6008-55-5Relevant academic research and scientific papers
A novel synthesis of cyclic polythioethers using liquid-liquid phase-transfer catalysis
Takido, Toshio,Toriyama, Masaharu,Ogura, Kazuhiro,Kamijo, Haruo,Motohashi, Shigeyasu,Seno, Manabu
, p. 1295 - 1301 (2007/10/03)
The synthesis of cyclic polythioethers has been achieved by the reactions of dithiols with alkyl dihalides. Thiols are not only hard to handle owing to their unpleasant smell, but also they are easily oxidizable, thus it is not easy to obtain various dithiols. However, we have developed a procedure for the preparation cyclic polythioethers by the reaction of dithioiminium salts with alkyl dihalides using phase-transfer catalyst without the use of dithiols, and have examined the ion recognition of these compounds.
Synthetic potentialities of sulfonylsulfonium salts: A new approach to the preparation of disulfonium dications
Shevchenko,Nenaidenko,Balenkova
, p. 1415 - 1420 (2007/10/03)
A new efficient method for the generation of disulfonium dications whose subsequent hydrolysis selectively affords monosulfoxides was developed based on the oxidation of bis-sulfides by trifluoromethanesulfonic anhydride.
Formation of sulfur-centered cation radicals by photofragmentation
Glass,Broeker,Anklam,Asmus
, p. 1721 - 1724 (2007/10/02)
The selected dialkyl dithioethers 1,5-dithiocane, 1,4-dithiepane, 1,4-dithiane, and 2,6-dithiaheptane are readily monoalkylated in nitromethane by tert-butyl 0-trifluoromethanesulfonyl-3-hydroxyperoxypropanoate 6, to give the corresponding sulfonium salt peresters 2a-c, and 3 in good yield. Laser flash photolysis of these compounds affords the known two-sulfur, three-electron stabilized cation radicals 2a, b, and 5 which were characterized by optical absorption spectroscopy.
Heterocyclisation alkylante radicalaire par photolyse de sulfures ethyleniques. III. Photolyse de sulfures de butene-3 yle-1 et hexene-5 yle-1
Bastien, Gerard,Surzur, Jean-Marie
, p. 84 - 88 (2007/10/02)
Photolysis of allyl but-3-en-1-yl sulfide (I) gives the thiolan 3 and the 3-allylthiolan 4 resulting from "forbidden" 5-endotrig cyclization.Photolysis of allyl hex-5-en-1-yl sulfide (III) gives, besides the mixture of six- and seven-membered non-alkylated heterocycles 10 and 11, exclusively the alkylated 2-(but-3-enyl) thian 12.These and other results confirm and generalize the mechanism proposed earlier for the photolytic cyclization of pent-4-enyl sulfides.Photolitic cleavage of unsaturated allyl or benzyl sulfides gives the unsaturated thiyl radical.The unsaturated radical undergoes an intramolecular reversible addition out of the cage.Then the more stable cyclized radical is trapped selectively by the allyl or benzyl radical.
