Benzene Y

Isopropylbenzene is prepared by the Friedel-Crafts alkylation of benzene y using isopropyl chloride and aluminum chloride (Section 12 6) j... 

Benzenediol, see Hydroquinone p-Benzenediol, see Hydroquinone Benzeneformic acid, see Benzoic acid Benzene hexachloride, see Lindane Benzene hexachloride-a-isomer, see a-BHC Benzene-crs-hexachloride, see p-BHC Benzene-y-hexachloride, see Lindane a-Benzene hexachloride, see a-BHC p-Benzene hexachloride, see p-BHC 6-Benzene hexachloride, see 8-BHC y-Benzene hexachloride, see Lindane frans-a-Benzene hexachloride, see p-BHC Benzene hexahydride, see Cyclohexane Benzene methanoic acid, see Benzoic acid Benzene methanol, see Benzyl alcohol Benzene tetrahydride, see Cyclohexene Benzenol, see Phenol... 

Reactivities of n-Bu (sp3 carbon-centered radical) and Ph (sp2 carbon-centered radical) to benzene, y-picoline, protonated y-picoline, protonated benzothiazole are shown in Table 5.1. As can be seen here, the reactivity is greatly increased in both radicals, as the electron-density of aromatics is decreased. Therefore, the reactivity of heteroatomatic bases such as y-picoline and benzothiazole, can be increased by their... 

Equations (10-2a) and (10-3a), with constant group partition factors Rm re widely applicable in partition chromatography (both liquid-liquid and gas-liquid) but only occasionally reliable in adsorption chromatography. A major reason for this difference between partition and adsorption systems is the fluidity of solutions versus the rigidity of solid surfaces. This is illustrated in Fig. 10-2 for the hypothetical compounds X-benzene, Y-benzene, and /)-X,Y-benzene. In solution (a) solvent molecules S are free to adjust their relative positions for optimum interaction with X or Y, regardless of the molecule into which X or Y is substituted. 

Smith and his collaborators prepared S-diazomethyl-1,2,3-triazoles (Eq. 19) and studied their carbene chemistry (Eq. 20). Results with other monosubstituted benzenes (Y = i-Pro, NO2, NH2 and NMe2) did not, for various reasons, contribute to this study. For example isopropoxybenzene... 

Azoxy compounds. Nitrobenzene and NaBH4 refluxed 1 hr. in pyridine azoxy-benzene. Y 91%. — Depending on the Hammett sigma constant (s. H. H. Jaffe, Chem. Rev. 53, 191 (1953)) of substituents, azoxy, azo, or hydrazo compounds may result. F. e. s. G. Otani, Y. Kikugawa, and S. Yamada, Chem. Pharm. Bull. 16, 1840 (1968). 

A soln. of peroxybenzoic acid in chloroform added slowly at room temp, to a stirred soln. of 2,6-difluoroaniline in the same solvent, and the product isolated when iodometric titration shows completion of the reaction 2,6-difluoronitroso-benzene. Y 85%. F. e. s. L. DiNunno, S. Florio, and P. E. Todesco, Soc. (C) 1970, 1433 with m-chloroperoxybenzoic acid s. Y. Yost and H. R. Gutmann, Soc. (C) 1970, 2497. 

Arylsulfonyl chlorides Benzene-y p-Toluene-. 2y4y6- Triisopropy l-benzene-y p-Acetyl-aminobenzene-sulfonyl chloride NHgSOgCl (sulfamoyl chloride)... 

Camphorsulfonic acid Benzene-y 2y4,6-Trinitro-benzene-y p-Toluene-y m-Xylene-y Naphthalene-sulfonic acid m-Benzenedisulfonic acid... 

Solid 2-isopropyl-1,3-benzodithiole 1,1,3,3-tetroxide added to a suspension of NaH in THF, treated with 2-phenylethyl bromide when H2 evolution had ceased, and heated at 80° for 24h - intermediate (Y 75%), in methanol at 50° treated in 3 portions over 3 h with Mg-turnings, and worked up after ca. 4 h - 4-methylpentyl-benzene (Y 72%). This is part of a multistep synthesis of hydrocarbons from two halide molecules with insertion of a methylene group. F.e., also 1,1-disulfonylcyclo-pentanes from 1,4-diiodides, s. E.P. Kundig, A.F. Cunningham, Jr., Tetrahedron 44, 6855-60 (1988). 

Trichloro-l-(4-chlorophenyl)ethyl acetate added to a mixture of Al-foil and a little PbBr2 in DMF, stirred at room temp, for 3.5 h, and quenched with aq. 5% HCl - 4-chloro-l-(2,2-dichloroethenyl)benzene. Y 84%. F.e., also from the corresponding alcohols in generally lower yield, s. H. Tanaka et al., J. Org. Chem. 54,444-50 (1989) with Zn/AcOH cf. G.M. Zhdankina et al., Izv. Akad. Nauk SSSR Ser. Khim. 1988, 2868-70. 

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