1029-96-5Relevant academic research and scientific papers
Oxidation reactions of 4H-chalcogenopyrans
Drevko,Smushkin,Kharchenko
, p. 777 - 780 (1996)
We have studied the oxidation of 4H-chalcogenopyrans and chalcogenopyrylium salts by lead tetraacetate. We have established that the major reaction products on oxidation of 2,6-diphenyl-4H-thiopyran and selenopyran are 2,6-diphenyl-4H-thio(seleno)pyran-4-
Substituted sulfur aromatic heterocyclic compound, preparation method and application thereof
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, (2020/11/23)
The present invention provides a sulfur aromatic heterocyclic compound represented by a formula I, and an optical isomer thereof, wherein Y is an anion, R1 is NR4R5, hydrogen, halogen, a C1-C4 alkyl group, a C1-C4 alkoxy group, a trifluoromethoxy group
Chalcogenopyranones from disodium chalcogenide additions to 1,4- pentadiyn-3-ones. The role of enol ethers as intermediates
Leonard, Kristi,Nelen, Marina,Raghu, Madhavi,Detty, Michael R.
, p. 707 - 717 (2007/10/03)
Enol ethers 9 are formed as a mixture of E- and Z-isomers from the addition of ethanol to 1,4-pentadiyn-3-ones 2 in sodium ethoxide/ethanol. The enol ethers react with disodium chalcogenides to give the corresponding 2,6- disubstituted chalcogenopyranones
The reaction of unsaturated carbonyl compounds with "activated" sulfur
Chiacchio, Ugo,Corsaro, Antonino,Rescifina, Antonio,Testa, Maria Gabriella,Purrello, Giovanni
, p. 223 - 229 (2007/10/02)
In a reinvestigation of the sulfuration reaction of cinnamylideneacetophenone (1) with sulfur and triethylamine at room temperature, new products 6-benzoyl-3-phenyl-1,2-dithiolo1,2-dithiole (5), 6-benzoyl-3-phenyl-1,2-dithiine (6) and 5-benzoyl-3-b
Synthesis of 2,6-Diaryl-4H-thiopyran-4-ones
Boaz, Neil W.,Fox, Kristine M.
, p. 3042 - 3045 (2007/10/02)
A novel synthesis of 2,6-diaryl-4H-thiopyran-4-ones has been developed.The title compounds were prepared by two sequential thio-Claisen condensations of a dialkyl ketone and two dithioesters.The intermediate β-thioxo ketone from the first condensation was converted to the corresponding β-(methylthio)enone for both protection and reactivity purposes.Facile addition-elimination of the methylthio moiety by a β-thioxo ketone enolate generated in the second thio-Claisen condensation afforded the desired heterocycle.This new method is rapid and simple with the only requirement being moderate substituent alkaline stability.
THE OXIDATION REACTIONS OF THIOPYRANS
Plotnikov, A. M.,Shebaldova, A. D.,Kharchenko, V. G.
, p. 1226 - 1229 (2007/10/02)
A method was developed for the preparation of compounds with 4H-thiopyrone structure by the oxidation of the corresponding 4H-thiopyranes and their condensed analogs by potassium permanganate.
