Výsledky vyhledávání - "Juergen Liebscher"

Synthesis of Optically Active Condensed Tetrahydropyridines from α-Amino Esters

Autor: Christoph Bender, Faltz Heike Faltz Heike, Juergen Liebscher

Publikováno v: Synthesis. 2006:2907-2922

Optically active condensed dihydropyridones 6 could be synthesized from a-amino esters 2 or 3 and o-bromobenzyl bromides or heterocyclic analogues 1. These products resemble isoquinoline and β-carboline alkaloid structures and could be stereoselecti

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bc572de5ed032884e5c5f67725a3b990
https://doi.org/10.1055/s-2006-950192

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Optically active nitroalkenes—synthesis, addition reactions and transformation into amino acids

Autor: Jan Huebner, M. Paetzel, Juergen Liebscher

Publikováno v: Tetrahedron. 58:10485-10500

Optically active nitroalkenes 4 were synthesized via Henry reaction. Conjugate addition of vinylmagnesium bromide to 4 gave nitroalkane syn-5 while cyclopropanation with sulfur ylides or dibromocarbene afforded nitrocyclopropanes 8, 10 and 11 in a di

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::09ae8ea1f7426137f866a006ef47c179
https://doi.org/10.1016/s0040-4020(02)01406-0

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3-Ylidenepiperazine-2,5-diones as versatile organic substrates

Autor: Juergen Liebscher, Shangde Jin

Publikováno v: Chemical Society Reviews. 28:251-259

3-Ylidenepiperazine-2,5-diones and 3,6-diylidenepiperazine-2,5-diones are cyclic dipeptides consisting of one or two didehydroamino acid moieties, respectively. Some compounds of this series occur in nature. They can easily be synthesised by several

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::980b7fe7112cfe6736cc408212a9a091
https://doi.org/10.1039/a804743j

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1-Amino-4-aryl-2(1H)-pyrimidinthione: Acidit�t und Komplexbildung mit Mn(II), Co(II), Ni(II), Zn(II), Cd(II), Pb(II) und Ag(I)

Autor: G. Zahn, Eberhard Hoyer, Sylke Schmidt, Juergen Liebscher, Beate Riemer, Frank Dietze

Publikováno v: Journal f�r Praktische Chemie/Chemiker-Zeitung. 336:500-505

1-Amino-4-aryl-2(1H)-pyrimidinethiones: Acidity and Complex Formation with Nonferrous Metal Ions and Ag(I) Acid dissociation constants of new 2, 3 and already known 1 substituted 1-amino-4-aryl-2(1H)-pyrimidinethiones and stability constants of their

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cb6d1a956e955cf691dff5077cfe918a
https://doi.org/10.1002/prac.19943360604

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