Sec-BUTYL ISOPROPYL DISULFIDE

SULFIDE SYNTHESIS IN PREPARATION OF UNSYMMETRICAL DIALKYL DISULFIDES sec-BUTYL ISOPROPYL DISULFIDE... 

Disulfide, sec-butyl isopropyl (8) Disulfide, 1-methylethyl 1-methylpropyl (9) (—)... 

HEXAHYDRO - 4a,5 - DIMETHYL - 2(3H) - NAPHTHALE-NONE and 2-TRIMETHYLSILYLOXY-1,3-BUTADIENE AS A REACTIVE DIENE DIETHYL trans -4-TRIMETHYL-SILYLOXY-4-CYCLOHEXENE-1,2-DICARBOXYLATE. Sulfur substitution also continues to be of high interest, and three preparations on sulfide synthesis are included BENZYL SULFIDE DIALKYL AND ALKYL ARYL SULFIDES NEOPENTYL PHENYL SULFIDE and UNSYMMETRICAL DIALKYL DISULFIDES sec-BUTYL ISOPROPYL DISULFIDE. 

Butylindane, 55, 10 Butyl isocyanate, 55, 98 fezr-BUTYL ISOCYANIDE, 55, 96 sec-BUTYL ISOPROPYL DISULFIDE, 58, 147, 148, 151... 

The major advantage of the seunpling technique developed, was that some trace chemicals could be trapped tind described for the first time as Black Truffle aroma constituents. In particular, some compounds, important flavor contributors, generally appearing in small concentrations, such as benzaldehyde, propanal, ethyl acetate, anisole or dimethyl disulfide - previously identified in Shiitake mushrooms (9) - could be characterized. This was also the case for three aromatic compounds, toluene, xylene and ethyl benzene, well known as raw vegetable constituents (1 ). In addition, two aliphatic esters, isopropyl and sec-butyl formates, and one cyclic sulfur compound (2-formyl thiophene) previously reported respectively in plums and apples (W) and in coffee and bread products (n) were identified. 

To obtain a measure of the versatility of the method, a series of alkyl Grignard reagents were examined (32,90). The isopropyl and sec-butyl reagents failed to generate the corresponding diphosphine disulfide with... 

FIG. 6—Standard chromatogram of 13 sulfur compounds in the range of 170-300 ppm sulfur. The column was an 18 m, 0.25 mm id, 0.25 micron PDMS, programmed at 30°C for 2 min to 200°C at 30 C /min lit rate 10 1, Helium carrier, 30 cm/sec [Peak identifications (1) Dimethyl Sulfide (2) Isopropyl mercaptan (3) Tert-butyl mercaptan (4) Propyl mercaptan (5) Sec-butyl mercaptan (6) Isobutyl mercaptan (7) Diethyl sulfide (8) Butyl mercaptan (9)Dimethyl disulfide (10) Dipropyl sulfide (11) Diethyl disulfide (12) Diisoprcpyl disulfide (13) Dipropyl disulfide]. 

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