Benzene, l-bromo-4-chloro

Benzene, l-bromo-4-chloro-, 55, 51 Benzene, 4-bromo-l,2-dimethyl-, 55, 51 Benzene, (2-bromoethyl)- [ 103-63-9), 56,... 

Benzoic m-Toluic (Benzoic acid, 3-methyl-] p-Toluic [Benzoic acid, 4-methyl-J 3,5-Dimcthylbcnzoic [Benzoic acid, 3,5-dimcthyl-] p-Chlorobenzoic [Benzoic acid, 4-chloro-] p-Bromobenzoic [Benzoic acid, 4-bromo-J Phthalic [ 1,2-Bcnzcncdicarboxylic acid] Toluene [Benzene, methyl-] (78) m-Xylene [Benzene, 1,3-dimethyl-] (82) />-Xylene [Benzene, 1,4-dimethyl-] (74) Mesitylene [Benzene, 1,3,5-trimethyl-] (82) p-Chlorotolueno [Benzene, l-ehloro-4-methyl-] (94) p-Bromotolucnc [Benzene, l-bromo-4-methyl-] (94) o-Xylene [Benzene, 1,2-dimethyl-] (64)... 

Benzenamine [62-53-3], 122 Benzenamine, 2-methyl- [95-53-4], 86 Benzene, (2-bromoethyl)- [103-63-9], 82 Benzene, (bromomethyl)- [100-39-0], 78 Benzene, l-bromo-4-methyl- [106-38-7], 86 Benzene, chloro- [108-90-7], 86 Benzene, l-chloro-4-methyl- [106-43-4], 86 Benzene, l-(chloromethyl)4-methoxy-[824-94-2], 82... 

Benzene, bromo, 55, 51 Benzene, 1 -bromo4-chloro, 55, 51 Benzene, 4-bromo-l,2-dimethyl-, 55, 51 Benzene, l-bromo-4-fluoio-, 55, 51 Benzene, l-bromo-4-methoxy-, 55, 51 Benzene, 1-bromo-3-methyl-, 55, 51 Benzene, l-bromo-4-methyl- [Toluene, 4-bromo-], 55, 49... 

Benzaldehyde, 4-ethoxy-3-methoxy-, 56, 44 Benzaldehyde, 4-ethoxy-3-methoxy-, ethylene acetal, 56, 44 Benzaldehyde, 4-isopropyl-, 55,10 Benz[e ] anthracene, 58, 15, 16 BENZENAMINE, 4-bromo-Ar, V-dimcthyl-3-(tnfluoromethyl)-, 55, 20 Benzene, bromo-, 55,51 Benzene, 1 bromo-4-chloro-,55, 51 Benzene, 4-bromo-l, 2-dimethyl, 55, 51 Benzene, l-bromo-4-fluoro-, 55, 51 Benzene, 1 -bromo-4-methoxy-, 55,51 Benzene, l-bromo-3-methyl-, 55, 51 Benzene, 4-(cr/-buty 1-1-ethyl, 55, 10 Benzene, chemical hazard warning, 58, 168 Benzene, chloro-,56, 86 Benzene, l-ethyl-4-isopropyl-, 55, 10... 

Double bridged self-assembly occurs in l-chloro-4,5-dimethyl-4,5-didehydro-2-thiastibolane, 169, and l-bromo-4,5-diphenyl-4,5-didehydro-2-thiastibolane, 170, to form dimeric molecules in the solid state. In benzene solution the dimers dissociate into monomers [429]. 

The reactivities of 4- and 2-halo-l-nitronaphthalenes can usefully be compared with the behavior of azine analogs to aid in delineating any specific effects of the naphthalene 7r-electron system on nucleophilic substitution. With hydroxide ion (75°) as nucleophile (Table XII, lines 1 and 8), the 4-chloro compound reacts four times as fast as the 2-isomer, which has the higher and, with ethoxide ion (65°) (Table XII, lines 2 and 11), it reacts about 10 times as fast. With piperidine (Table XII, lines 5 and 17) the reactivity relation at 80° is reversed, the 2-bromo derivative reacts about 10 times as rapidly as the 4-isomer, presumably due to hydrogen bonding or to electrostatic attraction in the transition state, as postulated for benzene derivatives. 4-Chloro-l-nitronaphthalene reacts 6 times as fast with methanolic methoxide (60°) as does 4-chloroquinoline due to a considerably higher entropy of activation and in spite of a higher Ea (by 2 kcal). ... 

N,N -D ime thy 1-4,6-dinitro-m-pbenylenedia-mine, (02N)2CeH2(NH.CH3)2 yel ndls (from acet), mp >290° (dec) obtd with other products by warming 5-chloro-l,2,4-trinitro-benzene or 5 bromo- deriv with ca 4 moles of benzaldehyde-methylimide in MeOH (Refs 4 7)... 

Schlosser and co-workers have reported the shift of lithium in lithiated l-bromo-3-(tri-fluoromethyl)benzene 2,fa Quenching at — 100 C gives exclusively the product derived from 2, whereas after 2 hours at — 75 C, arene 2 is completely converted into less basic 3. A lithium-iodine exchange takes place in lithiated 2-chloro-3-iodo-6-(trifluoromethyl)pyridine 4, which at —85 C is totally converted into the less basic isomer 5.7 These rearrangements have been discussed in terms of a base-catalyzed halogen dance or halogen-shuffling mechanism. 

The extent of C-alkylation as a side reaction in etherification varies about 1% of allyl 2-allylphenyl ether is formed when phenol is used in the acetone and potassium carbonate method with allyl bromide with cinnamyl bromide or 7,7-dimethylallyl bromide the extent of C-alkylar tion is greater.16 A complicated mixture of C- and O-alkylation products results from the treatment of phenol with 4-bromo-2-hexene and 4-chloro-2-hexene. 9 4-Hexenylresordnol has been obtained in about 40% yield from the reaction of l-bromo-2-hexene, resorcinol, and potassium carbonate in boiling acetone.99 An appreciable amount of C-alkylation occurs when 2,6-dimethyIphenol is treated with allyl bromide and sodium ethoxide in ethanol.70 Since, in general, the ampunt of C-alkylation is greatly increased by carrying out the alkylation on the sodium salt of the phenol in benzene,16 this method is unsuitable for the preparar tion of allyl aryl ethers. 

However, neither copper(I) iodide nor photostimulation are absolutely necessary for the arylation of benzenetellurolate. Lithium benzenetellurolate and 1,2-bromoiodobenzene condensed in tetrahydrofuran at 20° to form 1,2-bis[phenyltelluro]benzene in 32% yield3. Sodium benzenetellurolate condensed similarly with l-chloro-2,4-dinitrobenzene at 20° in tetrahydrofuran/aqueous sodium hydroxide in the presence of a phase-transfer reagent. In this case 2,4-dinitrophenyl phenyl tellurium (m.p. 134°) was isolated in 30% yield4. Lithium methanetellurolate was arylated in tetrahydrofuran by iodobenzene5, 1,2-dibromobenzene, and l-bromo-2-methoxybenzene at 20°3. 

Suggest routes to the following compounds starting from benzene (a) l-chloro-4-nilrobenzene (b) l-bromo-3-nitrobenzene (c) 4-methoxybenzonitrile (d) fluorobenzene. 

Suggest a synthesis of the following compounds from the indicated starting material (a) 1,3,5-trichlorobenzene from aniline (b) 4-chlorobenzoic acid from aniline (c) 1-chloro-4-nitrobenzene from aniline (d) l-bromo-3-fluorobenzene from benzene (e) 3-chloroac-etanilide from benzene. 

The synthesis of 3-arm P2VP stars using l,3,5-tri(chloro-methyl)benzene, as well as the synthesis of 4-arm poly (tert-butylmethaciylate) (PtBuMA), poly(methyl methacrylate) (PMMA), and P2VP stars using l,2,4,5-tetra(bromomethyl)ben-zene, was reported (Scheme 9). Combined characterization results revealed that the use of bromo- instead of chloro-deiivatives and low temperatures leads to well-defined products. 

Write structures for the following compounds (a) l-bromo-3-methylbenzene, (b) 1-chloro-2-propyl-benzene, (c) 1,2,4,5-tetramethylbenzene. 

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