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Benzene dinitro

Required Sulphur, 4 2 g. sodium sulphide, 16 g. m-dinitro-benzene, to g. [Pg.169]

In 2-substituted dinitrothiophenes, phenylsulfone and p-nitro-phenoxy groups both react faster than the chloro group with pyridine, i.e., in a reverse order with respect to l-substituted-2,4-dinitro-benzenes, although with both substrates the factors involved are small. [Pg.350]

More recently, a double reductive ring closure of the dinitrodiphenylbenzene 139 with triethyl phosphite as the reducing agent has been reported to produce 3 in 59% yield (Scheme 18). The precursor 139 was prepared in excellent yield by Pd(0)-catalyzed coupHng of phenylboronic acid and 1,3-dibromo-4,6-dinitro-benzene (92JHC1237). [Pg.29]

E J. Fritz, Ibid 41 CA 72, 113380 (1970) (A detailed investigation was made of a nitration expln, including lab simulation of the event. The expln took place in production of dinitro-benzene in a batch nitrator. The problems of avoiding this sort of expln are detailed)... [Pg.268]

A cordeau detonant contg a compn prepd by thoroughly mixing NG or Nitrosugar with NC, mononitronaphthalene, dinitrobenzene, di- or tri-. nitrotoluene, K dichromate K femcyanide (FrP 237447 of 1894) (Ref 1, pp 158-159) 1894 Smokeless powders prepd by blending NC and Nitromannite, with or without dinitro-benzene (DNB), No 1 NC 60, Nitromannite 40 No 2 NC 60, Nitromannite 20, DNB 20 ... [Pg.349]

In relation to this last point, consider the reaction of 1-substituted 2,4-dinitro-benzenes with piperidines 15... [Pg.110]

The effect of temperature on retention time was investigated by Scott and Reese (3), who measured the retention volume of the solutes o-dinitro-benzene, 2-ethoxy naphthalene and p-chlorophenatole over a range of temperatures. The chromatographic conditions used are as follows,... [Pg.260]

Answer The nitro groups must be put in by nitration but the orientation is wrong. The methyl group cannot be disconnected as a Friedel-Crafts alkylation would never work on the available but extremely unreactive m-dinitro benzene. The solution (guideline 5) is to introduce a dummy amino group in such a position that it can activali... [Pg.29]

In order to characterize electron acceptor (basic type) properties of the samples, tetracyano ethylene compound, known to be easily ionizable in TCNE radical anion, was introduced at room temperature in the samples outgassed at different temperatures up to 800°C. No ESR signal was observed. As steric hindrance could preclude the experiment, smaller molecules as SO and p-dinitro benzene were also introduced. Then too, no ESR spectrum could be detected although the ESR technique is extraordinarly sensitive. It may thus be concluded that the ZSM-5 and ZSM-11 materials did not exhibit electron donor (basic) properties as detectable by ESR. [Pg.267]

Trinitrobenzene can be prepared by heating w-dinitro-benzene with nitric acid and sulfuric acid to 1200 1 by heating 2, 4, 6-trinitrotoluene with fuming nitric acid in a sealed tube at 180° for three hours 2 by heating 2, 4, 6-trinitrobenzoic acid or its sodium salt with water, alcohol, dilute sodium carbonate or other suitable solvent.3... [Pg.48]

Thirty-eight grams (0.1 mole) of bis-3,4-dichlorobenzoyl peroxide (Note 1) is added to a boiling solution of 3 g. of >re-dinitro-benzene in 800 ml. of dry reagent grade benzene contained in a 1-1. round-bottomed flask, and the resulting solution is boiled under reflux for 40 hours. The solvent is then distilled from the red solution until the residual volume is about 200 ml. (Note 2), and the mixture is allowed to cool. The 3,4-dichlorobenzoic acid... [Pg.23]

Synonyms AI3-15342 BRN 1912834 CCRIS 268 2,4-DNT 2,4-Dinitromethylbenzene Dinitrotoluol 2,4-Dinitrotoluol DNT 2,4-DNT EINECS 204-450-0 l-Methyl-2,4-dinitro-benzene NCI-C01865 NSC 7194 RCRA waste number U105 UN 2038. [Pg.511]

Irradiation accelerates the reactions of Scheme 4.1, and the substitution products are formed in 70-80% yields. Acceptors of radicals (e.g., di-tert-butylnitroxyl) or electrons (e.g., m-dinitro-benzene [DNB]) completely inhibit the snbstitution even if the acceptors are added to the reaction mixture in small amonnts. The mentioned snbstitution reactions do not take place when no cyano groups are present in the initial a-phenylsnlphonyl cumene. Hence, the cyano groups send the reaction via the ion-radical pathway. Like the nitro gronp, the cyano group promotes the formation of anion-radical, which originates on one-electron transfer from the thiophenolate or malonate ions to the substrate. [Pg.205]

There is no difference in the ability of photogeneration of radicals between systems that show photosubstitution and systems that do not, for example amines with 3,5-dinitroanisole and m-dinitro-benzene, respectively. This indicates that the formation of radicals from excited aromatic nitro-compounds in the presence of nucleophiles has no direct relation with the photosubstitution reaction. [Pg.256]

Benzaldehyde, 4-(l, l-dimethylethyl)-3-nitro Benzaldehyde, 4-(l, l-dimethylethyl)-3,5-dinitro Benzene, 2-(l,l-dimethylethyl)-4,5 dimethyl-1, 3-dinitro Benzoic acid, 4-(l,l-dimethylethyl)-2methyl 3,5-dinitro Benzene, l(l,l-dimethylethyl)-3,4-dimethyl-6- (lmethylethyl)-... [Pg.407]

Benzene, 2-ethyl-5-isooctyl-4-methoxy-l, 3-dinitro Benzene, l-isoheptyl-2-methoxy-4-methyl-3, 5-dinitro Benzene, l-isooctyl-2-methoxy-4-methyl-3, 5-dinitro Ethanone, 1- [3-(l,l-dimethylethyl)-2-methoxy-5-nitrophenyl Benzene, 1,3-dibromo-2-isopropyl-5-methoxy-4-nitro Benzene, 1,3-BIS- (1, l-dimethylethyl)-5-nitro Benzaldehyde, 5 (l,l-dimethylethyl)-2-methoxy-3-nitro Benzene, 1, 5-BIS- (1, l-dimethylethyl)-2 methoxy-4 methyl... [Pg.407]

Benzene, 1, 3-Bis (l,l-dimethylethyl)-5-methyl-2,4,6-trinitro Benzene, 3-(l,l-dimethylethyl)-l-fluoro-5-methyl-2, 4, 6-trinitro Benzene, 2-hexyl-4-methyl-l, 3, 5- trinitro Benzene, 2-methyM- (l-methylethyl)-l, 3, 5-trinitro Benzene, l-(l,l-dimethylethyl)-2-ethoxy-3, 5-dinitro Benzene, l-(l,l-dimethylethyl)-2-ethoxy-4 ethyl 3, 5-dinitro Benzene, l-(l,l-dimethylpropyl)-4 ethyl-2-methoxy- 3, 5-dinitro Benzene, 1,3-Bis (l,l-dimethylethyl)-4-methoxy-6-methyl-2,... [Pg.409]

N 21.94% pale yellow needles (from HAc), mp 220°, puffs off on strong heating sol in acetone, chlf, ligroin Et acetate. Prepd from 2-nitrophenylhydrazine 4-chloro-1,3-dinitro-benzene... [Pg.211]

Dinitro-2-diazopbenol. See Dinitrobenzenediazooxide or Diazodinitrophenol, Vol 2, p B 59-L.. This compd is also known as Diazol 2t6-Dinitro-4-diazopbenol. See 2,6-Dinitro-benzene-4-diazo-1-oxide, Vol 2, p B59-R... [Pg.66]

Bull(Fr) [33 33, 1175 St 11790905) 2,4-Dinitrodiphenylamine, (02N)2C6H3.NH.C6Hb red ndls (from benz), mp 157° sol in acet, chlf St hot ale can be prepd by interaction of 4-chloro-l,3 dinitro-benzene and aniline or by other methods (Refs 1-4)... [Pg.325]


See other pages where Benzene dinitro is mentioned: [Pg.236]    [Pg.172]    [Pg.176]    [Pg.168]    [Pg.386]    [Pg.526]    [Pg.530]    [Pg.575]    [Pg.6]    [Pg.716]    [Pg.2]    [Pg.575]    [Pg.198]    [Pg.120]    [Pg.143]    [Pg.99]    [Pg.847]    [Pg.76]    [Pg.77]    [Pg.86]    [Pg.49]    [Pg.325]    [Pg.439]    [Pg.526]   


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1 -Chloro-2,4-dinitro benzene, from

1-Methyl-2,4-dinitro-benzene

1.4- Dinitro-benzene calculation

Benzene, 2-chloro-1,3-dinitro

Benzene, 2-chloro-1,3-dinitro 1,2,3-trimethyl

Benzene, 2-chloro-1,3-dinitro ETHYNYL

Benzene, 2-chloro-1,3-dinitro Hexamethyl

Benzene, l-Chloro-2,4-dinitro

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