Výsledky vyhledávání - "Urs Brändli"

Akademický článek

Partial Depolymerization and Solubilization of Poly[(R)-3-hydroxybutanoate] (PHB) and Its Copolymer with (R)-3-Hydroxyvalerate (BIOPOL®) by Treatment with Li-Amides/LiCl in Tetrahydrofuran at Low Temperature

Autor: Dieter Seebach, Albert K. Beck, Urs Brändli, Dieter Müller, Michael Przybylski, Klaus Schneider

Publikováno v: CHIMIA, Vol 44, Iss 5 (1990)

The biopolymers PHB and PHB/PHV (mol. weight > 7·105 g·mol-1) from fermentations of certain lot numbers or PHB samples which had previously been precipitated from dichloroethane solution can be dissolved by treatment with excess lithium-di-isopropy

Externí odkaz: https://doaj.org/article/4be554a85cb7460e9373a4dbd1e4c442

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On the Macrolactonization of β-Hydroxy Acids. Crystal structures of the pentolide and the hexolide from (R)-3-hydroxybutanoic acid. Molecular modeling studies of the tetrolide

Autor: Urs Brändli, Dieter Seebach, Max Dobler, Klaus Schneider, Martin Egli, Michael Przybylski, Hans-Martin Müller

Publikováno v: Helvetica Chimica Acta. 72:1704-1717

The temperature and concentration dependence of the previously reported formation of oligolides from (R)or (S)-3-hydroxybutanoic acid under Yumuguchi’s macrolactonization conditions (2,4,6-trichlorobenzoyl chloride/base) was studied. While the cont

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6015b0d36e2defe711cb8c6602341bd5
https://doi.org/10.1002/hlca.19890720807

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Regioselektive Erzeugung und diastereoselektive Umsetzungen in β‐Stellung zur Nitrogruppe sekundärer Nitroalkane über α,β‐doppelt deprotonierte Derivate (Super‐enamine)

Autor: Urs Brändli, Dieter Seebach, Martin Eyer

Publikováno v: Chemische Berichte. 119:575-588

Offenkettige (2-Nitropropan, -butan, -pentan, -hexan) und cyclische (Nitrocyclopentan, -hexan) sekundare Nitroalkane (1) werden mit je einem Aquivalent n- und t-Butyllithium (THF/HMPT oder DMPU) doppelt deprotoniert. Es entstehen Losungen von Bis(lit

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a16a6a72db56f5fe1c8379b312f4c1cf
https://doi.org/10.1002/cber.19861190221

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High-Yield Synthesis of 20-, 24-, and 28-Membered Macropentolide, -hexolide, and -heptolide, Respectively, from (R)- or (S)-3-hydroxybutanoic acid underYamaguchi's macrolactonization conditions

Autor: Peter Schnurrenberger, Dieter Seebach, Michael Przybylski, Urs Brändli

Publikováno v: Helvetica Chimica Acta. 71:155-167

The macrocyclic pentolide 1, hexolide 2, and heptolide 3 constitute ca. 80% of the oligomers formed in ca. 50% yield from enantiomerically pure 3-hydroxybutanoic acid under Yamaguchi's macrolactonization conditions. The FAB mass spectra of the MH+, M

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2c1ab7a80302e23ae67e0d2f46e28b4f
https://doi.org/10.1002/hlca.19880710119

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