2,2,2-Trifluoroethyl aryl selenides: ArSeCH2CF3 (Ar=C6H5,p-CH3C6H4) and their derivatives ArSe(O)CH2CF3 and ArSe(X)2CH2CF3 (X=Cl, Br, OOCCF3)
作者:R. Khajuria、K.K. Bhasin、R.D. Verma
DOI:10.1016/0022-1139(93)02933-6
日期:1994.4
title selenides were prepared in good yield by reacting the appropriate aryl selenolate anions with 2,2,2-trifluoroethyl tosylate in refluxing tetrahydrofuran. These unsymmetrical bivalent selenides can be oxidised to the corresponding compounds of tetravalent selenium, ArSe(X)2CH2CF3 (X = Cl and Br) with elemental chlorine and bromine. The latter, upon basic hydrolysis, gave the selenoxides, ArSe(O)CHCF3
通过使合适的亚硒酸芳基酯阴离子与2,2,2-三氟乙基甲苯磺酸酯在回流的四氢呋喃中反应,以高收率制备标题硒化物。这些不对称的二价硒化物可以与元素氯和溴氧化为相应的四价硒化合物ArSe(X)2 CH 2 CF 3(X = Cl和Br)。后者在碱性水解后得到亚硒酸盐ArSe(O)CHCF 3。硒化物还通过硒化物与过氧化氢的直接反应形成。与三氟乙酸酐反应后,得到三氟乙酸酯衍生物ArSe(OOCCF 3)2 CH 2 CF 3,以定量得出。通过元素分析,红外光谱,1 H和19 F NMR光谱以及质谱对化合物进行了表征。