The synthesis and properties of 6-trifluoromethyl-substituted thiopyrano[3,4-d]isoxazole derivatives
作者:Serhii A. Siryi、Vadim M. Timoshenko、Yurii G. Vlasenko、Eduard B. Rusanov、Yuriy G. Shermolovich
DOI:10.1007/s10593-015-1750-1
日期:2015.7
cleavage of the isoxazoline ring of the obtained compounds led to the formation of 6-trifluoromethyl-2Н-thiopyran derivatives with nitrile or carbonyl-containing functionality at position 3. Transformations of the thiopyran moiety in 4,7а-dihydro-3аН-thiopyrano[3,4-d]isoxazole were studied for the case of Pummerer reaction product with oxidized sulfur atom, ethyl 6-trifluoromethyl-4,7а-dihydro-3аН-thiopyrano[3
小说的第一代表4,7а二氢3А Н -thiopyrano [3,4 -d ]异恶唑的杂环系统,作为含有酯基,羧基,或羟甲基在3位和6位三氟甲基是由获得的3 + 2]乙基cyanocarboxylate的环加成反应ñ氧化物和6-三氟甲基-2- Н噻喃,随后的进一步转化的乙基-6-三氟甲基4,7а二氢3А Н -thiopyrano [3,4 -d ]异恶唑-3-羧酸酯中间体。所得化合物的异恶唑啉环的断裂导致6-三氟甲基-2Н的形成与腈或含羰基的官能度-噻喃衍生物在位置在噻喃部分的3变换4,7а二氢3А Н -thiopyrano [3,4 -d ]异恶唑进行了研究用于Pummerer重反应产物的情况下与氧化的硫原子,乙基-6-三氟甲基4,7а二氢3А Н -thiopyrano [3,4 -d ]异恶唑-3-羧酸甲酯5-氧化物,将其转化为乙基-6-三氟甲基-4 Н -thiopyrano [3
Sulfur-assisted ring contraction of polyfluoroalkylthiopyran derivatives as a route to functionalized fluorine-containing thiophenes
作者:Sergiy A. Siry、Vadim M. Timoshenko、Yuriy G. Schermolovich
DOI:10.1016/j.jfluchem.2015.11.002
日期:2016.1
A synthetic route to functionalized α-(polyfluoroalkyl)thiophenes based on the reactions of ringcontraction of polyfluoroalkyl substituted thiopyran derivatives has been explored. Potent 6-membered precursors for the preparation of thiophenes were obtained by the addition of bromine to the double bonds of 2-chloro-2-(trifluoromethyl)-3,6-dihydro-2H-tetrahydrothiopyran and 6-(polyfluoroalkyl)-2H-thiopyrans
Oxidative transformations of 6-trifluoromethyl-2H-thiopyran as a route to fluoro-containing thiopyranosides
作者:Sergiy A. Siry、Vadim M. Timoshenko
DOI:10.1016/j.tetlet.2011.09.080
日期:2011.11
The synthesis of cis- and trans-6-(trifluoromethyl)-3,4-dihydro-2H-thiopyran-3,4-diols from 6-(trifluoromethyl)-2H-thiopyran via an OsO4-catalysed dihydroxylation and bromohydroxylation–alkaline hydrolysis sequence is described. Acetylation of the diols followed by S-oxidation affords the corresponding cis- and trans-3,4-diacetoxy-6-(trifluoromethyl)-3,4-dihydro-2H-thiopyran S-oxides which reacted