O,a-Dichlorotoluene

Dichloro-I, 2,3,4-tetramethyl-CYCLOBUTENE, 46, 34 o,a-Dichlorotoluene, condensation with ethyl cyanoacetate, 48, 54 Dicyclohexylcarbodiimide in oxidation of cholane-24-ol with dimethyl sulfoxide and pyridinium trifluor-oacetate, 47, 25... 

Benzylidene chloride. See o,a-Dichlorotoluene Benzylidene glycerol 1,3-0-Benzylidene glycerol. See Benzaldehyde glyceryl acetal 2-Benzyl ideneheptanal. Seeo-Amylcinnamaldehyde 2-Benzylidene-heptanol 2-Benzylidene-1 -heptanol. See a-Amylcinnamyl alcohol 2-Benzylidene hexanal. Seea-Butylcinnamaldehyde 2-Benzylidene-octanal. Seea-Hexylcinnamaldehyde... 

Bengal lights, dk. green Dimercury dichloride bentonite major component Montmorillonite benzaldehyde mfg. o,a-Dichlorotoluene Toluene benzene derive, synthesis, substituted (Benzene) tricarbonylchromium benzene mfg. 

Ammonium acetate Aniline Benzanthrone Bromine Carmine (Coccus cacti) Carminic acid 2-Chlorophenol Crystal violet lactone Diaminodiphenic acid Di-n-amylamine Diazoaminobenzene o,a-Dichlorotoluene Dimethoxypropane 4-Dimethylaminoazobenzene-4-sulfonic acid, sodium salt p-Dimethylaminobenzaldehyde 4-Dimethylaminobenzene 6-Dimethylaminophenylazobenzothiazole N,N-Dimethylaniline Dinitrotoluene 2,4-Dinitrotoluene Direct blue 8 Direct blue 10 Direct blue 25 Direct blue 218 Direct orange 6 Direct violet 32 Disperse blue 7 Disperse red 60 Dodecene-1 N-(p-Ethoxycarbonylphenyl)-N -ethyl-N -phenylformamidine Ethylene cyanohydrin Ethylene thiourea... 

Reaction of 1 with benzaldehyde and zinc chloride gave a diastereomeric mixture (6) of R- and 5-2,3-O-benzylidene derivatives (4a and 4b). The former (4a) would be identical to the acetal described by Zinner et al. (3) as 2,4-O-benzylidene-D-ribono-1,5-lactone. This structure was further established as 4a, by chemical and physical studies of the product obtained on reaction of 1 with benzaldehyde dimethyl acetal (7). The 2,3-O-benzylidene derivative, obtained by Garegg et al. (8) on reaction of 1 with a,a-dichlorotoluene in pyridine, has the same properties as compound 4a, which would indicate the -configuration for the acetal carbon. 

Beilstein Handbook Reference) AI3-14885 Benzene, 1-chloro-2-(chloromethyl)- BRN 0471700 1-Chloro-2-(chloromethyl)benzene 2-Chlorobenzyl chloride a,2-Dichlorotoluene a,o-Dichlorotoluene EINECS 210-258-8 NSC 8446 o-Chlorobenzyl chloride Ortho-a-dichlorotoluene Toluene, a,o-dichloro- Toluene, o,a-dichloro-. Liquid mp = -17° bp = 217° d° = 1.2699 Am = 271, 278 nm (s = 339, 263, MeOH) insoluble in H2O, slightly soluble in EtOH, CCU, soluble in CS2, very soluble in Et20, CeHe, AcOH,... 

Benzene, o-dichloro-. See o-Dichlorobenzene Benzene, 2,4-dichloro-1,3-dimethyl-5-hydroxy-. See Dichloro-m-xylenol Benzene, 1,4-dichloro-2-isocyanato-. See 2,5-Dichlorophenyl isocyanate Benzene, (dichloromethyl)-. See a,a-Dichlorotoluene... 

Ethyl oxalate Isocaproic acid a,a-Dichlorotoluene Benzoic acid a-Bromotoluene m-Bromotoluene o-Bromotoluene p-Bromotoluene a-Chloro toluene... 

Reactions of the Aromatic Ring. Ring chlorination of o-chlorotoluene yields a mixture of all four possible dichlorotoluenes, the 2,3-, 2,4-, 2,5-, and 2,6-isomers as shown in equation 1 (14). 

Method A solution of p-methoxyphenyltellurium trichloride (0.34 g, 1.0 mmol) in benzene (200 mL) is irradiated with a high-pressure mercury lamp in the presence of atmospheric oxygen for 1 h (formation of a black precipitate). The mixture is filtered and the filtrate is washed with brine and then dried (MgS04). GLC analysis shows the presence of p-chloromethoxybenzene [0.14 g (70%)] (and minor amounts of o,p-dichloro-methoxy-benzene and p-methoxybiphenyl) using p-chlorotoluene, 2,4-dichlorotoluene and p-methylbiphenyl as the internal standard, respectively. 

The use of n.m.r. and chemical reactions in the determination of stereochemical assignments for reduced cyclopropapyrans (8) has been extended to the 7-phenyl derivative, which was synthesized from 5,6-dihydro-27/-pyran and a,o -dichlorotoluene. Reduction of the chloro-compound (8) with IiAlH4 gave the e c o-isomer (9), which was isomerized to the exo-form... 

Chlorotoluene. is a starting material in the production of side-chain-chlorinated derivatives, which are precursors for dyes, pharmaceuticals, optical brighteners, and fungicides. It is also used to produce dichlorotoluenes by chlorination, 3-chlorotoluene by isomerization and o-chlorobenzonitrile by ammonoxidation. 

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