作者:Yan Li、Wan Nie、Zhe Chang、Jia-Wang Wang、Xi Lu、Yao Fu
DOI:10.1038/s41929-021-00688-w
日期:——
few examples of its use in asymmetriccross-coupling. Here we report a cobalt-catalysed enantioselective C(sp3)–C(sp3) coupling reaction, namely, alkene hydroalkylation, to access chiral fluoroalkanes. This reaction represents a catalyst-controlled enantioselective coupling mode in which a tailor-made auxiliary is unnecessary; via this reaction, an aliphatic C–F stereogenic centre can be introduced at
Nucleophilic fluorination using imidazolium based ionic liquid bearing tert-alcohol moiety
作者:Sandip S. Shinde、Sunil N. Patil、Amruta Ghatge、Pradeep Kumar
DOI:10.1039/c5nj00481k
日期:——
An ionicliquid bearing tert-butanol moiety ([mim-tOH][OMs]) was employed as an organocatalyst in the nucleophilicfluorination of a variety of substrates containing halogen/sulfonate as a leaving group. Low reactive metal fluorides, including KF, were used as a fluoride source in the reaction. Ionicliquid [mim-tOH][OMs] has shown excellent selectivity in nucleophilicfluorination of 2-(3-bromopropyloxy)naphthalene
tert-Alcohol-functionalized imidazolium ionic liquid: catalyst for mild nucleophilic substitution reactions at room temperature
作者:Sandip S. Shinde、Hyung Min Chi、Byoung Se Lee、Dae Yoon Chi
DOI:10.1016/j.tetlet.2009.09.064
日期:2009.12
Encouraged by a synergistic effect on nucleophilicfluorination, an imidazolium mesylate salt (1a) possessing two different solvent properties in one molecule—tert-alcohol and ionicliquid was utilized in various nucleophilicsubstitutionreactions. By a comparison study with 1-n-butyl-3-methylimidazolium ionicliquids, 1a has proved to be a better phase transfer catalyst even under room temperature conditions
作者:Yan Li、Deguang Liu、Lei Wan、Jun-Yang Zhang、Xi Lu、Yao Fu
DOI:10.1021/jacs.2c06279
日期:2022.8.3
Regiodivergent alkyne hydroalkylation to generate different isomers of an alkene from the same alkyne starting material would be beneficial; however, it remains a challenge. Herein, we report a ligand-controlledcobalt-catalyzed regiodivergent alkyne hydroalkylation. The sensible selection of bisoxazoline (L1) and pyridine–oxazoline (L8) ligands led to reliable and predictable protocols that provided
Modular and Fast Synthesis of Versatile Secondary α,α‐Dialkyl Boronates via Deoxygenative Alkylboration of Aldehydes
作者:Wenhao Xu、Purui Zheng、Jun Zhou、Zihao Hu、Tao XU
DOI:10.1002/anie.202214213
日期:2022.12.5
Secondaryα,α-dialkyl boronates are widely used derivatives due to their great versatility. Herein, we report an unprecedented method to access those products directly from the deoxygenativealkylboration of aldehydes. A sequence of difunctionalization can be achieved smoothly from the readily available aldehydes instead of commonly used alkenes in only two steps.