An electrocatalytic allylic C−H alkylation reaction with carbon nucleophiles is reported, which employs an easily available cobalt–salen complex as the molecular catalyst. The method is characterized by its excellent functional group tolerance, substrate compatibility with both linear and branched terminal alkenes, and scalability (up to 200 mmol scale) with a low loading of electrolyte (down to 0
Intramolecular Aminoboration of Unfunctionalized Olefins
作者:Chun-Hua Yang、Yu-Shi Zhang、Wen-Wen Fan、Gong-Qing Liu、Yue-Ming Li
DOI:10.1002/anie.201505489
日期:2015.10.19
A direct and catalyst‐free method for the intramolecular aminoboration of unfunctionalizedolefins is reported. In the presence of BCl3 (1 equiv) as the sole boron source, intramolecular aminoboration of sulfonamide derivatives of 4‐penten‐1‐amines, 5‐hexen‐1‐amines, and 2‐allylanilines proceeded readily without the use of any catalyst. The boronic acids obtained after hydrolysis could be converted
Mn(OAc)<sub>3</sub>-Mediated Hydrotrifluoromethylation of Unactivated Alkenes Using CF<sub>3</sub>SO<sub>2</sub>Na as the Trifluoromethyl Source
作者:Bin Cui、Hui Sun、Yibo Xu、Lin Li、Lili Duan、Yue-Ming Li
DOI:10.1021/acs.joc.8b00633
日期:2018.6.1
A simple and efficient method for hydrotrifluoromethylation of unactivated alkenes was reported. The reaction relied on the single electron oxidation of a commercially available sodiumtrifluoromethanesulfinate (CF3SO2Na, Langlois’ reagent) using Mn(OAc)3·2H2O as the oxidant and the subsequent addition of trifluoromethyl radical to C═C double bonds. The reaction proceeded readily under mild conditions
报道了一种简单有效的未活化烯烃加氢三氟甲基化的方法。该反应依赖于使用Mn(OAc)3 ·2H 2 O作为氧化剂的市售三氟甲烷亚磺酸钠(CF 3 SO 2 Na,Langlois试剂)的单电子氧化,随后将三氟甲基自由基加到C═Cdouble债券。反应在温和条件下容易进行,并且对底物中的各种官能团具有良好的耐受性。通过氘化,自由基钟和TEMPO抑制实验研究了初步反应机理。
Electrochemical Azidocyanation of Alkenes
作者:Yun‐Tao Zheng、Hai‐Chao Xu
DOI:10.1002/anie.202313273
日期:2024.2.5
An electrochemical alkene azidocyanation reaction that is compatible with both alkyl and aryl alkenes was developed. The reactions involving aryl alkenes could be obtained with good enantioselectivities by employing a chiral ligand. Notably, this method of alkene difunctionalization employs readily accessible reagents and is distinguished by its demonstrated functional group tolerance.