<i>Allium</i> Chemistry: Microwave Spectroscopic Identification, Mechanism of Formation, Synthesis, and Reactions of (<i>E</i>,<i>Z</i>)-Propanethial <i>S</i>-Oxide, the Lachrymatory Factor of the Onion (<i>Allium cepa</i>)
作者:Eric Block、Jennifer Z. Gillies、Charles W. Gillies、Ali A. Bazzi、David Putman、Larry K. Revelle、Dongyi Wang、Xing Zhang
DOI:10.1021/ja960722j
日期:1996.1.1
Flow pyrolysis of 2-methyl-2-propyl 1'-propenyl sulfoxide (9b) affords a 98:2 mixture of (Z)- and (E)-propanethial S-oxide ((Z)- and (E)-5b), both characterized by Fourier transform microwave (FT-MW) spectroscopy, Sulfines (Z)- and (E)-5b are also identified by FT-MW in chopped onion volatiles and by NMR spectroscopy in onion extracts. Similarly, flow pyrolysis of 2-methyl-2-propyl vinyl sulfoxide (9c) affords (Z)- and (E)-isomers of ethanethial S-oxide (5a), identified by FT-MW methods. Pyrolysis in the presence of D2O affords (Z)-5a-d(1) and (Z)-5a-d(2) from 99 and (Z)-5b-d(1) from 9b; (Z)-5b-d(1) is also produced when an onion is homogenized in D2O. Pyrolysis of 9c with ethyl propiolate gives ethyl (E)-3-(vinylsulfinyl)acrylate (10). Neat 59 at 100 degrees C gives acetaldehyde. On standing, 5b dimerizes to trans-3,3-diethyl-1,2-dithietane 1,1-dioxide (12a); Me(3)SiCH=S+-O- (5f) undergoes an analogous dimerization. Compound 5b shows moderate potency as an anticarcinogen in inducing the enzyme quinone reductase.
Low Pressure Hydrogenation of Unsaturated Sulphides with Homogeneous and Heterogeneous Ruthenium Catalysts
Ru2O . nH(2)O and [Ru3O(AcO)(6)(H2O)(3)](AcO-)-Ac-+ were examined for catalytic activity in the hydrogenation of a series of unsaturated sulphides under heterogeneous and homogeneous conditions, respectively. By the appropriate combination of these two methodologies, a number of saturated sulphides could be synthesized in satisfactory to good yields, thus minimizing side reactions.
Reactions of Enol Ethers with Carbenes. III.<sup>1</sup> Vinyl Sulfides and Δ<sup>3</sup>-Dihydrothiapyran<sup>2</sup>
作者:William E. Parham、Lynette Christensen、Siemen H. Groen、R. M. Dodson
DOI:10.1021/jo01031a025
日期:1964.8
The Base-catalyzed Isomerization of Allyl to Propenyl Sulfides
作者:Charles C. Price、William H. Snyder
DOI:10.1021/jo01059a505
日期:1962.12
Krompiec; Suwinski; Gibas, Polish Journal of Chemistry, 1996, vol. 70, # 1, p. 133 - 134