2.3- Dimethyl-2,3-diphenylbutane

TERPHENYL p-TERPHENYL TRIPHENYLPHOSPHINE TRlPHENYL PHOSPHATE N,N -DIPHENYL-p-PHENYLENEDIAMINE 2,3-DIMETHYL-2,3-DIPHENYLBUTANE DICUMYL PEROXIDE n-DODECYLBENZENE HEXAETHYLBENZENE... 

Problem 11.40 Outline a synthesis of 2,3-dimethyl-2,3-diphenylbutane from benzene, propylene, and any needed inorganic reagents. ... 

Three carbon—carbon initiators are currently available commercially, 2,3-dimethyl-2,3-diphenylbutane [1889-67-4] (1), 3,1 dimethyl 3,1 (llplicnylllrxanc [10192-93-5] (2), and l,l,2,2-tetraphenyl-l,2-bis(trimethylsiloxy)ethane [22341-08-8] (3). 

Evaporate the mixture using a rotary evaporator and put the solvent collected in the evaporator into the hypochlorite bath. Dissolve the residue in toluene (5 mL) and apply it to a chromatography column prepared using alumina (200 g) and toluene. Run the column using toluene as the eluant and combine the fractions shown by TLC to contain a single component. The products obtained are, in order, 2,3-dimethyl-2,3-diphenylbutane, 0.13 g (from dimerization of the solvent cumene), /V-ethyl-3-chlorophenothiazine, m.p. 115-117°C, 0.33 g (14%) and 3-chlorophenothiazine 16, m.p. 195-196°C, 1.06 g (58%). 

C18H22 2,3-dimethyl-2,3-diphenylbutane 1889-67-4 1.914E+10 153.020 33455 C22H44 hexadecylcyclohexane 6812-38-0 2.912E-I-10 223.910... 

C18H22 2,3-DIMETHYL-2,3-DIPHENYLBUTANE -159.612 1.9863E+00 -1.7695E-03 8.1753E-07 -1.5467E-10 298 1500... 

AI3-23740 Benzene, 1, T-(1,1,2,2-tetramethyl-1,2-ethanediyl)bis-Bibenzyl, a,a,a, a -tetramethyl- Butane, 2,3-dimethyl-2,3-diphenyl-a,a -Dicumyl 2,3-Dimethyl-2,3-diphenylbutane EINECS 217-568-2 NSC 34859 Perkadox 301,1 -(1,1,2,2-Tetramethylethylene)di-benzene. Akzo Chemie. 

Synthesis of biaryl compounds is not the only use for oxidative dimerization it can lead to formation of new carbon-carbon bonds also in the aliphatic series. These reactions have been carried out with peroxides, especially diacetyl peroxide, for example, the formation of 2,3-dichlorosuccinic acid from chloro-acetic acid and of 2,3-dimethyl-2,3-diphenylbutane from isopropylbenzene 291 and hydrogen peroxide292 and a mixture of ammonium persulfate and sodium... 

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