Catalytic Decarboxylation/Carboxylation Platform for Accessing Isotopically Labeled Carboxylic Acids
作者:Andreu Tortajada、Yaya Duan、Basudev Sahoo、Fei Cong、Georgios Toupalas、Antoine Sallustrau、Olivier Loreau、Davide Audisio、Ruben Martin
DOI:10.1021/acscatal.9b01921
日期:2019.7.5
integrated catalytic decarboxylation/carboxylation for accessing isotopicallylabeled carboxylic acids with 13CO2 or 14CO2 is described. The method shows a wide scope under mild conditions, even in the context of late-stage functionalization, and does not require stoichiometric organometallics, thus complementing existing carbon-labeling techniques en route to carboxylic acids.
描述了用于访问具有13 CO 2或14 CO 2的同位素标记的羧酸的集成催化脱羧/羧化反应。该方法在温和条件下显示了宽泛的范围,即使在后期功能化的情况下也是如此,并且不需要化学计量的有机金属,因此可以补充现有的碳标记技术(在羧酸生产过程中)。
Radical C(sp<sup>3</sup>)–H Heck-type Reaction of <i>N</i>-Alkoxybenzimidoyl Chlorides with Styrenes to Construct Alkenols
作者:Di Fang、Yidan Zhang、Yiyun Chen
DOI:10.1021/acs.orglett.2c00593
日期:2022.3.18
the first radical C(sp3)–H Heck-type reaction of aliphaticalcohols for selective δ- and ε-alkenol synthesis by photoredox catalysis. N-Alkoxybenzimidoyl chlorides are developed as novel alkoxyl radical precursors with tunable redox potentials. Various alkenols can be constructed by the inert C(sp3)–H Heck-type reaction of 4-cyano-N-alkoxybenzimidoyl chlorides with styrene derivatives under redox-neutral
Site‐Selective, Remote sp
<sup>3</sup>
C−H Carboxylation Enabled by the Merger of Photoredox and Nickel Catalysis
作者:Basudev Sahoo、Peter Bellotti、Francisco Juliá‐Hernández、Qing‐Yuan Meng、Stefano Crespi、Burkhard König、Ruben Martin
DOI:10.1002/chem.201902095
日期:2019.7.5
A photoinduced carboxylation of alkyl halides with CO2 at remote sp3 C−Hsitesenabled by the merger of photoredox and Ni catalysis is described. This protocol features a predictable reactivity and siteselectivity that can be modulated by the ligand backbone. Preliminary studies reinforce a rationale based on a dynamic displacement of the catalyst throughout the alkyl side chain.
Ligand-Controlled Regiodivergent Catalytic Amidation of Unactivated Secondary Alkyl Bromides
作者:Andreu Tortajada、Jose Tiago Menezes Correia、Eloisa Serrano、Alicia Monleón、Alberto Tampieri、Craig S. Day、Francisco Juliá-Hernández、Ruben Martin
DOI:10.1021/acscatal.1c02913
日期:2021.8.20
A regiodivergent Ni-catalyzed amidation of unactivated secondary alkyl bromides is described. The site-selectivity of the amidation event is dictated by subtle differences on the ligand backbone, allowing introduction of the amide function at either the original sp3 carbon–halide bond or at distal sp3 C–H sites within an alkyl side-chain via chain-walking scenarios.
描述了未活化仲烷基溴的区域发散性 Ni 催化酰胺化。酰胺化事件的位点选择性取决于配体骨架上的细微差异,允许在原始 sp 3碳卤键或烷基侧链内的远端 sp 3 C-H 位点引入酰胺功能链式行走场景。
Shonle et al., Journal of the American Chemical Society, 1936, vol. 58, p. 586