Results 41 to 50 of about 58,506 (161)

Enantio- and diastereoselective synthesis of γ-amino alcohols [PDF]

Chemical Communications, 2015
Two complementary catalytic diastereoselective methods for the synthesis of N -PMP-protected γ-amino alcohols from the corresponding ketones have been developed.
Verkade, J.M.M., Quaedflieg, P.J.L.M., Verzijl, G.K.M., Lefort, L., Delft, F.L. van, Vries, J.G. de, Rutjes, F.P.J.T.   +6 more
openaire   +3 more sources

Comparative analysis of amino acids and volatile compounds as markers in Lueyang black-boned chicken and Arbor Acres broilers

Poultry Science
Derived from a long history of artificial and natural selection, Lueyang black-boned chicken is preferred by consumers due to its unique meat characteristics.
Jiantao Yang, Kailong Qin, Qianggang Wang, Shuailong Li, Yufei Zhu, Xiaojun Yang   +5 more
doaj   +1 more source

Synthesis of Chiral 1,4-Disubstituted-1,2,3-Triazole Derivatives from Amino Acids

Molecules, 2009
A versatile method for the synthesis of chiral 1,4-disubstituted-1,2,3-triazole derivatives starting from easily accessible naturally occurring D-or L-amino acids as chiral synthons is described.
Morten Grøtli, Peter Dinér, Karin Krainz, Itedale Namro Redwan, Michael Klein   +4 more
doaj   +1 more source

Microwave-Enhanced Sulphated Zirconia and SZ/MCM-41 Catalyzed Regioselective Synthesis of β-Amino Alcohols Under Solvent-Free Conditions

Molecules, 2008
A solvent-free approach for the regioselective synthesis of β-amino alcohols inshorter reaction times and higher yields, compared to conventional heating is described.
Eduardo González-Zamora, Leticia Lomas-Romero, Deyanira Angeles-Beltrán, C. Xochitl Hernández-Reyes, Guillermo Negrón-Silva   +4 more
doaj   +1 more source

Anhydrous Titanium(III) chloride as a New Lewis-Acid Catalyst for Ring Opening of Epoxides with Aromatic Amines

Natural Product Communications, 2007
Anhydrous titanium(III) chloride was found to be a simple and efficient Lewis acid catalyst for ring opening of epoxides at ambient temperature. The reaction proceeded smoothly with anilines as well as azide ion as nucleophiles to give the corresponding ...
Suchitra Bhatt, Sandip K. Nayak
doaj   +1 more source

Stereoselective Synthesis and Cytoselective Toxicity of Monoterpene-Fused 2-Imino-1,3-thiazines

Molecules, 2014
Starting from pinane-, apopinane- and carane-based 1,3-amino alcohols obtained from monoterpene-based β-amino acids, a library of monoterpene-fused 2-imino-1,3-thiazines as main products and 2-thioxo-1,3-oxazines as side-products were prepared via two ...
Zsolt Szakonyi, István Zupkó, Reijo Sillanpää, Ferenc Fülöp   +3 more
doaj   +1 more source

Highly Enantioselective Addition of Phenylethynylzinc to Aldehydes Catalyzed by Chiral Cyclopropane-Based Amino Alcohols

Molecules, 2013
The enantioselective addition of phenylethynylzinc to aldehydes catalyzed by a series of cyclopropane-based amino alcohol ligands 7 was investigated.
Bing Zheng, Zhiyuan Li, Feipeng Liu, Yanhua Wu, Junjian Shen, Qinghua Bian, Shicong Hou, Ming Wang   +7 more
doaj   +1 more source

A Mild and Regioselective Ring-Opening of Aziridines with Acid Anhydride Using TBD or PS-TBD as a Catalyst

Molecules, 2015
The ring-opening of N-tosylaziridines with various acid anhydrides catalyzed by 5 mol % of 1,5,7-triazabicyclo[4,4,0]dec-5-ene (TBD) afforded the corresponding β-amino esters in excellent yields under mild reaction conditions. Polymer-supported catalyst,
Satoru Matsukawa, Yasutaka Mouri
doaj   +1 more source

Synthesis, Characterization and Structural Study of the Two Ionic Hydrogen-Bonded Organic Frameworks Based on Sterically Crowded Bifunctional Moieties

Chemistry
Small bifunctional molecules are attractive for use as models in different areas of knowledge. How can their functional groups interact in solids? This is important to know for the prediction of the physical and chemical properties of the materials based
Kira E. Vostrikova, Vladimir P. Kirin, Denis G. Samsonenko   +2 more
doaj   +1 more source

Chemoselective O-acylation of hydroxyamino acids and amino alcohols under acidic reaction conditions: History, scope and applications

Beilstein Journal of Organic Chemistry, 2015
Amino acids, whether natural, semisynthetic or synthetic, are among the most important and useful chiral building blocks available for organic chemical synthesis.
Tor E. Kristensen
doaj   +1 more source