2-Polyfluoroalkyl thiopyrylium salts: synthesis and reactions with nucleophiles
作者:Sergiy A. Siry、Vadim M. Timoshenko
DOI:10.1016/j.tetlet.2010.09.131
日期:2010.12
2-Polyfluoroalkylthiopyrylium salts have been synthesized by oxidative aromatization of 2-polyfluoroalkyl-2H-thiopyrans with triphenylmethane tetrafluoroborate. Nucleophilic addition of methanol, sodium azide, or urea to 2-trifluoromethylthiopyrylium tetrafluoroborate in a basic medium proceeds at the α-position to give the corresponding 2-substituted 6-trifluoromethyl-2H-thiopyrans whereas imidazoles
Asymmetric induction in thia-Diels-Alder reactions of chiral polyfluoroalkylthionocarboxylates
作者:Vadim M. Timoshenko、Sergiy A. Siry、Alexander B. Rozhenko、Yuriy G. Shermolovich
DOI:10.1016/j.jfluchem.2009.11.011
日期:2010.2
A series of chiral S- or O-alkyl thionoesters have been synthesized by treatment of trifluorothioacetyl- or 2,2,3,3-tetrafluorothiopropionyl chloride with corresponding thiols or alcohols. The thia-Diels-Alder reaction of the thionoesters with symmetrical 1,3-dienes proceeds with diastereoselectivity up to 60%. Structures of cycloaddition products and corresponding transition states have been studied at the DFT level of approximation. The experimentally observed diastereomeric excess has been referred to differences in activation energies of transition states, preceding formation of the diastereomeric cycloaducts. (C) 2009 Elsevier B.V. All rights reserved.
Fluorothiacyl chlorides and polymers thereof
申请人:DU PONT
公开号:US03113936A1
公开(公告)日:1963-12-10
Synthesis and reactivity of fluorine-containing thiols and thioacyl halides
作者:A. Yu. Sizov、A. N. Kovregin、R. N. Serdyuk、M. V. Vorob’ev、V. A. Porosyatnikov、A. A. Tsvetkov、D. O. Korneev、A. F. Ermolov
DOI:10.1007/s11172-006-0399-4
日期:2006.7
α-hydropolyfluoroalkanethiols and polyfluorothioacyl halides via thermal splitting of benzyl polyfluoroalkyl sulfides under the action of phosphoruspentoxide was proposed. The thiols obtained were used as starting materials for the synthesis of α-hydropolyfluoroalkanesulfenyl chlorides. The properties of the resulting F,S-containing compounds were studied.