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
Trifluoromethylated Thiopyranoid Glycals: Synthesis and Ferrier (I) Type Reactions
作者:Serhii A. Siry、Yurii G. Shermolovich、Vasyl V. Kinzhybalo、Tamara J. Bednarchuk、Vadim M. Timoshenko
DOI:10.1002/ejoc.201800643
日期:2018.11.1
containing thioglycal analogs were synthesized and studied as glycosylating agents in Ferrier rearrangement. The first examples of Ferrier rearrangement in fluorine containing thiopyran series were described. Influence of substrate nature on stereochemical outcome of reactions thiopyranoid glycals with different nucleophiles was discussed.