In the title compound, C21H16N2O2, the meth-oxy-benzene ring is almost perpendicular to the mean plane of the naphthalene ring system, making a dihedral angle of 83.62 (5)°. The 4H-pyran ring fused with the naphthalene ring system is almost planar [maximum deviation = 0.033 (1) Å]. In the crystal, m …

For the crystal structure of the isomer of the title compound, 3-amino-1-phenyl-1H-benzo[f]chromene-2-carbonitrile, see: Akkurt et al. (2013). Experimental top. To a solution of 1-naphthol (144 mg; 1 mmol) in 10 ml absolute ethanol, an equimolar amount of benzylidene-malononitrile (154 mg; 1 mmol) was added with constant stirring. The …

The structural geometric parameters of the title compound are normal and are consistent with those of the isomer compound 3-amino-1-phenyl-1H-benzo[f]chromene-2-carbonitrile (Akkurt et al., 2013). Both isomers crystallizes in the same monoclinic space group P 2 1 and their unit-cell parameters are almost equal.

Thermolysis of 2-[(dimethylamino)methyl]phenols by heating in DMF under reflux in the presence of malononitrile and DBU with the reagent ratio of 2:1:1 leads to the formation of 5а-amino-5аН,11Н-chromeno[2,3-b]chromene-11а(12H)-carbonitriles 6 in 37–49% yields. 8a It is a cascade reaction and includes the following main steps: thermal generation of …

In the title compound, C21H15BrN2O2, the 14 non-H atoms of the 4H-benzo[h]chromene fused-ring system are approximately coplanar (r.m.s. deviation = 0.129 Å). Within this system, the 4H-pyran ring adopts a flattened half-chair conformation with the methine C atom lying 0.281 (4) Å above the plane of the remaining atoms (r.m.s. deviation = 0. ...

2-AMINO-4-PHENYL-4H-BENZO(H)CHROMENE-3-CARBONITRILE AldrichCPR; CAS Number: 11; Linear Formula: C20H14N2O; find -R424196 MSDS, related peer-reviewed papers, technical documents, similar products & more at Sigma-Aldrich ... 3-AMINO-1-(3-HYDROXY-PHENYL)-1H-BENZO(F)CHROMENE-2-CARBONITRILE. …

Considering low systemic toxicity and diverse biological activities of benzochromene derivatives, we have used the 1H-benzo[f]chromene scaffold with methoxy substituent at the 8-position and different halogen substituents on the pendant phenyl group at the 1-position of 1H-benzo[f]chromene moiety to create various compounds.The cytotoxic …

2 Simulation du procédé de broyage 2.1 Une méthode discrète avec contribution fluide Une méthode de simulation de problèmes d'interactions fluide vs. particules a été …

Broyage par impact de billes. Oscillations verticales de 500 à 2000 oscill/min. Capacité : 4 microplaques de 96 puits ou 16 tubes 50 mL. Broyage rapide en moins de 3 min. …

The applicability of the LCMNP material was evaluated in a three-component coupling reaction between a nucleophile, salicylaldehyde and malononitrile as the catalyst for one-pot synthesis of 2-amino-4H-chromene-3-carbonitrile derivatives. The catalyst system showed high catalytic activity in this process and target products were obtained in ...

In continuation of our effort to identify new 1H-benzo[f ]chromene and 4Hbenzo[h]chromene derivatives and confirm their structures by X-ray analysis[18][19] [20] [21][22][23], we have now ...

2.Becauseof l'exploitation minière et de broyage chantier de la taille du produit final d'enquêter afin de s'assurer que l'usine de test pendant au représentant mine. 3. Pour le …

2-Amino-4-phenyl-4H-benzo[h]chromene-3-carbonitrile | C20H14N2O | CID 3121293 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more.

Le broyage du produit s'effectue plus exactement lorsque la roche entre en contact direct avec les percuteurs et les écrans de chocs. A la fin du cycle à la sortie du broyeur, les …

Le broyage peut mettre en jeu différents mécanismes : la compression (écrasement), l'impact (percussion), la coupure (cisaillement) et l'attrition (frottement) qui impacte les …

The asymmetric unit of the title crystal structure is shown in the figure. Tables 1 and 2 contain details of the measurement method and a list of the atoms including atomic coordinates and displacement parameters.

In the title compound, C20H14N2O, the plane of the phenyl ring is almost normal to that of the naphthalene ring system, forming a dihedral angle of 83.15 (8)°.

The target compound 3-amino-1-(2,5-d ichlorophenyl)-8-methoxy-1H-benzo[f]- chromene-2-carbonitrile (4) was synthesized via a reaction of 6-methoxynaphthalen-2-ol (1), 2,5-dichlorobenzaldehyde (2 ...

de l'outil sur la particule. Broyage par impact. entre particules. Broyage par écrasement avec l'outil. Broyage par attrition avec l'outil. Broyage par cisaillement avec l'outil. Les …

In the title compound, C 20 H 14 N 2 O, the plane of the phenyl ring is almost normal to that of the naphthalene ring system, forming a dihedral angle of 83.15 (8)°. The 4H-pyran ring fused with the naphthalene ring system has a flattened boat conformation.In the crystal, mol­ecules are linked by pairs of N—H⋯N hydrogen bonds, forming inversion dimers …

Abstract. A convenient and efficient one-pot method for the synthesis of 2-amino-tetrahydro-4H-chromene and 2-amino-4H-benzo[h]-chromene derivatives has been developed using a catalytic amount of amino-functionalized MCM-41 in aqueous medium.This efficient technique has the advantages of giving 4H-tetrahydro-chromene …

Enantioselective synthesis of 3‐amino‐1‐aryl‐1 H ‐benzo[ f ]chromene‐2‐carbonitrile derivatives by Fe 3 O 4 @PS‐arginine as an efficient chiral magnetic nanocatalyst Article Full ...

Reactions performed in the presence of nano-CuFe 2 O 4 as catalyst and water as solvent afforded the corresponding 2-amino-4H-chromene-4-carboxylates and 2-amino-5H-pyrano[3,2-c]chromene-4-carboxylates in presentable yields (Scheme 6). The nanocatalyst can be reused for six cycles without any significant reduction in product yield.

5. Applications du broyage aux industries agroalimentaires. Dans les industries agricoles et alimentaires, le broyage est une opération unitaire très répandue. Tous les types de …

A novel chiral magnetic nanocatalyst was prepared by the surface modification of Fe 3 O 4 magnetic nanoparticles (MNPs) with a chloropropylsilane and further by arginine to form Fe 3 O 4 @propylsilan-arginine (Fe 3 O 4 @PS-Arg). After the structural confirmation of Fe 3 O 4 @PS-Arg synthesized MNPs by Fourier transform-infrared, X-ray diffraction, field …

technology for the synthesis of 2-amino-4H-benzo[b]pyrans using amine-functionalized silica magnetic nanoparticles (NH 2 @SiO 2 @Fe 3 O 4). In the last few years, tetrahydrobenzo- ...,17 ethyl-2-(2-amino-6-bromo-3-cyano-4H-chromene-4-yl)-2-cyanoacetate (C),10 2-amino-7-(dimethylamino)-4-(4-(dimethylamino)naphthalene-

Introduction. Bicyclic oxygen heterocycles-containing a benzene fusion ring at a 5,6-positioned 4H-pyran ring system designated as 4H-chromene (4H-ch) has attracted considerable attention as an important structural motif for the discovery of new drug candidates (El-Gaby et al., 2000).Four common structure motifs are formed, which …

dustrie de transformation st . 1.8. Méthodes de la minéralurgie. Étapes. valorisations d'un minerai1.8.1.1. Préparati. La préparation mécanique d'un minerai est la libération des …

An eco-friendly and efficient straightforward method has been developed for the synthesis of ethyl 3-amino-1-aryl-1H-benzo[f]chromene-2-carboxylate derivatives via 1,4-diazabicyclo[2.2.2]octane (DABCO)-catalysed cyclisation of β-naphthol and 3-aryl-2-cyanoacrylates using water as a green solvent. All products precipitated from the …

Et donc, cette technique de synthèse rapide peut être considérée comme une méthode prometteuse pour la préparation de nanoparticules sphériques d'argent de haute pureté …

Some 3-amino-1aryl-1H-benzo[f]chromene-2-carbonitrile derivatives exhibit c-Src kinase inhibitory and antiproliferative activities [22] and show a high potency for the inhibition of hAChE [23 ...

The synthesis of novel 7-(4-halophenyl)-8,9-dihydro-7H-12-oxa-9,11-diaza-benzo[a]anthracene derivatives has been reported. The key intermediate 3-amino-9-chloro-1-(4-halophenyl)-1H-benzo[h]chromene-2-carbonitrile (3) was obtained by treating 4-halobenzylidenmalononitriles (1a-c) and ethyl 4-halobenzylidenmalonates (1d-f) with 4 …