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Thiol methylation

Conversion of carbon in the coal to gas is very high. With low rank coal, such as lignite and subbituminous coal, conversion may border on 100%, and for highly volatile A coals, it is on the order of 90—95%. Unconverted carbon appears mainly in the overhead material. Sulfur removal is faciUtated in the process because typically 90% of it appears in the gas as hydrogen sulfide, H2S, and 10% as carbonyl sulfide, COS carbon disulfide, CS2, and/or methyl thiol, CH SH, are not usually formed. [Pg.69]

Chemical Name N-[2-[ [ [5-(Dimethylamino)methyl-2-furanyl] methyl] thiol ethyl] -N -methyl-2-nitro-l, 1 -ethenedlamlne... [Pg.1348]

A new route to 2//-thiopyrans has been found in the cyclocondensation of thioenolates with a./J-unsaturated carbonyl compounds. The starting sulfur component can be methyl thiol-thione-ethanoate (90BSF446) or a /3-thienol-aldehyde (90ZC247) as shown by Eqs. (1) and (2), respectively. [Pg.183]

Park YS, Whalley AC, Kamenetska M, Steigerwald ML, Hybertsen MS, Nuckolls C, Venkataraman L (2007) Single molecule conductance and link chemistry a comparison of phosphines, methyl thiols and amines. J Am Chem Soc 129 15768-15769... [Pg.113]

Methyl 2-methyl-3-methylthio-4,6-benzylidene-/S-i>-idoside to methyl 2-methyl-3-de8Oxy-4,6-benzylidene-0-D-idoside Methyl 3-methylthio-5-L-xyloside to methyl 3-desoxy-/J-o-xyloside Ethyl thiol-D-ribonate tetraacetate to aldehydo-D-ribose tetraacetate Methyl thiol-D-gluconate pentaacetate to D-glucitol hexaacetate Ethyl tetraacetyl-0-D-glucopyranosyl xanthate to 1,5-anhydro-D-glucitol tetraacetate... [Pg.41]

The existence of pathways for the in vivo catabolism of MAP metabolites to compounds that require further metabolism before the xenobiotic moiety is excreted from the body indicates that metabolism of xenobiotics by the MAP may, in some cases, represent only a transient detoxication. The thiols and methylated thiols that are formed represent new xenobiotics. [Pg.176]

Reaction of these ylids with diaroyl- and aroylacetylenes fails even under forcing conditions. Reaction with DMAD, however, in the presence of cesium fluoride, leads to an alkoxypyrrole (no trace of thiopyrrole was observed) accompanied with the product of the addition of methyl thiol to DMAD 464... [Pg.344]

CN ( )-l-[2-[[(4-chlorophenyl)methyl]thiol-2-(2,4-dichlorophenyl)ethyll-l//-imida/.ole mononitrate... [Pg.1915]

In contrast to Sec-tRNA and fMet-tRNA formation, Pyl-tRNA y formation can occur by direct acylation of pyrrolysine onto tRNA i Pyrrolysine (Pyl), the twenty-second amino acid, was discovered incorporated in methylamine methyltrans-ferases from Methanosarcinaceae, a branch of methanogenic archaea that has the ability to reduce a wide variety of compounds to methane including carbon dioxide, acetate, methanol, methylated thiols, and methylated amines (72). Methanogenesis... [Pg.1895]

Their study shows that while 0-methylisourea guanidinates primary amino groups at high pH values (e.g. pH 10.5) more efficiently than it S-methylates thiols, the reverse is true below pH 10. Banks and Shafer (1972) exploited this observation in demonstrating that the thiol group at the active site of papain could he selectively S-methylated at pH 7 without concomitant guanidination of lysyl residues. [Pg.71]

Dimethylamino)methyl-2-furanyl] methyl] thiol ethanamine Manufacturing Process... [Pg.1348]

Further reaction of A -chloroaniline 6 with ethyl (methyl)thioacetate yields azasulfonium ion 7, which forms ylide 8 upon deprotonation with triethylamine. After the ylide undergoes a [2,3]-Sommelet-Hauser-like rearrangement, a proton transfer and subsequent rearomatization produces the intermediate aniline derivative 9, which upon cyclization forms a transient tetrahedral anion. Collapse of the anion with loss of ethoxide produces the stable oxindole derivative 2. Removal of the methyl thiol functionality with Raney nickel produces the final product 3. [Pg.134]

The geometric, electronic and optical properties of oligothiophenes of two, four, six and eight units of head-to-head-tail-to-tail (HH-TT) regioselectivity and substituted by methyl, thiol and thiomethyl groups (Chart 8.15) were characterized in their neutral and p-doped states with quantum chemical calculations derived from semiempirical HF approaches and with the nonempirical valence effective Hamiltonian (VEH) method. Such calculations provide a good insight into the electronic properties measured for electropoly-merized chains [91]. [Pg.393]

F. Costanzo, D. ToneUi, G. Scahnani, J. Cornil, Theoretical investigation of the electronic and optical properties of oligothiophenes upon methyl, thiol and thiomethyl substitutions. Polymer, 47, 6692-6697 (2006). [Pg.415]

Lower dialkyl sulfides are often employed as valuable solvents. Most organic sulfides with low molecular mass have intense unpleasant odors. Cotmnercial dimethyl sulfide contains highly malodorous impurities such as carbon disulfide, carbonyl sulfide, methyl thiol, dimethyidisulfide, hydrogen sulfide and other sidfurous compounds at low levels. Dialkyl sulfide borane complexes of high purity are used to produce low odor dialkyl sulfides by enantioselective reduction. ... [Pg.86]

The sequence of linked metalloporphyrins has been found to act as a photonic wire. The photonic wire has some properties analogous to optical fibers and is expected to serve in information sciences. Ferrocene oligophenylene-vinylene methyl thiol bridges could be useful for wiring molecular electron-... [Pg.346]


See other pages where Thiol methylation is mentioned: [Pg.153]    [Pg.36]    [Pg.150]    [Pg.255]    [Pg.864]    [Pg.99]    [Pg.23]    [Pg.142]    [Pg.355]    [Pg.416]    [Pg.2143]    [Pg.864]    [Pg.97]    [Pg.1020]    [Pg.353]    [Pg.286]    [Pg.43]    [Pg.4484]    [Pg.421]    [Pg.45]    [Pg.282]    [Pg.50]    [Pg.55]    [Pg.81]    [Pg.82]   
See also in sourсe #XX -- [ Pg.293 ]




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1 -Methyl-1 - ethyl thiols

2-Methyl benzene thiol

2-Methyl-tetrahydrofuran-3-thiol

3-methyl-2-butene-l-thiol

5-Methyl-l,3,4-thiadiazole-2-thiol

Aryl thiols, methylation, synthesis

Methyl terminated aliphatic thiols

Methyl-4-tosylimidazole-5-thiol

S-Methyl thioethers, to protect thiols

Thiols, methylation

Thiols, methylation

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