6943-90-4Relevant academic research and scientific papers
Application of maleimide compound as chitin synthase inhibitor
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Paragraph 0024-0027; 0032-0035, (2020/07/12)
The invention discloses an application of a maleimide compound as shown in a formula I. In the formula I, R0 is phenyl, benzyl, phenethyl, phenylpropyl, p-fluorophenyl, p-chlorophenyl, p-bromophenyl,p-methoxyphenyl, p-methylphenyl or p-hydroxyphenyl, R1 is hydrogen, methyl, phenyl or chlorine; and R2 is hydrogen, methyl, phenyl or chlorine. The provided maleimide compound has a good inhibition effect on chitin synthase.
Graphene Oxide as a Carbocatalyst for a Diels–Alder Reaction in an Aqueous Medium
Girish, Yarabhally R.,Pandit, Subrata,Pandit, Subhendu,De, Mrinmoy
, p. 2393 - 2398 (2017/09/11)
The Diels–Alder (DA) reaction, a [4+2] cycloaddition reaction, is highly important in synthetic organic chemistry and is frequently used in the synthesis of natural products containing six-membered rings. Herein, we report an efficient protocol for the DA reaction between 9-hydroxymethylanthracene and N-substituted maleimides using two-dimensional graphene oxide (GO) as a heterogeneous carbocatalyst in an aqueous medium at room temperature. High yields, a wide substrate scope, low temperature, excellent functional group tolerance, atom economy, and water as a green solvent are noteworthy features of this protocol. The heterogeneous GO catalyst can be easily recovered and used multiple times without any significant loss in catalytic activity.
Synthesis and anti-HIV-1 activity evaluation for novel 3a,6a-dihydro-1H-pyrrolo[3,4-c]pyrazole-4,6-dione derivatives
Liu, Guan-Nan,Luo, Rong-Hua,Zhou, Yu,Zhang, Xing-Jie,Li, Jian,Yang, Liu-Meng,Zheng, Yong-Tang,Liu, Hong
, (2016/09/23)
The search for new molecular constructs that resemble the critical two-metal binding pharmacophore and the halo-substituted phenyl functionality required for HIV-1 integrase (IN) inhibition represents a vibrant area of research within drug discovery. As reported herein, we have modified our recently disclosed 1-[2-(4-fluorophenyl)ethyl]-pyrrole-2,5-dione scaffolds to design 35 novel compounds with improved biological activities against HIV-1. These new compounds show single-digit micromolar antiviral potencies against HIV-1 and low toxicity. Among of them, compound 9g and 15i had potent anti-HIV-1 activities (EC50 50 /EC50 > 100). These two compounds have potential as lead compounds for further optimization into clinical anti-HIV-1 agents.
Iridium-catalyzed asymmetric hydrogenation of α-alkylidene succinimides
Liu, Yuanyuan,Zhang, Wanbin
supporting information, p. 2203 - 2206 (2013/03/28)
Not to be out PhOXed! The title reaction provides a new approach to chiral succinimide derivatives with excellent yields and ee values by using a low catalyst loading (0.05 mol %) and mild reaction conditions. Chiral 3-benzyl pyrrolidines and 1-hydroxypyrrolidine-2,5-diones, important structural motifs in natural products and pharmaceuticals, could be readily prepared. BARF -=tetrakis[3,5-bis(trifluoromethyl)phenyl]borate. Copyright
Antifungal, cytotoxic and SAR studies of a series of N-alkyl, N-aryl and N-alkylphenyl-1,4-pyrrolediones and related compounds
Sortino,Garibotto,Cechinel Filho,Gupta,Enriz,Zacchino
experimental part, p. 2823 - 2834 (2011/06/21)
The synthesis, in vitro evaluation and SAR studies of 67 maleimides and derivatives acting as antifungal agents are reported. A detailed SAR study supported by theoretical calculations led us to determine that: an intact maleimido ring appears to be necessary for a strong antifungal activity, dissimilarly affected by the substituents in positions 2 and 3. The best activities were shown by 2,3-nonsubstituted followed by 2,3 dichloro- and 2-methyl-substituted maleimides. They all were fungicide rather than fungistatic enhancing the importance of their antifungal activity. 2,3-Dimethyl and 2,3-diphenyl-maleimides possessed marginal or null activity. The presence of a flexible connecting chain in N-phenylalkyl maleimides appears not to be essential for antifungal activity, although its length shows a correlation with the antifungal behavior, displaying maleimides with alkyl chains of n = 3 and n = 4 the best antifungal activities in most fungi. Different substituents on the benzene ring did not have a clear influence on the activity. Values of chemical potential properties as well as of energy do not sufficiently discriminate between active and inactive compounds. Nevertheless, it was found that, although log P alone is not strong enough to properly predict the antifungal activity, the comparison of its values for compounds within the same sub-type, showed an enhancement of antifungal activity along with an increment of lipophilicity. In addition, the LUMO's electronic clouds of the highly active compounds showed to be concentrated on the imido ring, indicating that their carbon atoms are potential sites for nucleophilic attack. Same results were obtained from MEPs. Most of the active compounds did not show cytotoxic activity against human cancer cell lines and no one possessed hemolytic activity, indicating that their activity is selective to pathogenic fungi and that they are not toxic at MIC concentrations.
Design, synthesis, and biological activity of a novel series of 2,5-disubstituted furans/pyrroles as HIV-1 fusion inhibitors targeting gp41
Jiang, Shibo,Tala, Srinivasa R.,Lu, Hong,Zou, Peng,Avan, Ilker,Ibrahim, Tarek S.,Abo-Dya, Nader E.,Abdelmajeid, Abdelmotaal,Debnath, Asim K.,Katritzky, Alan R.
supporting information; experimental part, p. 6895 - 6898 (2011/12/22)
Based on molecular docking analysis of earlier results, we designed a series of 2,5-disubstituted furans/pyrroles (5a-h) as HIV-1 entry inhibitors. Compounds were synthesized by Suzuki-Miyaura cross coupling, followed by a Knoevenagel condensation or Witt
Synthesis and in vitro evaluation of N-substituted maleimide derivatives as selective monoglyceride lipase inhibitors
Matuszak, Nicolas,Muccioli, Giulio G.,Labar, Geoffray,Lambert, Didier M.
experimental part, p. 7410 - 7420 (2010/04/30)
The endocannabinoid 2-arachidonoylglycerol (2-AG) plays a major role in many physiological processes, and its action is quickly terminated via enzymatic hydrolysis catalyzed by monoglyceride lipase (MGL). Regulating its endogenous level could offer therapeutic opportunities; however, few selective MGL inhibitors have been described so far. Here, we describe the synthesis of N-substituted maleimides and their pharmacological evaluation on the recombinant human fatty acid amide hydrolase (FAAH) and on the purified human MGL. A few N-arylmaleimides were previously described (Saario, S. M.; Salo, O. M.; Nevalainen, T.; Poso, A.; Laitinen, J. T.; Jarvinen, T.; Niemi, R. Characterization of the Sulfhydryl-Sensitive Site in the Enzyme Responsible for Hydrolysis of 2-Arachidonoylglycerol in Rat Cerebellar Membranes. Chem. Biol. 2005, 12, 649-656) as MGL inhibitors, and along these lines, we present a new set of maleimide derivatives that showed low micromolar IC50 and high selectivity toward MGL vs FAAH. Then, structure-activity relationships have been investigated and, for instance, 1-biphenyl-4-ylmethylmaleimide inhibits MGL with an IC50 value of 790 nM. Furthermore, rapid dilution experiments reveal that these compounds act as irreversible inhibitors. In conclusion, N-substituted maleimides constitute a promising class of potent and selective MGL inhibitors.
N-Phenyl and N-phenylalkyl-maleimides acting against Candida spp.: Time-to-kill, stability, interaction with maleamic acids
Sortino, Maximiliano,Cechinel Filho, Valdir,Correa, Rogerio,Zacchino, Susana
, p. 560 - 568 (2008/09/18)
N-Phenyl and N-phenylalkyl maleimides (alkyl chain = (CH2)n; n = 0-4) and their respective open derivatives (maleamic acids) were evaluated against Candida spp. with the microbroth dilution method following the guidelines of CLSI (formely NCCLS). MIC values of maleimides without pre-incubation and submitted to different pre-incubation times into the growth media, time-to-kill studies as well as a time-dependent UV-spectroscopy study of the maleimides in water, led to determine that maleimides display antifungal activities with their intact maleimide ring, being in addition their activities not dependent on the length of the alkyl chain. They are not only fungistatic but fungicidal with very low MICs and MFCs, displaying strong fungicide activities not only against standardized but also clinical isolates of Candida albicans and non-albicans Candida spp.
Design and synthesis of a novel DNA-encoded chemical library using Diels-Alder cycloadditions
Buller, Fabian,Mannocci, Luca,Zhang, Yixin,Dumelin, Christoph E.,Scheuermann, Joerg,Neri, Dario
supporting information; experimental part, p. 5926 - 5931 (2009/05/31)
DNA-encoded chemical libraries are increasingly being employed for the identification of binding molecules to protein targets of pharmaceutical relevance. Here, we describe the synthesis and characterization of a DNA-encoded chemical library, consisting of 4000 compounds generated by Diels-Alder cycloaddition reactions. The compounds were encoded with unique DNA fragments which were generated through a stepwise assembly process and serve as amplifiable bar codes for the identification and relative quantification of library members.
