Iminopyridine Oxazoline Iron Catalyst for Asymmetric Hydroboration of 1,1-Disubtituted Aryl Alkenes
作者:Jianhui Chen、Tuo Xi、Zhan Lu
DOI:10.1021/ol503282r
日期:2014.12.19
The highly regio- and enantioselective iron-catalyzed anti-Markovnikov hydroboration of 1,1-disubstitutedarylalkenes is reported by using a novel chiral iminopyridine oxazoline (IPO) ligand, in which the iminopyridine group is proposed to stabilize the iron and chiral oxazoline group to control enantioselectivity. This distinct class of reactive IPO ligands will likely be of high value for a large
Cobalt-Catalyzed Enantioselective Hydroboration of 1,1-Disubstituted Aryl Alkenes
作者:Lei Zhang、Ziqing Zuo、Xiaolong Wan、Zheng Huang
DOI:10.1021/ja5093908
日期:2014.11.5
We report the synthesis of cobalt complexes of novel iminopyridine-oxazoline (IPO) ligands and their application to the asymmetric hydroboration of 1,1-disubstitutedarylalkenes. The new catalysts afforded α-alkyl-β-pinacolatoboranes with exclusive regioselectivity in high yields with up to 99.5% ee. Furthermore, we have applied this method to an efficient synthesis of naproxen.
Highly regio- and enantioselective catalytic asymmetric hydroboration of α-substituted styrenyl derivatives
作者:Clément Mazet、David Gérard
DOI:10.1039/c0cc01547d
日期:——
The catalytic asymmetric hydroboration of a variety of 1,1-disubstituted olefins has been achieved with excellent yields, perfect regioselectivity and in some cases, high levels of enantioselectivity using readily accessible iridium catalyst.