在这项研究中,我们描述了一个两步过程,涉及用双(儿茶酚)二硼对α-和β-氨基氧化还原活性酯进行有效的可见光诱导脱羧硼基化,然后用1,8-二氨基萘(DANH)进行转氨2 )。在此一锅法中,以中等至优异的产率获得了一系列硼酰胺。事实证明,即使在流动条件下进行,光化学过程也非常有效,反应时间较短,并且可大规模合成 DAN 硼酸酯。
Azacyclosteroid histamine-3 receptor ligands, pharmaceutical compositions comprising such compounds, and methods for using such compounds and compositions are described herein.
[EN] AZACYCLOSTEROID HISTAMINE-3 RECEPTOR LIGANDS<br/>[FR] LIGANDS DE RECEPTEUR H3 DE L'HISTAMINE AZACYCLOSTEROIDE
申请人:ABBOTT LAB
公开号:WO2005100377A1
公开(公告)日:2005-10-27
Azacyclosteroid histamine-3 receptor ligands, pharmaceutical compositions comprising such compounds, and methods for using such compounds and compositions are described herein.
Biocatalytic racemization of α-hydroxycarboxylic acids using a stereo-complementary pair of α-hydroxycarboxylic acid dehydrogenases
作者:Anne Bodlenner、Silvia M. Glueck、Bettina M. Nestl、Christian C. Gruber、Nina Baudendistel、Bernhard Hauer、Wolfgang Kroutil、Kurt Faber
DOI:10.1016/j.tet.2009.06.051
日期:2009.9
Biocatalyticracemization of aliphatic, (aryl)aliphatic and aromatic α-hydroxycarboxylicacids was achieved via a reversible oxidation-reductionsequence using a pair of stereo-complementary Prelog- and anti-Prelog d- and l-α-hydroxyisocaproate dehydrogenases from Lactobacillus confusus DSM 20196 and Lactobacillus paracasei DSM 20008, resp., overexpressed in Escherichia coli. The mild reaction conditions
An oxidation system in which iodic acid (HIO3) is used as an oxidant in the presence of N-hydroxyphthalimide (NHPI) permitted the selective hydroxylation of tertiary C–H bonds and the lactonization of carboxylicacidscontaining a tertiarycarbon center. These reactions are operationally simple and proceed under metal-free conditions using commercially available reagents, thus offering an ideal tool
Azacyclosteroid histamine-3 receptor ligands, pharmaceutical compositions comprising such compounds, and methods for using such compounds and compositions are described herein.