- Optimized TrkB Agonist Ameliorates Alzheimer's Disease Pathologies and Improves Cognitive Functions via Inhibiting Delta-Secretase
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BDNF/TrkB neurotropic pathway, essential for neural synaptic plasticity and survival, is deficient in neurodegenerative diseases including Alzheimer's disease (AD). Our previous works support that BDNF diminishes AD pathologies by inhibiting delta-secreta
- Chen, Chun,Ahn, Eun H.,Liu, Xia,Wang, Zhi-Hao,Luo, Shilin,Liao, Jianming,Ye, Keqiang
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p. 2448 - 2461
(2021/06/30)
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- An efficient method to prepare aryl acetates by the carbonylation of aryl methyl ethers or phenols
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Synthesis of valuable chemicals from lignin based compounds is critical for the application of biomass. Here, we develop a method of preparing aryl acetates by the carbonylation of aryl methyl ethers or phenols under low CO pressure. Good to excellent yields of aryl acetates were obtained using different substrates, and a possible reaction mechanism was proposed by conducting a series of control experiments. This method may provide a potential way for the utilization of lignin.
- Zhang, Dejin,Yang, Guoqiang,Xiong, Junping,Liu, Jia,Hu, Xingbang,Zhang, Zhibing
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p. 2683 - 2687
(2021/02/16)
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- HETEROCYCLIC FLAVONE DERIVATIVES, COMPOSITIONS, AND METHODS RELATED THERETO
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In certain embodiments, the disclosure relates to heterocyclic flavone derivatives, such as those described by formula provided herein, pharmaceutical compositions, and methods related thereto. In certain embodiments, the disclosure relates to methods of
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Page/Page column 29-30
(2020/03/02)
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- A new pathway via intermediate 4-amino-3-fluorophenol for the synthesis of regorafenib
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A practical synthetic route to regorafenib, in which the target compound was obtained via a 10-step synthesis starting from 2-picolinic acid, 4-chloro-3-(trifluoromethyl)aniline, and 3-fluorophenol, is reported. Crucial to the strategy is the preparation of 4-amino-3-fluorophenol via Fries and Beckman rearrangements using an economical and practical protocol. The main advantages of the route include inexpensive starting materials and an acceptable overall yield. A scale-up experiment was carried out to provide regorafenib with 99.96% purity in 46.5% total yield.
- Du, Fangyu,Zhou, Qifan,Shi, Yajie,Yu, Miao,Sun, Wenjiao,Chen, Guoliang
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supporting information
p. 576 - 586
(2019/02/01)
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- 5-6-5 azatricyclic compound and preparation method thereof
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The embodiment of the invention discloses a preparation method of a 5-6-5 azatricyclic compound. By using 3-fluorophenol as a raw material and through multistep cascade reactions including esterification, rearrangement, oximation, intramolecular cyclizati
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Paragraph 0033-0036
(2019/10/01)
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- Structure-Based Discovery and Optimization of Benzo [d] isoxazole Derivatives as Potent and Selective BET Inhibitors for Potential Treatment of Castration-Resistant Prostate Cancer (CRPC)
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The bromodomain and extra-terminal (BET) family proteins have gained increasing interest as drug targets for treatment of castration-resistant prostate cancer (CRPC). Here, we describe the design, optimization, and evaluation of benzo[d]isoxazole-containing compounds as potent BET bromodomain inhibitors. Cocrystal structures of the representative inhibitors in complex with BRD4(1) provided solid structural basis for compound optimization. The two most potent compounds, 6i (Y06036) and 7m (Y06137), bound to the BRD4(1) bromodomain with Kd values of 82 and 81 nM, respectively. They also exhibited high selectivity over other non-BET subfamily members. The compounds potently inhibited cell growth, colony formation, and the expression of AR, AR regulated genes, and MYC in prostate cancer cell lines. Compounds 6i and 7m also demonstrated therapeutic effects in a C4-2B CRPC xenograft tumor model in mice. These potent and selective BET inhibitors represent a new class of compounds for the development of potential therapeutics against CRPC.
- Zhang, Maofeng,Zhang, Yan,Song, Ming,Xue, Xiaoqian,Wang, Junjian,Wang, Chao,Zhang, Cheng,Li, Chenchang,Xiang, Qiuping,Zou, Lingjiao,Wu, Xishan,Wu, Chun,Dong, Baijun,Xue, Wei,Zhou, Yulai,Chen, Hongwu,Wu, Donghai,Ding, Ke,Xu, Yong
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p. 3037 - 3058
(2018/04/23)
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- A kind of benzo [d] different wicked zuozuo apperception compound and use thereof
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The invention relates to the technical field of chemical medicine, and particularly discloses a benzo[d]isoxazole compound shown as a general formula (A) and application thereof. The compound can effectively inhibit bromodomain of BET family proteins so as to block interaction between the BET family proteins and chromatin histone to adjust genetic transcription, cause changing of a downstream signal path and exert important influence on various diseases, so that the compound and a combination thereof can be used for preparing medicine for treating or preventing diseases like tumorigenesis, inflammation, viral infection, cell proliferation disorder, autoimmune diseases and septicemia.
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Paragraph 0331; 0333; 0335; 0336
(2018/06/14)
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- Porous coordination polymers of diverse topologies based on a twisted tetrapyridylbiaryl: Application as nucleophilic catalysts for acetylation of phenols
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Porous coordination polymers (CPs) with partially uncoordinated pyridyl rings based on rationally designed polypyridyl linkers are appealing from the point of view of their application as nucleophilic catalysts. A D2d--symmetric tetradentate organic linker L, that is, 2,2 ',6,6'-tetramethoxy-3,3',5,5'-tetrakis(4-pyridyl)biphenyl, was designed and synthesized for metal-assisted self-assembly aimed at porous CPs. Depending on the nature of the metal ion and the counter anion, the ligand L is found to function as a 3- or 4-connecting building block leading to porous CPs of diverse topologies. The reaction of L with Zn(NO3)2 and Cd(NO3)2 yields porous 2D CPs of "fes" topology, in which the tetrapyridyl linker L serves as a 3-connecting unit with its free pyridyl rings well exposed into the pores. The functional utility of these porous CPs containing uncoordinated pyridyl rings is demonstrated by employing them as efficient heterogeneous nucleophilic catalysts for acetylation of a number of phenols with varying electronic properties and reactivities.
- Seth, Saona,Venugopalan, Paloth,Moorthy, Jarugu Narasimha
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p. 2241 - 2249
(2015/01/30)
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- Discovery of small-molecule inhibitors selectively targeting the DNA-binding domain of the human androgen receptor
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The human androgen receptor (AR) is considered as a master regulator in the development and progression of prostate cancer (PCa). As resistance to clinically used anti-AR drugs remains a major challenge for the treatment of advanced PCa, there is a pressing need for new anti-AR therapeutic avenues. In this study, we identified a binding site on the DNA binding domain (DBD) of the receptor and utilized virtual screening to discover a set of micromolar hits for the target. Through further exploration of the most potent hit (1), a structural analogue (6) was identified demonstrating 10-fold improved anti-AR potency. Further optimization resulted in a more potent synthetic analogue (25) with anti-AR potency comparable to a newly FDA-approved drug Enzalutamide. Site-directed mutagenesis demonstrated that the developed inhibitors do interact with the intended target site. Importantly, the AR DBD inhibitors could effectively inhibit the growth of Enzalutamide-resistant cells as well as block the transcriptional activity of constitutively active AR splice variants, such as V7.
- Li, Huifang,Ban, Fuqiang,Dalal, Kush,Leblanc, Eric,Frewin, Kate,Ma, Dennis,Adomat, Hans,Rennie, Paul S.,Cherkasov, Artem
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supporting information
p. 6458 - 6467
(2014/10/15)
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- Iron-doped single-walled carbon nanotubes as new heterogeneous and highly efficient catalyst for acylation of alcohols, phenols, carboxylic acids and amines under solvent-free conditions
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Iron-doped single-walled carbon nanotubes (Fe/SWCNTs) represent an efficient and new heterogeneous reusable catalyst for the acylation of a variety of alcohols, phenols, carboxylic acids and amines with acid chlorides or acid anhydrides under solvent-free conditions. The reactions of various primary, secondary, tertiary, and benzylic alcohols, diols, phenols, as well as aromatic and aliphatic amines give acylated adducts in good to excellent yields.
- Sharghi, Hashem,Jokar, Mahboubeh,Doroodmand, Mohammad Mahdi
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experimental part
p. 426 - 442
(2011/04/15)
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- Enzymatic Baeyer-Villiger oxidation of benzaldehydes
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The selectivity of the chemical Baeyer-Villiger oxidation of benzaldehydes depends on steric and electronic factors, the type of oxidizing agent and the reaction conditions. Here we report on the enzymatic Baeyer-Villiger oxidation of fluorobenzaldehydes
- Moonen, Marielle J. H.,Westphal, Adrie H.,Rietjens, Ivonne M. C. M.,Van Berkel, Willem J. H.
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p. 1027 - 1034
(2007/10/03)
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- 7- (1, 3-THIAZOL-2-YL)THIO!-COUMARIN DERIVATIVES AND THEIR USE AS LEUKOTRIENE BIOSYNTHESIS INHIBITORS
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The instant invention provides compounds of Formula (I) which are leukotriene biosynthesis inhibitors. Compounds of formula (I) are useful as anti-asthmatic, anti-allergic, anti-inflammatory, cytoprotective and anti-artherosclerotic agents.
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- PROCESS FOR THE PREPARATION OF 6-(PERFLUOROALKYL)URACIL COMPOUNDS FROM CARBAMATE COMPOUNDS
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An improved process for the preparation of 6-(perfluoroalkyl)uracil compounds having structural formula (I) from carbamate compounds having structural formula (II).
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- Processes and intermediate compounds for the preparation of 2-(N,N-disubstituted) amino-4-(perfluoroalkyl)-1, 3- oxazin-6-one and 6-(perfluoroalkyl) uracil compounds
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An improved process and intermediate compounds for the preparation of 2-(N,N-disubstituted)amino-4-(perfluoroalkyl)-1,3-oxazin-6-one compounds having the structural formula I and an improved process for the preparation of 6-(perfluoroalkyl)uracil compound
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- Process for the preparation of 6-(perfluoroalkyl) uracil compounds form urea compounds
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An improved process for the preparation of 6-(perfluoroalkyl)uracil compounds having the structural formula I from urea compounds having the structural formula II
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- Process for the preparation of 6-(perfluoroalkyl) uracil compounds from 2-(N,N-disubstituted) amino-4-(perfluoroalkyl)-1,3-oxazin-6-one compounds
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An improved process for the preparation of 6-(perfluoroalkyl)uracil compounds having the structural formula I from 2-(N,N-disubstituted)amino-4-(perfluoroalkyl)-1,3-oxazin-6-one compounds having the structural formula II
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- Synthesis and in-vitro evaluation of platelet aggregation inhibitory activity of paeonol and its analogues
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Paeonol (1-(2-hydroxy-4-methoxyphenyl)ethanone) and a series of substituted 1-(2-hydroxyphenyl)ethanone derivatives were synthesized and screened as inhibitors of platelet aggregation. The compounds with the greatest anti-platelet potential among the series tested were 1-(2,5-dihydroxyphenyl)ethanone (65.36% inhibition at 300 μM against 5 μM ADP), paeonol(36.31%), 1-(2-hydroxy-5-methoxyphenyl)ethanone (24.47%), 1-(2-hydroxy-5-nitrophenyl) ethanone (30.40%) and 1-(5-chloro-2-hydroxy-4-methylphenyl)ethanone (24.43%).
- Akamanchi,Padmawar,Thatte,Rege,Dahanukar
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p. 323 - 329
(2007/10/03)
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- Urea-PETT compounds as a new class of HIV-1 reverse transcriptase inhibitors. 3. Synthesis and further structure-activity relationship studies of PETT analogues
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The further development of allosteric HIV-1 RT inhibitors in the urea analogue series of PETT (phenylethylthiazolylthiourea) derivatives is described here. The series includes derivatives with an ethyl linker (1-5) and racemic (6-16) and enantiomeric (17-
- H?gberg, Marita,Sahlberg, Christer,Engelhardt, Per,Noréen, Rolf,Kangasmets?, Jussi,Johansson, Nils Gunnar,?berg, Bo,Vrang, Lotta,Zhang, Hong,Sahlberg, Britt-Louise,Unge, Torsten,L?vgren, Seved,Fridborg, Kerstin,B?ckbro, Kristina
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p. 4150 - 4160
(2007/10/03)
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- 3-(1,2-benzisothiazol- and isoxazol-5-Y1)-2,4(1H,3H)-pyrimidinedione or thione and 3-(1,2-benzisothiazol- and isoxazol-5-y1)-4(3H)-pyrimidinone or thione herbicidal agents
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There are provided 3-(1,2-benzisothiazol- and isoxazol-5-yl)-2,4(1H,3H)-pyrimidinedione or thione compounds of formula I and 3-(1,2-benzisothiazol- and isoxazol-5-yl)-4(3H)-pyrimidinone or thione compounds of formula II Further provided are compositions and methods comprising those compounds for the control of undesirable plant species.
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- Acetylation of phenols in organic solvent catalyzed by a lipase from chromobacterium viscosum
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Lipase from Chromobacterium viscosum, absorbed on an inert support, was employed as catalyst for the esterification of monohydric phenols in organic solvent, with vinyl acetate as acyl donor. The effect of aromatic ring substitution on the initial rate of transesterification was investigated.
- Nicolosi,Piatelli,Sanfilippo
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p. 2477 - 2482
(2007/10/02)
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- Imidazopyrimidines and Imidazopyrazines: The Role of Nitrogen Position in Inotropic Activity
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Congestive heart failure is a major medical problem for which existing medicaments have provided limited benefit.Recent new experimental drugs, including imidazo- and imidazopyridines, have both inotropic and vasodilatory properties.Subtle c
- Spitzer, Wayne A.,Victor, Frantz,Pollock, G. Don,Hayes, J. Scott
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p. 1590 - 1595
(2007/10/02)
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- Nucleophilicity of Phenolates in the Reaction with p-Nitrophenyl Acetate in Ethanol
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The rate of release of p-nitrophenol in the reaction of nine substituted phenolates with p-nitrophenyl acetate has been determined by spectrophotometric measurements in absolute ethanol at 22 deg C.The phenolate anion is the reactive species and competes with ethoxide anion, arising from solvolysis of the phenolate, for nucleophilic attack on the ester carbonyl carbon atoms.From the observed reaction rates the solvolysis constants and the pKa values of the phenols were obtained.The second-order rate constants for phenoxide anions were correlated with the pKa values of the corresponding phenols giving a Broensted β value of 0.57.A comparison with the nucleophilic reactivity of arenethiolates towards the same substrate in ethanol has been made.The rate-determining step is probably the expulsion of the leaving group in the raection of arenethiolates, whereas it is the nucleophile attack in the reaction of phenoxides.
- Guanti, Giuseppe,Cevasco, Giorgio,Thea, Sergio,Dell'Erba, Carlo,Petrillo, Giovanni
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p. 327 - 330
(2007/10/02)
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