نتایج جستجو برای: amino alcohols

تعداد نتایج: 217020  

Journal: :Journal of General Microbiology 1971

2016
Shuangshuang Zhang Jun Yu Huiying Li Dongsen Mao Guanzhong Lu

Developing the high-efficient and green synthetic method for chiral amino alcohols is an intriguing target. We have developed the Mg(2+)-doped Cu/ZnO/Al2O3 catalyst for hydrogenation of L-phenylalanine methyl ester to chiral L-phenylalaninol without racemization. The effect of different L-phenylalanine esters on this title reaction was studied, verifying that Cu/ZnO/Al2O3 is an excellent cataly...

Journal: :Journal of Synthetic Organic Chemistry, Japan 1991

Journal: :Chemical communications 2013
Jia-Qi Li Pher G Andersson

A bidentate iridium NHC-phosphine complex has been developed and applied to the N-monoalkylation of aromatic amines with a wide range of primary alcohols and to the N-heterocyclization of amino alcohols. This reaction resulted in high isolated product yields, even at room temperature and under solvent-free conditions.

Journal: :Organic & biomolecular chemistry 2007
Fung Kei Cheung Aidan M Hayes David J Morris Martin Wills

A series of catalysts have been prepared for use in the asymmetric transfer hydrogenation of ketones. The complexes were prepared using a [4 + 2] cycloaddition reaction at a key step in the reaction sequence. This provides a means for the synthesis of catalysts with modifications at specific sites.

Journal: :Organic letters 2012
Hogyu Lee Jun Hee Kim Won Koo Lee Jae-Hoon Jung Hyun-Joon Ha

A new and efficient preparation of pharmacologically and biologically important 2,5-disubstituted 6-azaindoles was achieved from cyclizations of aziridin-2-yl dipropargylic alcohols as adducts of two propargyl groups to ethyl 1-benzylaziridine-2-carboxylate. The sequential cyclizations include pyrrole formation and a novel base-catalyzed intramolecular acetylenic Schmidt reaction.

2015
Shaheen M. Sarkar Md. Eaqub Ali Md. Lutfor Rahman Mashitah Mohd Yusoff

Optically active (−)-ephedrine, (−)-norephedrine, and (−)-prolinol were immobilized onto cubic mesoporousMCM-48 silica.The immobilized amino alcohols served as a heterogeneous chiral catalyst for the asymmetric addition of diethylzinc to aldehydes and transfer hydrogenation to ketones. The developed catalytic process yielded optically enriches secondary aromatic alcohols with 92–99% conversion ...

Journal: :Chemical communications 2008
Bernhard J Ueberbacher Herfried Griengl Hansjörg Weber

An ortho-metalation method for free ferrocenyl alcohols has been developed, which allows preparation of planar chiral ferrocene derivatives with high yields and diastereoselectivities.

Journal: :Organic & biomolecular chemistry 2012
Oskari K Karjalainen Ari M P Koskinen

The vicinal amino alcohol is a common motif in natural products and pharmaceuticals. Amino acids constitute a natural, inexpensive, and enantiopure choice of starting material for the synthesis of such functionalities. However, the matters concerning diastereoselectivity are not obvious. This Perspective takes a look in the field of diastereoselective synthesis of vicinal amino alcohols startin...

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