylates
作者:Jing-Hui Liu、Guo-Qin Hu、Jin-Di Xu、Xiao-Bo Su、Cai Wang、Li-Wei Yao
DOI:10.1055/a-1377-7369
日期:2021.5
An efficient copper-catalyzedaddition of arylboronic esters to (Boc)2O was developed. The reaction can be conducted under exceedingly mild conditions and is compatible with a variety of synthetically relevant functional groups. It therefore represents a useful alternative route for the synthesis of methyl arylcarboxylates. A preliminary mechanistic study indicated the involvement of an addition–elimination
Ni-Catalyzed 1,2-Diarylation of Alkenyl Ketones: A Comparative Study of Carbonyl-Directed Reaction Systems
作者:Roman Kleinmans、Omar Apolinar、Joseph Derosa、Malkanthi K. Karunananda、Zi-Qi Li、Van T. Tran、Steven R. Wisniewski、Keary M. Engle
DOI:10.1021/acs.orglett.1c01447
日期:2021.7.16
2-diarylation of alkenyl ketones with aryl iodides and arylboronic esters is reported. Ketones with a variety of substituents serve as effective directing groups, offering high levels of regiocontrol. A representative product is diversified into a wide range of useful products that are not readily accessible via existing 1,2-diarylation reactions. Preliminary mechanistic studies shed light on the binding
Retention or Inversion in Stereospecific Nickel-Catalyzed Cross-Coupling of Benzylic Carbamates with Arylboronic Esters: Control of Absolute Stereochemistry with an Achiral Catalyst
作者:Michael R. Harris、Luke E. Hanna、Margaret A. Greene、Curtis E. Moore、Elizabeth R. Jarvo
DOI:10.1021/ja311783k
日期:2013.3.6
pivalates with aryl- and heteroarylboronic esters has been developed. The reaction proceeds with selective inversion or retention at the electrophiliccarbon, depending on the nature of the ligand. Tricyclohexylphosphine ligand provides the product with retention, while an N-heterocyclic carbene ligand provides the product with inversion.