Sulfides 2-naphthyl methyl

A remarkably high diastereoselective excess was obtained in the addition of the anion of (S)-(-)-methyl 1-naphthyl sulfoxide to n-alkyl phenyl ketones. The sulfoxide was prepared in optically pure form by oxidation of the complex of methyl 1-naphthyl sulfide and 13-cyclodextrin with peracetic acid followed by crystallization. Desulfurization of the adducts provided enantiomerically pure tertiary alcohols (393]. 

Naphthothiete (34) with methyllithium (McM —McLi, Scheme 10) formed 8-lithio-l-naphthyl methyl sulfide (60, M —Li) that on taking up 1 or 2 equiv of additional 34 was converted into dimer 63 or trimer 64. Sulfide 60 at treating with water formed methyl 1-naphthyl sulfide (62). Dimer 63 was also prepared by an independent synthesis between 60 (M = MgCl) and 1-naphthyl thiochloride (61). 

The aryl group in the same organosulfur ligand as well as in methyl naphthyl sulfide and 2-biphenyl methyl sulfide can be metallated by palla-... 

In a number of cases aromatic thioethers can be used for the stabilization of polyolefins however, in most cases their stabilizing effectiveness is low. Of llie best investigated compounds, diphenyl sulfide, phenyl-benzyl sulfide, di-/3-naphthyl sulfide, methyl-/ -naphthyl sulfide [41], sulfides of the thiophene series [28], etc., are known. In most cases amino- or phenol sulfides such as 2,2 -thio-bis-(4-methyl-6-tert-butyl-phenol), thio-bis-/3-naphthol, thio-bis-(N-phenyl-2-naphthylamine) [41], etc., are used. 

Methyl (99%) and ethyl 2-naphthyl sulfide (68%), (2-naphthylthio)acetic acid (87%), and 2-naphthyl phenyl sulfide (43%) have been prepared by the same method. 

In redox reactions, isolated oxidative enzymes such as laccase C from Trametes and horseradish/soybean peroxidases (with mediators) have been shown to possess good catalytic activity in common ILs on syringaldizine and veratryl alcohol, respectively [35]. Recently, oxidase-peroxidase-catalyzed chemo- and stereoselective sulfoxidations of thioanisole and methyl-2-naphthyl sulfide have been successfully carried out with a system of Coprinus cinereus (CiP) peroxidase and Aspergillus niger glucose oxidase (GOD) in 10% water in [BMIM][PF6] (Scheme 2). An enantiomeric... 

Ci,Ru3 o-Tolyl- -naphthyl-8ulfid 8, 622. m-Tolyl-a-naphthyl-suIfid (, 822. p-Tolyl-s-naphthyl-eulfid 8, W2. Benzyl-x-naphthyl.euUid 8, 622. o.Tolyl- -naphthyI.siilfid 8, 658. m-Tolyl./J.naphthyl-suIfid 8, 668, p-Tolyl-d-naphthyl-sulfid 8, 859. 2.BenzyIhy(fiyl.thiophen 17, 82, II82. I nHigSe iMnzyl-z-naphthyl.aelenid 8, 626. C],HnAz Methyl-phenyl-x-naphthyl-arsin 18 II410. 

The DszC enzyme was able to convert the following compounds other than DBT thioxanthen-9-one, 2,8-dimethyl DBT, 4,6-dimethyl DBT, and 3,4-benzo DBT. Non-organosulfur compounds such as biphenyl, carbazole, and dibenzofuran did not show any activity. This indicates that dszC specifically recognizes sulfur atom [151]. One study specifically examined the DszC enzyme for oxidation of aryl sulfides [179] and reported oxidation of many sulfides including, naphthyl methyl sulfide, phenyl methyl sulfide, and its alkyl derivatives. 

Methyl- or 2-ethyl-benzo[Z> ]thiophenes are conveniently prepared by treatment of 2-benzo[6]thienyllithium with the appropriate alkyl sulfate <70AHC(11)177). Clemmensen or Wolff-Kishner reductions of the 2-acylbenzo[Z>]thiophenes are useful, but since acylation produces a mixture of the 2- and 3-acyl isomers (Section 3.14.2.4), these must be separated. Cyclization of phenyl phenacyl sulfide with hydrofluoric acid leads exclusively to 2-phenyl-benzo[6]thiophene, and 3-phenylbenzo[6]thiophene can be rearranged to the 2-isomer in hydrofluoric acid (Section 3.15.2.3.2). Aromatization of 2-cycIohexenylbenzo[6]thiophene, obtained by condensation of the 2-lithio reagent with cyclohexanone, gives 2-phenyl-benzo[6]thiophene, and the reaction is adaptable to the 2-(l-naphthyl) derivative also. 

The thiazoline was obtained in the best yields and with the lightest color from freshly prepared l-methyl-l-(l-naphthyl)-2-thiourea. The air-dried thiourea loses hydrogen sulfide and ammonia after several days storage. 

This general reaction can be used for preparing other un-symmetrical thioureas when the desired cyanamides can be obtained. The submitter has also prepared l-methyl-l-(l-naph-thyl)-2-selenourea, m.p. 174-175° with decomposition, and l-ethyl-l-(l-naphthyl)-2-selenourea, m.p. 168-170° with decomposition, by substitution of hydrogen selenide for hydrogen sulfide. 

NAPHTHYLMETHYLCARBAMATE or 1-NAPHTHYL N-METHYL-CARBAMATE or o-NAPHTHYL N-METHYLCARBAMATE (63-25-2) CnHjjNOj Combustible solid solution may be flammable (flash point about 390°F/199°C, depending on carrier solvent). Contact with strong reducing agents, including hydrides, nitrides, sulfides, alkali metals, or active metals may release flammable hydrogen gas. Incompatible with... 

Xytrex 300. See Polyethersulfone resin Xytrex 450. See Polyetheretherketone Xytrex 646. See Polyphenylene sulfide resin XZ 26001.00, XZ 26005.00. See Styrene/acrylates copolymer Yacca. See Red gum YAD-122. See (N-Pyrrolidonepropyl) methylsiloxane-dimethylsiloxane copolymer Yara yara. See P-Naphthyl methyl ether Yarmor Yarmor pine oil. See Pine (Pinus palustris) oil... 

Siinivasan, C., Perumal, S., Arumugam, N., and Murugan, R., Linear free-energy relationship in naphthalene system-substituent effects on carbon-13 chemical shifts of substituted naphthyl-methyl sulfides, Ind J. Chem., 25A, 227, 1986. 

More recently, Murahashi has used flavin 28 to oxidize naphthyl methyl sulfide to its sulfoxide in 72% ee (Eq. (8.13)) [52]. 

Since the determination of inhibitors in polymers by Drushel et al. [13] little information has been added to the literature on the quantitative aspects of the direct examination of polymer films by phosphorescence spectroscopy. These authors examined phosphorescence (at liquid-nitrogen temperature) of thin EPR films containing Santonox R (2,2 -di-methyl-5,5 -di-r -butyl-4,4 -dihydroxydiphenyl sulfide) and V-phenyl-2-naphthyl-amine (PBN). The rather intense phosphorescence of PBN may be used to advantage when other additives interfere in the UV absorption method. As to quantitative phosphorescence analysis, several factors, e.g. film thickness, concentration quenching, and background absorption, etc., affect the linearity of the analytical working curves and precision of the measurements [13]. The reliability of a correlation between stabiliser concentration in the film and phosphorescence intensity at 77 K is also influenced by the degree of crystallinity [544]. 

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