A new process for the preparation of Ropinirole (1) and pharmaceutically acceptable hydrochloride salt thereof comprising reacting the compound (V) with nitromethane to obtain the compound of formula (II), which is reduced to compound (III) and alkylated to obtain compound (IV). The oxidation of the indole ring provides the compound of formula (I)
Optimizing the Local Chemical Environment on a Bifunctional Helical Peptide Scaffold Enables Enhanced Enantioselectivity and Cooperative Catalysis
作者:Adam X. Wayment、Mariur Rodriguez Moreno、Carter J. Jones、Gabriel J. Smith、Parker Jarman、Nayeli J. Garcia Morin、Morgan J. Coombs、Jacob A. Parkman、Connor D. Barlow、Stacy Allington Smith、Scott R. Burt、David J. Michaelis
DOI:10.1021/acs.orglett.2c00857
日期:2022.4.29
proof-of-concept study in which peptide-bound enamine and thiourea catalysts are used to facilitate the conjugate addition of cyclohexanone to nitroolefins. Our bifunctional peptide scaffold is modified to optimize the local environment around both catalysts to enhance both reactivity and enantioselectivity, affording selectivities of ≤95% ee. Circular dichroism, nuclear magnetic resonance nuclearOverhauser effect
我们描述了一项概念验证研究,其中肽结合的烯胺和硫脲催化剂用于促进环己酮与硝基烯烃的共轭加成。我们的双功能肽支架经过修改以优化两种催化剂周围的局部环境,以提高反应性和对映选择性,提供≤95% ee 的选择性。圆二色性、核磁共振核 Overhauser 效应研究和分子动力学模拟验证了我们的催化剂在溶液中的螺旋结构以及二级结构在催化中的重要性。
4-Indolyl- N -hydroxyphenylacrylamides as potent HDAC class I and IIB inhibitors in vitro and in vivo
A series of 4,5-indolyl-N-hydroxyphenylacrylamides, as HDAC inhibitors, has been synthesized and evaluated in vitro and in vivo. 4-Indolyl compounds 13 and 17 functions as potent inhibitors of HDAC1 (IC50 1.28 nM and 134 nM) and HDAC 2 (IC50 0.90 and 0.53 nM). N-Hydroxy-3-4-[2-(1H-indo1-4-y1)-ethylsulfamoyl]-phenyl}-actylamide (13) inhibited the human cancer cell growth of PC3, A549, MDA-MB-231 and AsPC-1 with a GI(50) of 0.14, 0.25, 0.32, and 0.24 mu M, respectively. In in vivo evaluations bearing prostate PC3 xenografts nude mice model, compound 13 suppressed tumor growth with a tumor growth inhibition (TGI) of 62.2%. Immunohistochemistry of protein expressions, in PC-3 xenograft model indicated elevated acetyl-histone 3 and prominently inhibited HDAC2 protein expressions. Therefore, compound 13 could be a suitable lead for further investigation and the development of selective HDAC 2 inhibitors as potent anti-cancer compounds. (C) 2017 Elsevier Masson SAS. All rights reserved.
Dopamine Receptor Ligands. Part 18: Modification of the Structural Skeleton of Indolobenzazecine-Type Dopamine Receptor Antagonists
作者:Dina Robaa、Christoph Enzensperger、Shams El Din Abul Azm、El Sayeda El Khawass、Ola El Sayed、Jochen Lehmann
DOI:10.1021/jm901291r
日期:2010.3.25
On the basis of the D(1/5)-selective dopamine antagonist LE 300 (1), an indolo[3,2-f]benzazecine derivative, we changed the annulation pattern of the heterocycles. The target compounds represent novel heterocyclic ring systems. The most constrained indolo[4,3a,3-ef]benzazecine 2 was inactive, but the indolo[4,3a,3-fg]benzazacycloundecene 3 showed antagonistic properties (functional Ca(2+) assay) with nanomolar affinities (radioligand binding) for all dopamine receptor subtypes, whereas the indolo[2,3-f]benzazecine 4 displayed a selectivity profile similar to 3 but with decreased affinities.