在某些神经退行性疾病中,神经元一氧化氮合酶 (nNOS) 会产生破坏性水平的一氧化氮 (NO)。因此,重要的是开发对 nNOS 有选择性的抑制剂,这些抑制剂不会干扰其他 NOS 亚型,尤其是内皮 NOS (eNOS),这对心血管系统的正常运作至关重要。虽然我们已经成功开发了有效的异构体选择性抑制剂,例如先导化合物1和2,合成的难易性和生物利用度一直存在问题。在这里,我们描述了一系列新的化合物,包括 NOS 抑制剂复合物的晶体结构,与先导化合物相比,它们具有易于合成和良好生物特性的优点。这些结果为进一步的构效关系 (SAR) 研究提供了基础,以指导同工酶选择性抑制剂的进一步改进。
We describe here a Ni-catalyzed Negishi coupling reaction to prepare 1,2-dialkyl enol ethers in a stereoconvergent fashion. This method employs readily available and bench-stable α-oxy-vinylsulfones as electrophiles. The C–sulfone bond in the α-oxy-vinylsulfone motif is cleaved chemoselectively in these reactions. The mildconditions are tolerant of a variety of functional groups on both partners,
我们在这里描述了一种 Ni 催化的 Negishi 偶联反应,以立体会聚的方式制备 1,2-二烷基烯醇醚。该方法使用容易获得且工作台稳定的 α-氧-乙烯基砜作为亲电试剂。在这些反应中,α-氧-乙烯基砜基序中的 C-砜键被化学选择性地裂解。温和的条件可以容忍双方的各种官能团,因此代表了烯醇醚合成的一般策略。α-氧-乙烯基砜的这种独特的反应性表明它们在交叉偶联反应中作为亲电伙伴的进一步应用。
Substituted 2-aminopyridines as inhibitors of nitric oxide synthase
申请人:Merck & Co., Inc.
公开号:US05972975A1
公开(公告)日:1999-10-26
Substituted 2-aminopyridine compounds of Formula (I) and pharmaceutically acceptable salts which have been found useful in the treatment of nitric oxide synthase mediated diseases and disorders. ##STR1##
公式(I)中的2-氨基吡啶化合物及其药用盐已被发现在治疗一氧化氮合酶介导的疾病和紊乱中具有用处。
Cobalt‐Catalyzed Cross‐Coupling of Functionalized Alkylzinc Reagents with (Hetero)Aryl Halides
作者:Ferdinand H. Lutter、Lucie Grokenberger、Philipp Spieß、Jeffrey M. Hammann、Konstantin Karaghiosoff、Paul Knochel
DOI:10.1002/anie.201914490
日期:2020.3.27
A combination of 10 % CoCl2 and 20 % 2,2'-bipyridine ligands enables cross-coupling of functionalized primary and secondary alkylzinc reagents with various (hetero)arylhalides. Couplings with 1,3- and 1,4-substituted cycloalkylzinc reagents proceeded diastereoselectively leading to functionalized heterocycles with high diastereoselectivities of up to 98:2. Furthermore, alkynyl bromides react with
作者:Isabelle Wellhöfer、Karla Frydenvang、Simona Kotesova、Andreas M. Christiansen、Jonas S. Laursen、Christian A. Olsen
DOI:10.1021/acs.joc.9b00218
日期:2019.4.5
β-peptoids containing N-(S)-1-(1-naphthyl)ethyl (Ns1npe) side chains can fold into unique triangular prism-shaped helices. We report herein the successful introduction of amino groups onto robustly folded β-peptoid helices by construction and incorporation of novel chiral building blocks. This is the first example of an X-ray crystal structure of a linear β-peptoid containing more than one type of side chain
Protection of primary amines as N- substited 2,5-dimethylpyrroles
作者:Stephen P. Breukelman、G. Denis Meakins、Malcolm D. Tirel
DOI:10.1039/c39820000800
日期:——
Protection of a primaryamine group against attack by organic or aqueous solutions of strong bases or nucleophiles is achieved by incoporation into an N- substituted 2,5-dimethylpyrrole system from which the amine group is regenerated by treatment with hydroxylamine hydrochloride.