NHC-Cu-Catalyzed Enantioselective Hydroboration of Acyclic and Exocyclic 1,1-Disubstituted Aryl Alkenes
作者:Rosa Corberán、Nicholas W. Mszar、Amir H. Hoveyda
DOI:10.1002/anie.201102398
日期:2011.7.25
Tough nut to crack: Chiral bidentate N‐heterocyclic carbene copper complexes were designed that promote enantioselectivehydroborations of one of the most difficult substrate classes: acyclic and exocyclic 1,1‐disubstituted alkenes undergo reaction with >98 % site selectivity, in up to >98 % yield and e.r=96.5:3.5 (see scheme, B2(pin)2 = bis(pinacolato)diboron).
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.
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