16789-84-7Relevant articles and documents
Bromination of deactivated aromatics: A simple and efficient method
Rajesh,Somasundaram,Saiganesh,Balasubramanian
, p. 5867 - 5869 (2007)
(Chemical Equation Presented) Highly deactivated aromatic compounds were smoothly monobrominated by treatment with N-bromosuccinimide (NBS) in concentrated H2SO4 medium affording the corresponding bromo derivatives in good yields. Mild reaction conditions and simple workup provides a practical and commercially viable route for the synthesis of bromo compounds of deactivated aromatics.
Macrocyclic derivative of pyrazole[3,4-d]pyrimidin-3-one and pharmaceutical composition and application thereof
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Paragraph 0332; 0547; 0548; 0549, (2018/10/19)
The present invention relates to a macrocyclic derivative of pyrazole[3,4-d]pyrimidin-3-one as shown in the formula (I) and/or a pharmaceutically acceptable salt thereof, and a composition of a compound of the formula (I) and/or a pharmaceutically acceptable salt thereof, a preparation method thereof, application thereof as a Wee1 inhibitor and application thereof as a sensitizer for cancer chemotherapy or radiotherapy. The macrocyclic derivative of pyrazole[3,4-d]pyrimidin-3-one can effectively inhibit Wee1 and related signaling pathways, and has good cancer treatment and/or relieving effect.The formula is shown in the description.
Diversely halogenated spiropyrans - Useful synthetic building blocks for a versatile class of molecular switches
Schulz-Senft, Mathias,Gates, Paul J.,S?nnichsen, Frank D.,Staubitz, Anne
, p. 292 - 301 (2016/09/09)
Spiropyrans are dyes that can be reversibly switched to a highly colored merocyanine form by a number of stimuli such as light, mechanical force or temperature. To make use of these molecules, there is a requirement to functionalize them appropriately. Herein we report a library of spiropyrans bearing two (pseudo) halide functional groups on either half of the molecule. Such halide substituents are valuable, because they themselves may be used as reactive sites in cross-coupling reactions, for example. Different combinations of halides, for which different reactivities in cross-coupling reactions may be expected, will facilitate selective consecutive cross-coupling reactions and condensations. Data concerning the UV/vis characteristics, the photostationary equilibria of the materials as well as the half-life of the merocyanine forms in solution are presented.
CARBOXY SUBSTITUTED (HETERO) AROMATIC RING DERIVATIVES AND PREPARATION METHOD AND USES THEREOF
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Page/Page column 115, (2017/03/21)
Carboxy-substituted (hetero)aryl derivatives, pharmaceutical compositions comprising these compounds, and methods of preparing such compounds and compositions are provided. The compounds or compositions are useful in inhibiting xanthine oxidase and urate anion transporter 1, and also can be used in the treatment or prevention of diseases associated with high blood uric acid level in mammals, especially humans.
On the bromination of aromatics, alkenes and alkynes using alkylammonium bromide: Towards the mimic of bromoperoxidases reactivity
Mendoza, Fabian,Ruíz-Guerrero, Rosario,Hernández-Fuentes, Carlos,Molina, Paulina,Norzagaray-Campos, Mariano,Reguera, Edilso
supporting information, p. 5644 - 5648 (2016/11/28)
This article describes an efficient method of bromination of organic substrates including aromatics, alkenes and alkynes with NH4VO3as a catalyst and H2O2as an oxidant agent using a non-toxic and easy-to-handle source of bromine, tetrabutylammonium bromide. The process was developed under mild reaction conditions and is an innovation from reported methods in aspects such as: i) short reaction times, ii) the ability to work at room temperature, iii) regioselectivity and good yields.
A simple route to polysubstituted indoles exploiting azide induced furan ring opening
Abaev, Vladimir T.,Plieva, Anastasiya T.,Chalikidi, Petrakis N.,Uchuskin, Maxim G.,Trushkov, Igor V.,Butin, Alexander V.
supporting information, p. 4150 - 4153 (2014/09/30)
A straightforward, efficient indole synthesis based on thermolysis of 2-(2-azidobenzyl)furans with attack of the formed nitrene moiety onto the ipso position of furan ring has been developed. The cyclization is accompanied by furan ring opening and affords indoles with a 2-acylvinyl substituent suitable for further modifications.
Enantioselective aerobic oxidation of α-hydroxy-ketones catalyzed by oxidovanadium(V) methoxides bearing chiral, N-salicylidene- tert -butylglycinates
Chen, Chien-Tien,Kao, Jun-Qi,Salunke, Santosh B.,Lin, Ya-Hui
supporting information; experimental part, p. 26 - 29 (2011/03/22)
Chiral oxidovanadium(V) methoxides prepared from 3,5-disubstituted-N- salicylidene-l-tert-butylglycines and vanadyl sulfate in air-saturated MeOH serve as highly enantioselective catalysts for asymmetric aerobic oxidations and kinetic resolution of alkyl, aryl, and heteroaryl α-hydroxy-ketones with differed α-substituents at ambient temperature in toluene or TBME (tert-butyl methyl ether). The best scenarios involve the use of complexes which bear the tridendate templates derived from 3,5-diphenyl- or 3-o-biphenyl-5-nitro-salicyaldehyde. The kinetic resolution selectivities of the aerobic oxidation process are in the range of 12 to >1000 based on the selectivity factors (krel).
Tetrameric DABCO-bromine: An efficient and versatile reagent for bromination of various organic compounds
Heravi, Majid M.,Derikvand, Fatemeh,Ghassemzadeh, Mitra
, p. 125 - 128 (2007/10/03)
Tetrameric DABCO-bromine is a powerful brominating agent but shows reasonable selectivity with certain substrates. The selective bromination for activated aromatic compounds and alkenes is reported. Synthesis of α-bromo ketones and nitriles has also been achieved by using this reagent and the results are also reported. All products reported were obtained in good to excellent yields.
Regioselective and high-yielding bromination of aromatic compounds using hexamethylenetetramine-bromine
Heravi, Majid M.,Abdolhosseini, Nafiseh,Oskooie, Hossein A.
, p. 8959 - 8963 (2007/10/03)
A regioselective and highly efficient method for bromination of aromatic compounds in the presence of a stoichiometric amount of hexamethylenetetramine- bromine (HMTAB) as an efficient reagent in dichloromethane is reported. The selectivity depends on the temperature and nature of the substituent on the substrate. The reactivity of this reagent was increased by supporting it to silica gel for bromination of less activated compounds.
Thermo- and Photochromic Dyes: Spiro(indolinebenzopyrans) 2. - Detailed Assignment of the 1H NMR Spectra and Structural Aspects of the Closed Form of 1,3,3-Trimethylspiro(indoline-2,2'-benzopyrans)
Keum, Sam-Rok,Lee, Ki-Bong,Kazmaier, Peter M.,Manderville, Richard A.,Buncel, Erwin
, p. 1128 - 1131 (2007/10/02)
The proton NMR assignments for a series of 12 thermo- and photochromic 1,3,3-trimethylspiro(indoline-2,2'-benzopyrans) dyes is reported.All of the protons in the dye molecule were assigned through a combination of homonuclear decoupling experiments and correlation spectroscopy.The relative stereochemistry of the indolino gem-dimethyl groups was assigned so that, for the S-epimer, the pro-R methyl was found to resonate at 1.24 ppm while the pro-S methyl appeared at 1.37 ppm for compound 1. KEY WORDS: Thermo- and photochromic dyes, Spiro(indoline-2,2'-benzopyrans), 1H NMR assignments