Iron-Catalyzed Asymmetric Hydrosilylation of 1,1-Disubstituted Alkenes
作者:Jianhui Chen、Biao Cheng、Minyi Cao、Zhan Lu
DOI:10.1002/anie.201411884
日期:2015.4.7
The highly regio‐ and enantioselective iron‐catalyzed anti‐Markovnikov hydrosilylation of 1,1‐disubstituted aryl alkenes was developed using iminopyridine oxazoline ligands to afford chiral organosilanes. Additional derivatization of these products lead to chiral organosilanols, cyclic silanes, phenol derivatives, and 3‐substituted 2,3‐dihydrobenzofurans.
Iron Catalyzed Isomerization of
<scp>α‐Alkyl</scp>
Styrenes to Access Trisubstituted Alkenes
作者:Songgen Xu、Guixia Liu、Zheng Huang
DOI:10.1002/cjoc.202000492
日期:2021.3
supported by phosphine‐pyridine‐oxazoline (PPO) ligand. The protocol provides an atom‐efficient and operationally simple approach to trisubstituted alkenes in high yields with excellent regio‐ and stereoselectivities under mild conditions. The results of deuterium‐labelling and radical trap experiments are consistent with an iron‐hydride pathway involving reversible alkene insertion and β‐H elimination.
Rhodium-catalyzed regioselective arylzincation of terminal allenes affords synthetically useful functionalized allylzinc reagents. The allylzinc reagents react with a variety of electrophiles such as acetomtnle, offering a more versatile three-component coupling reaction.