- A new, efficient and simple method for the thionation of ketones to thioketones using P4S10/Al2O3
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A simple, efficient and new method has been developed for the synthesis of thioketones by thionation of ketones using P4S10/Al 2O3 in acetonitrile. It has been found that the P 4S10/Al2O3 combination provides a simple and convenient method for the synthesis of thioketones.
- Polshettiwar, Vivek,Kaushik
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p. 6255 - 6257
(2007/10/03)
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- π-Face-selective hetero Diels-Alder reactions of 3,4-di-tert-butylthiophene 1-oxide. An excellent trapping reagent for thioaldehydes and thioketones
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Hetero Diels-Alder reactions of 3,4-di-tert-butylthiophene 1-oxide (1) with thioaldehydes and thioketones take place exclusively, except the reaction with thiobenzophenone, at the syn-π-face of 1 with respect to the S=O bond. The π-face selectivity was ex
- Takayama, Jun,Fukuda, Seiko,Sugihara, Yoshiaki,Ishii, Akihiko,Nakayama, Juzo
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p. 5159 - 5162
(2007/10/03)
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- Silicon-Assisted Synthesis of Thiocarbonyl Derivatives and Reactivity of Dienophilic Thioaldehydes
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Treatment of bis(trimethylsilyl) sulfide with CoCl2 * 6 H2O in the presence of aldehydes affords the corresponding thiocarbonyl analogues which can be trapped to avoid polymerization.The sulfurization reaction also takes place in the presence of TfOSiMe3, in which case, besides thioaldehydes, thioketones may be obtained in satisfactory yields.When thioaldehydes are generated with the CoCl2 * 6 H2O method the Diels-Alder reaction with cyclohexadiene occurs with very high selectivity in favor of the endo isomer, whereas when the TfOSiMe3-based method is employed, the stereochemistry of the cycloadduct can be conveniently selected toward endo or exo by varying the molar ratio of the sulfurating agent.
- Capperucci, Antonella,Degl'Innocenti, Alessandro,Ricci, Alfredo,Mordini, Alessandro,Reginato, Gianna
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p. 7323 - 7328
(2007/10/02)
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- Gas Phase Reactions, 24. The Thermal Generation of Thiocarbonyl Compounds
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Thiocarbonyl derivatives R1R2C=S with R1, R2 = H, CH3, C6H5 can be generated thermally in the gas phase from a variety of precursors.Especially advantageous are the cleavage of propene from allyl sulfides or, for their preparation in pure form, the pyrolysis of dithietane or trithiolane derivatives.Photoelectron spectroscopy proves to be well-suited for gas analysis in the flow tube used, for the optimization of the decomposition conditions, and via assignment of the observed ionization patterns for the characterization of the thioaldehydes and thioketones prepared.
- Bock, Hans,Hirabayashi, Takakuni,Mohmand, Shamsher
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p. 492 - 503
(2007/10/02)
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- Etude des spectres de masse des thiocetones cyclaniques et α-cyclaniques; mecanismes des fragmentations
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Twenty five cyclic and α-cyclic thioketones were examined by mass spectrometry.Compared with the oxygen analogues, the thioketones yielded a higher proportion of molecular ions.The loss of SH was found to be a characteristic fragmentation of cyclic and α-cyclic thioketones as for aliphatic thioketones.
- Paquer, D.,Morin, L.,Vazeux, M.,Andrieu, C. G.
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