Benzene l-isopropyl-4-methyl

CgHu, Cyclooctene, iridium complex, 21 102 C10H4, Benzene, l-isopropyl-4-methyl-, ruthenium complex, 21 75 CioHit, 1,3-Cyclopentadiene, 1,2,3,4,5-penta-methyl-, 21 181... 

Benzene, l-isopropyl-4-methyl 8.2 Ethene, tetrachloro (perchloroethylene) 9.3... 

Butene + Benzene —> l-isopropyl,4-methyl Benzene (p-Cymene)... 

C10H14 C10H20 l-isopropyl-4-methyl-benzene l-isopropyl-4-methyl-cyclohexane 99-87-6 99-82-1 ... 

A. DI-/u-CHLORO-BIS[CHLORO(i76-l-ISOPROPYL-4-METHYL-BENZENE)RUTHENIUM(II) ]... 

A soln. of l-(3,4-dichlorophenyl)-3-isopropyl-3-(2-propynyl)urea and PGI5 in benzene refluxed 4 hrs. 2-chloro-3- (3,4-dichlorophenyl) -l-isopropyM-methyl-imidazolium chloride (Y 76.8-95%) dissolved in water and made slightly alkaline with 20%-NaOH 3-(3,4-dichlorophenyl)-l-isopropyl-4-methyl-2-imid-azolone (Y 91%).—Otherwise inaccessible 1,3-disubst. 2-imidazolones can easily be prepared by this method. F. e. s. P. J. Stoffel and A. J. Speziale, J. Org. Ghem. 27, 3079 (1962) cf. J. Org. Ghem. 28, 2917 (1963). 

C10H13Br 2-bromo-l-isopropyl-4-methyl-benzene 4478-10-8 RI Temp/C Lambda/nm Ref. 

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... 

A.59) Benzene, l-methyl-4-(l-methylethyl)-, p-cymene, l-isopropyl-4-methylbenzene, p-isopropyltoluene, 2-p-tolylpropane, p-methylcumene (99-87-6J FEMA 2356... 

Methyl-4,5-dihydro-(3//)-benzo[e]phosphindole was chromatographed on alumina (neutral) with benzene as eluent <82PS(12)161> Florisil with pentane as eluent was used for l-isopropyl-2-methyl-5-phenylphosphole, and also for a phosphindole <71JA6205>. 

Methyl-4(5)-nitroimidazole added to a soln. of Na in methanol, evaporated to dryness, and the resulting Na-salt refluxed 2 hrs. in a mixture of isopropyl iodide and dimethylformamide -> 12 g. l-isopropyl-2-methyl-4-nitroimidazole. - The 5-nitro isomer was obtained by refluxing the above startg. m. with 2-propyl tosylate in benzene. M. Hoffer et al., J. Med. Chem. 14, 993 (1971). 

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... 

Pyrethroid Esters of Benzene Acetate. These insecticides have more extensive structural optimization in both acid and alcohol moieties. Fenvalerate [51630-58-1]y 0t-cyano-(3-phenoxyphenyl)methyl (+)-(2R,T)-a-isopropyl-4-chlorophenylacetate (24) (d 1.17, vp 1.4 J,Pa at 25°C), a mixture of four isomers, is soluble in water to 0.3 mg/L The rat oral LD ( is 450 mg/kg. Esfenvalerate [66230-04-4] is the (+)-2-(3, 3)-isomer (mp 59°C). The rat LD5Qs are 75, 458 (oral), and the rabbit dermal LD50 is 2000 mg/kg. These pyrethroids are widely used general-purpose insecticides for field, vegetable, and fruit crops. 

The following alkoxypyrazines have been prepared from the corresponding dichloropyrazines and alkoxide ions 2,3-dimethoxy-5,6-dimethyl(and diphenyl) (797) 2,3-dibenzyloxy (sodium benzyl oxide in benzyl alcohol at reflux for 24 hours (883)] [but 23-dichloropyrazine with sodium hydride and benzyl alcohol in xylene gave l,4-dibenzyl-2,3-dioxo-l,2,3,4-tetrahydropyrazine)(988)] 2-chloro-5-methoxy (838) 2,5-diethoxy-3,6-dimethyl (872) 2methanolic sodium methoxide refluxed for 2 h) 2,5-dimethoxy-3-phenyl (817) 2-chloro-5-methoxy(and ethoxy)-3,6-diphenyl (817) 2,5-dimethoxy-3,6-dimethyl (and diisopropyl) (844) 2,5-dimethoxy-3-isopropyl-6-methyl (methanolic potassium methoxide at reflux for 6 days) (844) 2(5)-s-butyl-3-chloro-6-ethoxy-5(2)-isobutyl (93) 2-chloro-6-methoxy (838, 883) 2,6-dimethoxy (reflux for 8h) (832) 2,6-diethoxy (reflux for 14 h) (883) 2-benzyloxy-6-chloro (1 equiv. of sodium hydride and benzyl alcohol in benzene at reflux) (832) 2,6-dibenzyloxy (5 equiv. of sodium benzyloxide in benzene at reflux gave 70%) (832) and 3,5-dimethoxy-2-methyl (535). 

Chloro 3-hydfoxy-1-methyl 4-isopropyl-henzene -6-diazoniumchloride, HO.CgH.Cl(CHg) [CH -(CH3) j. N(tN),Cl mw 24 9.12, N 10.99% col ndls (from eth-alc), mp explodes on heating was prepd by treating a cold ale soln of 2-chloro-6 -amino- 3 hydroxy-l-methyi-4-isopropyl benzene with nitrous acid(Refs 1 2)... 

CO, CH4, CO2, acetone, ketene. ethene. propene. 1-butene, benzene, toluene, xylene, cydopentene, methyl ethyl ketone, diethyl ketone, methyl-n-propyl ketone, di-n-propyl ketone, methyl vinyl ketone, methyl Isopropenyl ketone, methyl isopropyl ketone, ethyl vinyl ketone, trace amounts of methyl-n-bulyl ketone, cyclopentanone, cydohexanone. acrolein, ethanal. butanal. chain fragments, some monomer CO. CH4, COj, ketene, 1-butene, propene, acetone, methyl ethyl ketone, methyl n-propyl ketone, 1,4-cyclohexadiene. toluene, l-methy. l.3-cydohexadlene, 2-hexanone, cydopentene, 1-methyl cydopentene. mesityl oxide, xylenes, benzene, ethene, cyclopentanone, 1.3-cyclopentad iene, diethyl ketone, short chain fragments, traces of monomer CO, CH4, COi, ketene, 1-butene, propene, acetone, methyl ethyl ketone, methyl isopropyl ketone, methyl-n-propyl ketone, diethyl ketone, methyl propenyl ketone, 3-hexanone. toluene, 2-hexanone. 1,3-cydopentadiene, cyclopentanone, 2-melhylcydopenlanone, mesityl oxide, xylenes, benzene, propionaldehyde, acrolein, acetaldehyde ethene, short chain fragments, traces of monomer CO, COj, H2O, CH4. acetone, ketene, ethene, propylene, 1-butene, methyl vinyl ketone, benzene, acrylic add, toluene, xylene, short chain fragments such as dimer to octamer with unsaturated and anhydride functionalities... 

A soln. of startg. 4-aryl-1,4-dihydropyridine in DMF treated with NaCN at 60°, and stirred for 20 min - 3-methyl 5-(isopropyl) 2-(fluoromethyl)-6-methylpyridine-3,5-dicarboxylate and l-chloro-4-fluoro-2-(trifluoromethyl)benzene (Y 72%). This is the first generally applicable fragmentation-type aromatization of a Hantzsch ester under mild, basic, non-oxidative conditions. F.e.s. T. Mclnally, A.C. Tinker, J. Chem. Soc. Perkin Trans. I 1988, 1837-44. 

C12H15Br l-bromo-2-isopropyl-5-methyl-4-vinyl-benzene 38338-67-9... 

C12H15Br l-bromo-5-isopropyl-2-methyl-4-vinyl-benzene 38338-68-0... 

Chemical Designations - Synonyms Cymol p-Isopropyltoluene Isopropyltoluol l-Methyl-4-Isopropyl-benzene Methyl Propyl Benzene Chemical Formula p-CH3C4H,CH(CH3)2. 

The cymidiu sulphouic acid is then diazotised in the usual manner by treating with sodium nitrite in acid solution and the diazo body reduced with alkaline tin chloride solution, or with formic acid and powdered copper, or with other relatively gentle reducing agents. The 3 or 5 cymidin sulphonic acid gives by the above process one and the same cymene sulphonic acid, viz., l-methyl-3-sulphonic-4-isopropyl benzene. 

The sodium salt of the cymene sulphonic acid is then fused with sodium hydroxide in the usual manner, and the hydroxyl group substituted for the sulphonic group. This gives l-methyl-3-hydroxy-4-isopropyl-benzene or thymol. 

Alkyl ethynyltellurides from dialkylditellurides and pressurized acetylene in the presence of electrophilic reagents (typical procedure) To a mixture of di-isopropyl ditellurides (4.5 g, 13 mmol), powdered KOH (20 g, 303 mmol), methyl iodide (2 g, 14 mmol), dibenzo-18-crown-6 (0.2 g) and benzene (50 mL) was heated (40-50°C) in a 1 L rotating autoclave under acetylene pressure (14 atm) for 5 h. After addition of water the mixture was extracted with benzene, the organic layer was separated and dried over KjCOj. After evaporation of benzene the residue was diluted with ether and precipitated dibenzo-18-crown-6 was fdtered off. After evaporation of ether the residue was distilled in vacuo giving the product (2.3 g, 96% yield). 

The photochemical reactions of l,l,4,4-tetramethyl-2,3-dioxotetralin (14) have been studied in methanol, isopropyl alcohol, cyclohexane, toluene, -butyraldehyde, methyl formate, acetic acid, dioxane, and benzene.75 In isopropyl alcohol the reduced ketone (15) is formed almost exclusively, while... 

Neat isopropyl methylphosphinate (1) reacts exothermically on dropwise addition to methyl triflate to form a phosphonium salt (2), NMR 6 +73.4 (downfield from external H,P0.) J = 656 Hz, which yields isopropyl methyl methylphosphonite (3), when slowly added to a cold benzene solution containing excess tri-ethylamine (TEA). On warming to room temperature, the product was obtained as a benzene/TEA solution, which separated from a heavier liquid layer that consisted mainly of amine salt byproducts in benzene/TEA. When (R)-(+)-l (25% enantiomorphic excess) was used, a solution of (R)-(+)-3 (5 +176.6) was obtained in 60% yield, 90 mole-% pure with respect to its organophosphorus content. 2(Pie specific rotation of this product was calculated to be [a]D + 67.7 (c 2.6, benzene), if optically pure (+)-l starting material... 

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