41964-04-9Relevant academic research and scientific papers
Biocatalytic Strategy for Highly Diastereo- and Enantioselective Synthesis of 2,3-Dihydrobenzofuran-Based Tricyclic Scaffolds
Vargas, David A.,Khade, Rahul L.,Zhang, Yong,Fasan, Rudi
supporting information, p. 10148 - 10152 (2019/07/04)
2,3-Dihydrobenzofurans are key pharmacophores in many natural and synthetic bioactive molecules. A biocatalytic strategy is reported here for the highly diastereo- and enantioselective construction of stereochemically rich 2,3-dihydrobenzofurans in high enantiopurity (>99.9% de and ee), high yields, and on a preparative scale via benzofuran cyclopropanation with engineered myoglobins. Computational and structure-reactivity studies provide insights into the mechanism of this reaction, enabling the elaboration of a stereochemical model that can rationalize the high stereoselectivity of the biocatalyst. This information was leveraged to implement a highly stereoselective route to a drug molecule and a tricyclic scaffold featuring five stereogenic centers via a single-enzyme transformation. This work expands the biocatalytic toolbox for asymmetric C–C bond transformations and should prove useful for further development of metalloprotein catalysts for abiotic carbene transfer reactions.
Dioxazolones as masked ester surrogates in the Pd(ii)-catalyzed direct C-H arylation of 6,5-fused heterocycles
Saxena, Paridhi,Maida, Neha,Kapur, Manmohan
supporting information, p. 11187 - 11190 (2019/09/30)
A simple and effective Pd(ii)-catalyzed regioselective C(2)-H arylation of 6,5-fused heterocycles with dioxazolones as a masked ester surrogate under mild conditions is reported. The significance of the arylation is highlighted by the new reactivity demonstrated in dioxazolones via proximal C-H activation of the cyclic carbonate of the hydroxamic acid functionality under protic conditions.
Direct Dimesitylborylation of Benzofuran Derivatives by an Iridium-Catalyzed C?H Activation with Silyldimesitylborane
Shishido, Ryosuke,Sasaki, Ikuo,Seki, Tomohiro,Ishiyama, Tatsuo,Ito, Hajime
supporting information, p. 12924 - 12928 (2019/11/05)
Direct dimesitylborylation of benzofuran derivatives by a C?H activation catalyzed by an iridium(I)/N-heterocyclic carbene (NHC) complex in the presence of Ph2MeSi-BMes2 afforded the corresponding dimesitylborylation products in good to high yield with excellent regioselectivity. This method provides a straightforward route to donor–(π-spacer)–acceptor systems with intriguing solvatochromic luminescence properties.
Palladium-Catalyzed Regioselective C-2 Arylation of Benzofurans with N′-Acyl Arylhydrazines
Cao, Jun,Chen, Zi-Li,Li, Shu-Min,Zhu, Gao-Feng,Yang, Yuan-Yong,Wang, Cong,Chen, Wen-Zhang,Wang, Jian-Ta,Zhang, Ji-Quan,Tang, Lei
supporting information, p. 2774 - 2779 (2018/06/21)
A novel ligand-free palladium-catalyzed C-2 arylation of benzofurans has been developed using N′-acyl arylhydrazines as the coupling partners and TEMPO as an oxidant. This protocol features a wide functional-group tolerance and highly regioselective products with good to excellent yields.
Visible light-induced monofluoromethylenation of heteroarenes with ethyl bromofluoroacetate
Yu, Wei,Xu, Xiu-Hua,Qing, Feng-Ling
supporting information, p. 6564 - 6567 (2016/08/09)
Visible light-induced monofluoromethylenation of benzofurans and benzothiophenes with ethyl bromofluoroacetate was developed. This method provided a convenient access to novel α-fluoro-α-heteroarylesters under mild reaction conditions.
Zeolite-catalyzed synthesis of 2,3-unsubstituted benzo[b]furans via the intramolecular cyclization of 2-aryloxyacetaldehyde acetals
Sun, Nan,Huang, Peng,Wang, Yifan,Mo, Weimin,Hu, Baoxiang,Shen, Zhenlu,Hu, Xinquan
supporting information, p. 4835 - 4841 (2015/07/27)
An efficient and environmentally benign heterogeneous catalytic process for the synthesis of 2,3-unsubstituted benzo[b]furans has been established via the intramolecular cyclization of 2-aryloxyacetaldehyde acetals. By utilizing tin-exchanged H-β zeolite (Sn-β) as catalyst, a wide range of functionalized 2,3-unsubstituted benzo[b]furans could be prepared in good to excellent yields. The Sn-β zeolite catalyst also exhibited excellent shape selectivity on the cyclization of meta-substituted 2-aryloxyacetaldehyde acetals, and 6-substituted isomers were preferably formed up to 97% regio-selectivity. Moreover, Sn-β zeolite could be easily recovered and reused without any noticeable activity loss.
Thiosemicarbazones as Aedes aegypti larvicidal
Da Silva, Jo?o Bosco P.,Navarro, Daniela Maria Do A.F.,Da Silva, Aluizio G.,Santos, Geanne K.N.,Dutra, Kamilla A.,Moreira, Diogo Rodrigo,Ramos, Mozart N.,Espíndola, José Wanderlan P.,De Oliveira, Ana Daura T.,Brondani, Dalci José,Leite, Ana Cristina L.,Hernandes, Marcelo Zaldini,Pereira, Valéria R.A.,Da Rocha, Lucas F.,De Castro, Maria Carolina A.B.,De Oliveira, Beatriz C.,Lan, Que,Merz, Kenneth M.
, p. 162 - 175 (2015/06/22)
Abstract A set of aryl- and phenoxymethyl-(thio)semicarbazones were synthetized, characterized and biologically evaluated against the larvae of Aedes aegypti (A. egypti), the vector responsible for diseases like Dengue and Yellow Fever. (Q)SAR studies were useful for predicting the activities of the compounds not included to create the QSAR model as well as to predict the features of a new compound with improved activity. Docking studies corroborated experimental evidence of AeSCP-2 as a potential target able to explain the larvicidal properties of its compounds. The trend observed between the in silico Docking scores and the in vitro pLC50 (equals -log LC50, at molar concentration) data indicated that the highest larvicidal compounds, or the compounds with the highest values for pLC50, are usually those with the higher docking scores (i.e., greater in silico affinity for the AeSCP-2 target). Determination of cytotoxicity for these compounds in mammal cells demonstrated that the top larvicide compounds are non-toxic.
HETEROCYCLIC COMPOUNDS FOR THE INHIBITION OF PASK
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Page/Page column 68, (2012/09/21)
Disclosed herein are new heterocyclic compounds and compositions and their application as pharmaceuticals for the treatment of disease. Methods of inhibiting PAS Kinase (PASK) activity in a human or animal subject are also provided for the treatment of diseases such as diabetes mellitus.
PREPARATION OF BENZOFURANS AND USE THEREOF AS SYNTHETIC INTERMEDIATES
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Page/Page column 38, (2011/09/15)
The present invention provides several synthetic methods for preparing N-(2-butylbenzofuran-5-yl)-N-(methylsulfonyl)methanesulfonamide, a compound of formula (3), an intermediate in the preparation of Dronedarone. The present invention further provides a process for preparing Dronedarone, comprising the steps of converting 2-butyl-5-bis(methanesulfon)-amidobenzofuran of formula (3) to Dronedarone, wherein the 2-butyl-5-bis(methanesulfon)-amidobenzofuran of formula (3) is prepared by the processes of the present invention.
(2S)-2-((PYRIMIDIN-4-YL)AMINO)-4-METHYLPENTANOIC ACID AMINOETHYLAMID DERIVATIVES AS IL-8 RECEPTOR MODULATORS FOR THE TREATMENT OF ATHEROSCLEROSIS AND RHEUMATOID ARTHRITIS
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Page 42, (2010/02/08)
The invention relates to compounds of the formula: (I); wherein R1 is a basic moiety having the structure -NH(CH2)2NR5R6, (Formula II) or (Formula II); wherein R5, R6 and R7 are independently selected from H, (1-6C)alkyl, (2-6C)alken
