been developed. This approach employs an earth-abundant and inexpensive manganese complex, Mn2 (CO)10 , as the catalyst and visible light as the energy input. Using this strategy, site-selective chlorination of unactivated C(sp3 )-H bonds of aliphatic amines and intramolecular/intermolecular chloroaminations of unactivatedalkenes were readily realized under mild reaction conditions, thus providing efficient
N-Heterocyclic carbene–gold(I)-catalyzed carboheterofunctionalization of alkenes with arylboronic acids
作者:Shifa Zhu、Lijuan Ye、Wanqing Wu、Huanfeng Jiang
DOI:10.1016/j.tet.2013.09.097
日期:2013.12
A new approach to the synthesis of pyrrolidine, tetrahydrofuran, and imidazolidin-2-one via N-heterocyclic carbene–gold(I)-catalyzed intramolecular amino- or oxyarylation reactions from a wide variety of alkene substrates such as N-allyl amides, alcohols, carboxylic acids, and ureas in the presence of Selectfluor under mild conditions has been developed.
A facile and efficient enantioselectivebromoaminocyclization of unsaturated sulfonamides has been developed using an amino-thiocarbamate catalyst. A range of enantioenriched pyrrolidines were prepared with up to 99% yield and 99% ee. The corresponding lactams could be obtained through oxidation of the pyrrolidines.
Access to Saturated Thiocyano-Containing Azaheterocycles via Selenide-Catalyzed Regio- and Stereoselective Thiocyanoaminocyclization of Alkenes
作者:Wei Wei、Lihao Liao、Tian Qin、Xiaodan Zhao
DOI:10.1021/acs.orglett.9b02834
日期:2019.10.4
An efficient route for the synthesis of saturated thiocyano-containing azaheterocycles by selenide-catalyzed regio- and stereoselective thiocyanoaminocyclization of alkenes is disclosed. The desired products were obtained in moderate to highyields under mild conditions. The generality of this method was elucidated by its efficient application in thiocyano oxycyclization of alkenes.
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