Electrochemical Aziridination by Alkene Activation Using a Sulfamate as the Nitrogen Source
作者:Jin Li、Wenhao Huang、Jingzhi Chen、Lingfeng He、Xu Cheng、Guigen Li
DOI:10.1002/anie.201801106
日期:2018.5.14
direct aziridination of triaryl‐substituted alkenes was achieved by means of an electrochemical process that could extend to multisubstituted styrenes. Specifically, hexafluoroisopropanol sulfamate was used as a nucleophilic nitrogen source. Mechanistic experiments suggest that this electrochemical process proceeds by stepwise formation of two C−N bonds through reactions between cationic carbon species
Reduction of titanocene dichloride with dysprosium: access to a stable titanocene(<scp>ii</scp>) equivalent for phosphite-free Takeda carbonyl olefination
A new titanocene(ii) equivalent obtained from the reduction of titanocene dichloride with dysprosium allows phosphite-free and simplified Takeda carbonyl olefination reactions.
diazo(aryl)methyl(diaryl)phosphine oxides with aldehydes and ketones generates benzo-δ-phosphinolactones in low to good yields with 1,1-diarylalk-1-enes as byproducts under microwave irradiation. Diazo(aryl)methyl(diaryl)phosphine oxides first undergo a Wolff rearrangement to form diaryl(aryl)phosphenes, which further react with aldehydes and ketones to afford benzo-δ-phosphinolactones and β-phosphinolactones
Direct Arylation of Alkenes with Aryl Iodides/Bromides through an Organocatalytic Radical Process
作者:Chang-Liang Sun、Yi-Fan Gu、Bin Wang、Zhang-Jie Shi
DOI:10.1002/chem.201101562
日期:2011.9.19
A radical addition: A KOtBu‐complex‐promoted radicalarylation of polysubstituted alkenes with aryliodides/bromides proceeds in high efficiency (see scheme). Benzofuran derivatives are also produced starting from readily available allyl 2‐iodophenyl ethers.
自由基添加:多取代烯烃与芳基碘化物/溴化物的KO t Bu络合物促进的自由基芳基化反应高效进行(参见方案)。苯并呋喃衍生物也是从容易获得的烯丙基2-碘苯基醚开始生产的。
Electrochemical Hydrogenation with Gaseous Ammonia
作者:Jin Li、Lingfeng He、Xu Liu、Xu Cheng、Guigen Li
DOI:10.1002/anie.201813464
日期:2019.2.4
serves as high‐energy‐density hydrogen‐storage material. It is important to develop new reactions able to utilize ammonia as a hydrogen source directly. Herein, we report an electrochemical hydrogenation of alkenes, alkynes, and ketones using ammonia as the hydrogen source and carbon electrodes. A variety of heterocycles and functional groups, including for example sulfide, benzyl, benzyl carbamate, and