Sulfide, dimethyl acids

The formation of dimethyl sulfide, dimethyl sulfone, and methane (by H-abstraction) observed in these photolyses is thus accounted for. Hydrogen abstraction by the methylsulfinyl radical affords methanesulfenic acid, CH3SOH, a very reactive molecule, which rapidly undergoes a series of secondary reactions to produce the methanesulfonic acid, methyl methanethiolsulfonate (CH3S02SCH3), and dimethyl disulfide which were also observed during these photolyses. 

The edible portion of broccoli Brassica oleracea var. italica) is the inflorescence, and it is normally eaten cooked, with the main meal. Over 40 volatile compounds have been identified from raw or cooked broccoli. The most influential aroma compounds found in broccoli are sulfides, isothiocyanates, aliphatic aldehydes, alcohols and aromatic compounds [35, 166-169]. Broccoli is mainly characterised by sulfurous aroma compounds, which are formed from gluco-sinolates and amino acid precursors (Sects. 7.2.2, 7.2.3) [170-173]. The strong off-odours produced by broccoli have mainly been associated with volatile sulfur compounds, such as methanethiol, hydrogen sulfide, dimethyl disulfide and trimethyl disulfide [169,171, 174, 175]. Other volatile compounds that also have been reported as important to broccoli aroma and odour are dimethyl sulfide, hexanal, (Z)-3-hexen-l-ol, nonanal, ethanol, methyl thiocyanate, butyl isothiocyanate, 2-methylbutyl isothiocyanate and 3-isopropyl-2-methoxypyrazine... 

Sodium toluene dispersion of, 55, 65 Sodium p-toluenesulfinate, 57, 103 Spiro[4 n] alkenones, 58, 62 Spiro[cyclopentane-l,l -indene] 55, 94 Squalene, 56, 116 Squalene, 2,3-epoxy, 56, 116 Stannic chloride, 56, 97 Steroids synthesis, 58, 85 E Stilbene, 55, 115,58, 73 z-Stilbene, 58, 133 Styrene, 56, 35,58, 43 Styrene glycol, 55, 116 Styrene glycol dimesylate, 55, 116 Succinic acid, 58, 85 Succinic anhydride, 58, 85 Sucunimide, 56, 50, 58, 126 Succimmide, Vbromo, 55, 28, 56, 49 SULFIDE CONTRACTION, 55, 127 Sulfide, dimethyl-, 56, 37 SULFIDE SYNTHESIS, 58, 143,58, 138 SULFIDE SYNTHESIS ALKYL ARYL SULFIDES, 58, 143 SULFIDE SYNTHFSIS DIALKYL SULFIDES, 58, 143 SULFIDE SYNTHESIS UNSYMMETRI-CAL DIALKYL DISULFIDES, 58, 147 SULFONYL CYANIDES, 57, 88 Sulfur tetrafluoride, 57, 51... 

C H402, Acetic acid palladium complex, 26 208 tungsten complex, 26 224 C2H7PS, Phosphine sulfide, dimethyl-manganese complex, 26 162 C H,N2, 1,2-Ethanediamine chromium complex, resolution of, 26 24, 27... 

A one-pot procedure combines the generation of trimethylsulfonium hydrogensulfate (Me3S HS04 ) from dimethyl sulfide, sulfuric acid and methanol, and its use in situ for oxirane formation with carbonyl compounds [451] (Table 4.5). 

Dimethoxy 1 methyl 2(1//) quinoxalinone-3-proprionylcarboxylic acid hydrazide Dimethyl sulfide Dimethyl sulfoxide Deoxyribonucleic acid 5is-(2,4-dinitrophenyl) oxalate Dansyl chloride Dansyl hydrazine... 

OXIDATION, REAGENTS Dimethylsulf-oxide-Acetic anhydride. 1-Amyl hydroperoxide. N-Bromosuccinimide. Ceric ammonium nitrate. Chloramine. o-Chlo-ranil. 1-Chlorobenzotriazole. N-Chloro-succinimide-Dimethyl Sulfide. Chromic acid. Chromic anhydride. Chromyl chloride. Cobalt(ll) acetate. Cupric acetate monohydrate. Cupric nitrate-Pyridhic complex. 2,3-Dichloro-5,6-dicyano-l, 4-benzoquinonc. Dicyclohcxyl-18-crown-... 

An interesting approach to develop an asymmetric allylic alkylation catalyst by using a peptide-based phosphine hgand was examined by Gilbertson (Scheme 3.70) [135]. Phosphine-sulfide amino acid 211 was incorporated into a peptide sequence on a polymer support After reduchon of the phosphine sulfide to phosphine, the polymer-supported pephde sequence having phosphine-(support-Gly-Pps-D-Ala-Pro-Pps-D-Ala-Ac) was prepared. The complex of the peptide with Pd was uhhzed for the asymmetric addition of dimethyl malonate 202 to 3-acetoxycy-clopentene 212 to give 213 in 59% yield and 66% ee. 

Synonyms Bis (2-methoxycarbonylethyl) sulfide p,p-Dicarbomethoxydiethyl sulfide Dimethyl 3,3 -thiodipropionate DMTDP Propanoic acid, 3,3 -thiobis-, dimethyl ester Propionic acid, 3,3 -thiodi-, dimethyl ester 3,3 -Thiobis (methyl propionate) Thiodipropionic acid, dimethyl ester Empirical C8H14O4S Formula S(CH2CH2COOCH3)2 Properties M.w. 206.26 b.p. 130 C (1-2 mm)... 

Ozone dimethyl sulfide Carboxylic acid esters from enolethers s. 31,640... 

The identified components and their peak areas by GC are listed in Tables I and II. For both the fruits and leaves, the composition of the volatiles was relatively simple. In the headspace volatiles, ethanal was the main component (96.4%). This compound is probably produced in the fruit during storage from pyruvic acid by decarboxylation under anaerobic respiration (4). Among the other compounds were dimethyl sulfide, dimethyl disulfide, and methane- and propane-thiols, together with two unusual polysulfides which have not been found in the Allium species. The sulfur compounds in the leaves were similar to those found in the fruit, but the concentrations of ( )-2-hexenal and (Z)-3-hexenol, which are well known to be responsible for a green note (5), were much higher than found in the fruit. 

Related Reagents. Boron Trifluoride-Acetic Acid Boron Trifluoride-Acetic Anhydride Boron Trifluoride Etherate Boron Trifluoride Dimethyl Sulfide Tetrafluoroboric Acid. 

Related Reagents. A/-Chlorosuccinimide-Dimethyl Sulfide Chromic Acid Dimethyl Sulfide-Chlorine Dimethyl Sulfoxide-Acetic Anhydride Dimethyl Sulfoxide-Dicyclo-hexylcarbodiimide Dimethyl Sulfoxide-Oxalyl Chloride Dimethyl Sulfoxide-Phosphorus Pentoxide Dimethyl Sulfoxide-Sulfur Trioxide/Pyridine Dimethyl Sulfoxide-Trifluoroacetic Anhydride Dimethyl Sulfoxide-Triphosgene Manganese Dioxide Pyridinium Chlorochromate Pyridinium Dichromate Ruthenium(rV) Oxide Silver(I) Carbonate on Celite 1,1,1-Triacetoxy-1,1-dihydro-1,2-benziodoxol-3( 1 H)-ons. 

---