Ni-Catalyzed β-Alkylation of Cyclopropanol-Derived Homoenolates
作者:L. Reginald Mills、Cuihan Zhou、Emily Fung、Sophie A. L. Rousseaux
DOI:10.1021/acs.orglett.9b03435
日期:2019.11.1
Metalhomoenolates are valuable synthetic intermediates which provide access to β-functionalized ketones. In this report, we disclose a Ni-catalyzed β-alkylation reaction of cyclopropanol-derived homoenolates using redox-active N-hydroxyphthalimide (NHPI) esters as the alkylating reagents. The reaction is compatible with 1°, 2°, and 3° NHPI esters. Mechanistic studies imply radical activation of the
Photocatalytic Redox-Neutral Approach to Diarylmethanes
作者:Guozhe Guo、Yong Yuan、Xiazhen Bao、Xuehui Cao、Tongzhi Sang、Jiayuan Wang、Congde Huo
DOI:10.1021/acs.orglett.1c02523
日期:2021.9.3
reaction of indole-3-acetic acid NHPI esters with indoles using a Ru photosensitizer to deliver a wide range of symmetrical and unsymmetrical 3,3′-bisindolylmethane derivatives. Furthermore, the reaction is readily adapted to the preparation of a wide variety of diarylmethane derivatives.
The Formal Cross‐Coupling of Amines and Carboxylic Acids to Form sp
<sup>3</sup>
–sp
<sup>3</sup>
Carbon–Carbon Bonds
作者:Zirong Zhang、Tim Cernak
DOI:10.1002/anie.202112454
日期:2021.12.20
acid C−C coupling would be a valuable addition to the synthetic toolbox of carbon–carbon bond-formingreactions. Using miniaturized high-throughput experimentation, we have developed the first amine–acid cross-coupling to form C(sp3)−C(sp3) bonds based on preactivation of the building blocks and nickelcatalysis.
Chemoselective Union of Olefins, Organohalides, and Redox-Active Esters Enables Regioselective Alkene Dialkylation
作者:Tao Yang、Yi Jiang、Yixin Luo、Joel Jun Han Lim、Yu Lan、Ming Joo Koh
DOI:10.1021/jacs.0c09922
日期:2020.12.23
tolerates a wide array of complex functionalities, and enables regiodivergent addition of two primary alkyl groups bearing similar electronic and steric attributes across aliphatic C═C bonds with exquisite control of site selectivity. Utility is underscored by the concise synthesis of bioactive compounds and postreaction functionalizations leading to structurally diverse scaffolds. DFT studies revealed