نتایج جستجو برای: enantioselectivity

تعداد نتایج: 1696  

Journal: :Organic chemistry frontiers 2022

Correction for ‘Computational insights on the origin of enantioselectivity in reactions with diarylprolinol silyl ether catalysts via a radical pathway’ by Ching Lam et al. , Org. Chem. Front. 2022, https://doi.org/10.1039/d2qo00354f.

Journal: :Proceedings of the National Academy of Sciences 2005

Journal: :Journal of Biomedical Science and Engineering 2013

Journal: :Chemical communications 2015
Ziqing Zuo Lei Zhang Xuebing Leng Zheng Huang

A series of iron complexes of chiral iminopyridine-oxazoline (IPO) ligands have been synthesized. The most sterically hindered iron catalyst exhibits excellent activity (up to 99% yield) and high enantioselectivity (up to 93% ee) in asymmetric hydrosilylation of aryl ketones.

Journal: :Chemical communications 2005
Lijin Xu Kim Hung Lam Jianxin Ji Jing Wu Qing-Hua Fan Wai-Hung Lo Albert S C Chan

An air-stable catalyst system Ir-(P-Phos) catalyst was found to be highly effective in the asymmetric hydrogenation of quinoline derivatives. The catalyst immobilized in DMPEG was efficiently recovered and reused eight times, retaining reactivity and enantioselectivity.

Journal: :Chemical communications 2014
Liwei Zou Xiaoze Bao Yuanyuan Ma Yuming Song Jingping Qu Baomin Wang

The Michael addition of 3-substituted oxindoles to nitroolefins was catalyzed by a novel tartrate-derived guanidine in high yield with excellent diastereo- and enantioselectivity. This method showed an extraordinarily broad substrate scope in terms of both reaction partners.

Journal: :Organic & biomolecular chemistry 2012
Chunhua Luo Yu Jin Da-Ming Du

A chiral sulfonamide primary amine-organocatalysed, highly enantioselective Michael addition of malonates to enones has been developed. This reaction afforded the corresponding products in excellent yields (up to 99%) and excellent enantioselectivity (up to 99% ee).

Journal: :Chemical communications 2011
Paul Benndorf Jelena Jenter Larissa Zielke Peter W Roesky

Enantiomerically pure lutetium complexes were synthesized as the first rare earth metal complexes containing a chiral amidinate ligand. The catalytic activity and the enantioselectivity in hydroamination reactions were studied.

Journal: :Chemical communications 2013
Zachary X Giustra Kian L Tan

Glycerol is an ideal building block for the synthesis of complex molecules, because it is inexpensive and highly functionalized. We report the desymmetrization of glycerol through silyl transfer, using a chiral organic catalyst in high yield and enantioselectivity.

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