106429-51-0Relevant articles and documents
Supported Rhodium (Rh@PS) Catalyzed Benzimidazoles Synthesis Using Ethanol/Methanol as C2H3/CH Source
Sharma, Saurabh,Sharma, Ajay,Yamini,Das, Pralay
, p. 67 - 72 (2019)
An effective and stable polystyrene supported rhodium (Rh@PS) nano-catalyst has been synthesized by following reduction-deposition approach and applied for the selective benzimidazoles synthesis from 1,2-phenylenediamines and ethanol/methanol as C2H3/CH source. The ethanol/methanol in the presence of trace amounts of aerobic oxygen under Rh@PS catalysed condition, first participated in oxidation of alcohol followed by consecutive condensation, cyclization and hydrogen elimination reactions with 1,2-phenylenediamine gave the desired products in good yields. The Rh@PS catalyst in a single system performed both oxidation and reduction reactions in a selective/specific manner and applied for large substrate scope. Easy recovery, handling, stability, recyclability of the catalyst and less chance of metal contamination with the products are the added advantages of the process. (Figure presented.).
Oxalic/malonic acids as carbon building blocks for benzazole, quinazoline and quinazolinone synthesis
Sharma, Saurabh,Bhattacherjee, Dhananjay,Das, Pralay
, p. 1337 - 1342 (2018)
An oxidant, base and metal free methodology has been developed for the synthesis of various 2-substituted and non-substituted benzazoles, quinazolines and quinazolinones using oxalic/malonic acids as an in situ carbon source. This methodology is applicable for a wide range of substituted o-phenylenediamine, o-aminothiophenol, o-aminophenol and o-aminobenzamide containing various functional groups and provides good to excellent yields of the corresponding product. Furthermore an easy workup procedure, high yield and easy isolation of products are key features of this methodology. The developed protocol is also applicable for the gram scale synthesis of benzimidazoles.
Rhodium catalyzed 2-alkyl-benzimidazoles synthesis from benzene-1,2-diamines and tertiary alkylamines as alkylating agents
Yamini,Sharma, Saurabh,Das, Pralay
, (2021)
Substituted 2-alkyl-benzimidazoles were synthesized from benzene-1,2-diamine and tertiary amines as alkylating agent under polystyrene supported rhodium (Rh@PS) nanoparticles (NPs) catalyzed conditions. The heterogeneous rhodium catalyst was applied first time for the synthesis of 2-alkyl-benzimidazoles. The reaction followed through oxidation of alkylamines, transamination, and oxidative cyclisation with benzene-1,2-diamines for the corresponding products synthesis with good yields. The process is applicable for vast substrate scope, several functional groups are tolerable, and the Rh@PS catalyst is recyclable up to four cycles without significant loss in catalytic activity.
Sustainable photocatalytic synthesis of benzimidazoles
Montini, Tiziano,Gombac, Valentina,Delgado, Juan J.,Venezia, Anna Maria,Adami, Gianpiero,Fornasiero, Paolo
, (2021/03/14)
Among the 17 Sustainable Development Goals presented by the United Nations in 2015, great attention is devoted to the production of goods and chemicals by use of renewable raw materials, by recycling of products and by extensive use of renewable energy sources. In this context, photocatalysis attracted great attention for the possibility to exploit Solar light to promote the desired chemical reactions. Besides its use in degradation of pollutants and in the production of fuels, some efforts have been devoted in the development of photocatalytic processes for the synthesis of fine chemicals with high added-value. In this work, we investigated the sustainable photocatalytic synthesis of benzimidazole derivatives through a one-pot, tandem process starting from a nitro compound and ethanol. By a photocatalytic approach, ethanol is dehydrogenated producing the hydrogen required for reduction of nitro groups and the aldehyde required for cyclization and production of the benzimidazole unit. Co-doping of TiO2 with B and N is beneficial to increase the photocatalytic activity in H2 production from ethanol. The effect of various metal co-catalysts (Pt, Pd Ag, Cu) have been evaluated on H2 production rate and on selectivity in the synthesis of substituted benzimidazoles: Pt showed the highest selectivity in the desired products while Pd demonstrated a great activity for hydrodehalogenation, with potential interest for degradation of persistent pollutants.
BICYCLIC HETEROARYL DERIVATIVES AS ECTONUCLEOTIDE PYROPHOSPHATASE PHOSPHODIESTERASE 1 INHIBITORS
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Paragraph 0296; 0501, (2020/10/21)
The present disclosure provides certain bicyclic heteroaryl compounds that inhibit ectonucleotide pyrophosphatase/phosphodiesterase 1 (ENPP1) enzymatic activity and are therefore useful for the treatment of diseases and conditions modulated at least in part by ENPP1. In some embodiments, the bicyclic heteroaryl compounds includes those of Formula (I). Also provided herein are pharmaceutical compositions containing such compounds and processes for preparing such compounds.
C-3 NOVEL TRITERPENONE WITH C-17 REVERSE AMIDE DERIVATIVES AS HIV INHIBITORS
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Page/Page column 38; 39, (2018/03/06)
The present invention relates to C-3 novel triterpenone with C-17 reverse amide compounds of Formula (I); and pharmaceutically acceptable salts thereof, wherein ring Formula (II), R1, R2, R3, R4, R5, R6, R7, 'n' and 'm' are as defined in Formula (I). The invention also relates to C-3 novel triterpenone with C-17 reverse amide derivatives, related compounds, and pharmaceutical compositions useful for the therapeutic treatment of viral diseases and particularly HIV mediated diseases.
Microwave-assisted synthesis of polysubstituted benzimidazoles by heterogeneous Pd-catalyzed oxidative C-H activation of tertiary amines
De Luca, Lidia,Porcheddu, Andrea
supporting information; experimental part, p. 5791 - 5795 (2011/11/06)
Tertiary amines can be used in place of aldehydes and carboxylic derivatives as partners in the synthesis of benzimidazoles. Dehydrogenative amine activation under heterogeneous catalysis was developed for the direct transformation of tertiary amines into benzimidazoles. Good yields and efficient recovery and recycling of the catalyst are some of the advantages of this new methodology, which shows that a simple alkene is used as the overall oxidative agent. Enhanced reaction rates were observed by using focused microwave heating.
Potent inhibitors of tRNA-guanine transglycosylase, an enzyme linked to the pathogenicity of the Shigella bacterium: Charge-assisted hydrogen bonding
Hoertner, Simone R.,Ritschel, Tina,Stengl, Bernhard,Kramer, Christian,Schweizer, W. Bernd,Wagner, Bjoern,Kansy, Manfred,Klebe, Gerhard,Diederich, Francois
, p. 8266 - 8269 (2008/09/19)
Improving inhibition: tRNA-Guanine transglycosylase (TGT) is a newly recognized target to reduce the pathogenicity of disease-causing Shigella bacteria. A potent family of inhibitors of this enzyme has been developed by structure-based design. Crystallographic data and pKa, analysis suggest that the aminoimidazole moiety of the central lin-benzoguanine scaffold is protonated and stabilization of the complexes results from charge-assisted hydrogen bonding. (Figure Presented).
THIAZOLONES FOR USE AS PI3 KINASE INHIBITORS
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Page/Page column 106, (2008/06/13)
Invented is a method of inhibiting the activity/function of PI3 kinases using substituted thiazolones. Also invented is a method of treating one or more disease states selected from: autoimmune disorders, inflammatory diseases, cardiovascular diseases, ne
NOVEL CHEMICAL COMPOUNDS
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Page/Page column 85, (2010/02/13)
This invention relates to newly identified compounds for inhibiting hYAK3 proteins and methods for treating diseases associated with the imbalance or inappropriate activity of hYAK3 proteins.
