安非他明及其类似物因其对大脑神经系统的强大而多样的作用而广泛应用于各种药物中,例如,( R )-4-甲氧基安非他明是治疗哮喘的福莫特罗的关键中间体。胺脱氢酶(AmDH)对酮进行生物催化还原胺化是合成手性伯胺的潜在方法,但通常需要高铵浓度来驱动胺化反应。在本研究中,通过迭代进化产生了Ls AmDH 突变体 W5–5 (T123G/S157T/S275G),它能够在 500 mM 铵浓度下催化 200 mM 4-甲氧基苯丙酮的还原胺化,得到 ( R )- 4-甲氧基苯丙胺,ee > 99%,分离收率 90%。该变体还催化其他苯丙酮类似物的还原胺化,在低铵浓度下具有高产率和优异的对映选择性。这将大大减少含铵废物的产生,使反应更加经济、更加绿色,为AmDHs的工业化应用奠定基础。
Successful use of a novel lux® i‐Amylose‐1 chiral column for enantioseparation of “legal highs” by HPLC
作者:Kian Kadkhodaei、Marlene Kadisch、Martin G. Schmid
DOI:10.1002/chir.23135
日期:2020.1
enantiomers may differ in their pharmacological effect. The aim of this study was to test a novel HPLCcolumn for the enantioseparation of a set of 112 NPS coming from different chemical groups and collected by internet purchases during the years 2010–2018. The CSP, namely Lux® 5 μm i‐Amylose‐1, LC Column 250 x 4.6 mm, was run in normal phase mode under isocratic conditions, UV detection was performed
这些术语背后隐藏着浴盐,熏蒸剂,清洁剂和空气清新剂,这些物质被算作“合法上限”。这些花哨的名字被用来装扮成合法的无害化合物,以规避市场营销的法律法规并增加销量。除了合成的经典非法药物(如苯丙胺,可卡因和摇头丸)以外,这些化合物的贸易(也称为新型精神活性物质(NPS))在当今并不罕见。在许多国家,NPS仍然不受药物管制。其中,有具有手性中心的兴奋剂,例如新的苯丙胺衍生物或卡西酮。关于两种可能的对映异构体的药理作用可能不同的事实知之甚少。这项研究的目的是测试一种新颖的HPLC色谱柱,该色谱柱用于对映分离2010年至2018年间通过互联网购买的来自不同化学族的112种NPS。CSP,即Lux®5μmi-Amylose-1,LC色谱柱250 x 4.6 mm,在等度条件下以正相模式运行,在245 nm和230 nm处进行UV检测,进样量为10μl,流速为为1毫升/分钟。使用由正己烷/异丙醇/二乙胺(90:10:0
Development of an engineered thermostable amine dehydrogenase for the synthesis of structurally diverse chiral amines
date exhibit limited substrate scope. Here, using directed evolution, we engineered a GkAmDH based on a thermostable phenylalanine dehydrogenase from Geobacillus kaustophilus. The newly developed AmDH is able to catalyze reductive amination of a diverse set of ketones and functionalized hydroxy ketones with ammonia or primary amines with up to >99% conversion, thus accessing structurally diverse chiral
Enantiomeric separation of Novel Psychoactive Substances by capillary electrophoresis using (+)-18-crown-6-tetracarboxylic acid as chiral selector
作者:Johannes S. Hägele、Martin G. Schmid
DOI:10.1002/chir.22981
日期:2018.8
of the enantiomers of these chiral NPS may differ can be assumed from a broad spectrum of active pharmaceutical ingredients. For this reason, analytical method development regarding enantiomeric separation for these classes of substances is of great pharmaceutical and medical interest. The aim of this work was to create an easy‐to‐prepare chiralcapillaryelectrophoresis method for the enantioseparation
MONOMETHYLVALINE COMPOUNDS HAVING PHENYLALANINE SIDE-CHAIN MODIFICATIONS AT THE C-TERMINUS
申请人:Seattle Genetics, Inc.
公开号:US20130123465A1
公开(公告)日:2013-05-16
Auristatin peptide analogs of MeVal-Val-Dil-Dap-Phe (MMAF) are provided having C-terminal phenylalanine residue side chain replacements or modifications which are provided alone or attached to ligands through various linkers. The related conjugates can target specific cell types to provide therapeutic benefit.
Monomethylvaline compounds having phenylalanine side-chain modification at the C-terminus
申请人:Seattle Genetics, Inc.
公开号:US10000555B2
公开(公告)日:2018-06-19
Auristatin peptide analogs of MeVal-Val-Dil-Dap-Phe (MMAF) are provided having C-terminal phenylalanine residue side chain replacements or modifications which are provided alone or attached to ligands through various linkers. The related conjugates can target specific cell types to provide therapeutic benefit.
提供的 MeVal-Val-Dil-Dap-Phe (MMAF) Auristatin 肽类似物具有 C 端苯丙氨酸残基侧链替换或修饰,可单独提供或通过各种连接体连接到配体上。相关共轭物可靶向特定细胞类型,提供治疗效果。