Methyl-1,1-diphenylpropane

In a detailed study of the reaction of methylene ketones with carboxylic acids in the presence of polyphosphoric acid, pyran-4-ones were obtained from l,3-diphenylpropan-2-one, phenylpropan-2-one and pentan-3-one (61JA193). In the first case, formation of 2,6-dimethylpyran-4-one ( 14 R = H) rather than the 2-benzyl-6-methyl-3-phenyI isomer... [Pg.812]

By utilizing the above methods, a convenient route to the tetracyclic ketone 240, a derivative of the benzobicyclo[3.2.1]octane skeleton, has been developed847 using 2,-methoxy-5,-methyl-1,3-diphenylpropane 239 (Scheme 5.85). [Pg.721]

Abstract Porous copolymers have been prepared by suspension-emulsion polymerization of divinylbenzene with styrene or some methacrylic monomers di(methacryloyloxymethyl)naphthalene, methacrylic ester of p,p -dihydroxy-diphenylpropane diglycidyl ether, and dimethacrylglycolethylene in the presence and absence of chemically modified fillers (fumed silicas with grafted methyl and silicon hydride groups). The results of investigations of the unfilled and filled polymeric systems by IR and 13C NMR spectroscopies combined with AFM are presented. [Pg.103]

Although relatively small in number, these compounds are characterized by a high level of prenylation, including four di-, four tri-, and one tetraprenyl derivatives, and a low level of O-methylation with only two 2 -0-methylated compounds.149 Whether enzymic prenylation occurs prior to, or after, assembly of the diphenylpropane structure has yet to be determined. Examples of the diversity of prenylation among different flavonoid classes are shown in (26-33). [Pg.24]

All of tl products l,3 triphenylbenzene, 1,3-diphenylpropane, 1,3,5-triphenylpen-tane, ethylbenzMie, methylben2 ne, and styrene are volatile products of thermal degradation of polystyrene This kind of intramolecular cyclization is not likely to be important in thermal degradation of poly(methyl methacrylate) and poly(a-methylstyrene), because the reactive site is linked to two bulky substituents which restrict the rotation of the terminal carbon atom containing the unpaired electron and thus prevent it from coming into proper orientation to attack the other carbon atoms in the chain. [Pg.59]

Free-radical bromination of l-methyl-2-phenylcyclopropane (4) at — 78 °C followed by reduction of the products yields butylbenzene (5) and small amounts of 2-methyl- (6) and/or 1-methyl-1-phenylpropane (7). The light-induced addition of bromine to cis- and tranj-1,2-diphenyl-cyclopropane gave l,3-dibromo-l,2-diphenylpropane exclusively. The monophenyl deriva-... [Pg.2061]

The effect of the conformation of the three carbon (C3) linkage with two or more methyl groups, however, is considered to be recognized in the polymerization, from the analogy to the results of the excimer fluorescence of 1,3-diphenylpropane derivatives (34,... [Pg.190]

Diphenylpropane-l, 2-diol, A51.8 l-Tolyl-2-phenylethane-l,2-diol, A"14.2, A"14.5 3-Methyl-2-(l-naphthyl)butyric acid, A"45.9 3-Methyl-2-(2-naphthyl)butyric acid, A"45.10 Catalpone, Y"15.4... [Pg.225]

Hydroxy-l 2-diphenylpropane (Methyl-phenyWenzylcarbinol, 1 i-diphenylisopropyl alcohol, a.-hydroxy-a.-methyldibenzyl)... [Pg.267]

Fig. 18 Activation energy of p-relaxation in (a) low-molecular weight glasses and (b) linear polymers vs the cohesion energy or cohesion energy of Kuhn statistical segment, respectively [86, 88,103]. (a) (1) Pentanol (2) isopropylbenzene (3) 5-methyl-3-heptanol (4) decalin (5) 1,1-diphenylpropane (6) diethyl phthalate (7) glycerol (8) 6>-terphenyl (9) hexamethyl disolox-ane (10) tetra-a-methylstyrene (11) pentastyrene. (b) (1) Polyethylene (2) polyisoprene (3) poly(dimethylsiloxane) (4) poly(diethylsiloxane) (5) poly(phenylene oxide) (6) poly(ethylene terephthalate) (7) polytetrafluoroethylene (8) polycarbonate (9) polyamide (10) polypropylene (11) polymethacrylate (12) poly(vinyl fluoride) (13) poly(vinyl acetate) (14) poly(vinyl chloride) (15) poly(vinyl alcohol) (16) poly(methyl methacrylate) (17) poly(diphenyl oxypheny-lene) (18) poly(butyl methacrylate) (19) polystyrene (20) polyacrylonitrile (21) poly(a-methylstyrene) (22) poly(cyclohexyl methacrylate) (23) polyimide I (24) polyimide II (25) poly(metaphenylene isophthalamide) (26) polyisobutylene...

Benzyl benzoate Heptanoic anhydride T etradecanenitiile Tetradec-l-ene Methyl tiidecanoate Tetradecane 8-Thiapentadecane 1,3-Diphenylpropane Methyl tetradecanoate Pentadecane Pentadecylamine Methyl pentadecanoate 1 -Bromohexadecane 1 -Chlorohexadecane 1 -lodohexadecane Hexadecane Heptadecane Octadecane... [Pg.25]

An aq. soln. of tetraethylammonium fluoride as powerful H-bond electron donor added to a soln. of l,3-diphenylpropane-l,3-dione in tetrahydrofuran, the solvents removed at ca. 90° under reduced pressure, the residue dissolved in chloroform, and stirred 1 hr. at 30° with excess methyl iodide 2-methyl-1,3-diphenyl-... [Pg.501]

Styrene, benzene, toluene, allylbenzene, a-methylstyrene, indane, iso-propenylstyrene, 5,6-benzo-2-methyl-3,5-cyclo-hexadienone, propyl-propenylbenzene, diphenylethane, 1,3-diphenylpropane, dimers and trimers of styrene chloroacetaldehyde, chloroacetaldehyde, trichloroacetaldehyde, trichloropropanal, benzyl chloride, 2-chloroethylstyrene, 2,2-dichloroethenyl methacrylate,... [Pg.497]

Amino-2,3-diphenylpropan-1 -ol, A43.2 1 - Amino-1,2-diphenylpropan-2-ol, A 8.17 S-Methyl-A-tosyl-S-tolylsulphimide, Z8.1... [Pg.211]

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