A new synthesis of thioesters and selenoesters of triflic acid under oxidative conditions
作者:Thierry Billard、Bernard R. Langlois
DOI:10.1016/s0022-1139(97)00009-2
日期:1997.8
Trifluoromethanethio-(or seleno-)sulfonates (CF3SO2YR, Y=S, Se) are easily obtained in one step at 0–20 °C from disulfides (or diselenides), sodium trifluoromethanesulfinate and [bis-(trifluoroacetoxy)iodo]benzene (BTIB).
三氟甲硫基(或硒代)磺酸盐(CF 3 SO 2 YR,Y = S,Se)易于在0–20°C的一步中由二硫化物(或二硒化物),三氟甲亚磺酸钠和[双-(三氟乙酰氧基)碘]制得。苯(BTIB)。
Stereoselective formation of tetrahydrofuran and -pyran by benzeneselenenyl triflate
作者:Shizuaki Murata、Toshiyasu Suzuki
DOI:10.1016/s0040-4039(00)96525-0
日期:——
Synthetic Uses of Thio- and Selenoesters of Trifluoromethylated Acids. 1. Preparation of Trifluoromethyl Sulfides and Selenides
作者:Thierry Billard、Nicolas Roques、Bernard R. Langlois
DOI:10.1021/jo980649a
日期:1999.5.1
Trifluorothioacetates (CF3CO-S-R, from (CF3CO)(2)O and thiols) as well as trifluoromethanethio-or trifluoromethaneselenosulfonates (CF3SO2-Y-R; Y = S, Se; from CF3SO2Na, RYYR, and Br-2) can be formally decarbonylated or desulfonylated, respectively, provided that they are photolyzed at 40 degrees C in the presence of 1 equiv of the corresponding disulfide or diselenide. Trifluoromethyl sulfides or selenides are obtained, and the added disulfide (or diselenide) is recovered after reaction. In such a way, S-(trifluoromethyl)cysteine derivatives can be obtained.
A New Route to Thio- and Selenosulfonates from Disulfides and Diselenides. Application to the Synthesis of New Thio- and Selenoesters of Triflic Acid
作者:Thierry Billard、Bernard R. Langlois、Sylvie Large、Daniel Anker、Nathalie Roidot、Philippe Roure
DOI:10.1021/jo960619c
日期:1996.1.1
Alkyl and aryl trifluoromethanethiosulfonates(1) (or selenosulfonates) were prepared in one step either from alkyl and aryl sulfenyl (or selenenyl) chlorides and sodium trifluoromethanesulfinate (3) or, more generally, from disulfides (or diselenides), 3, and bromine. The second method involved trifluoromethanesulfonyl bromide as key intermediate. Benzenethiosulfonates were obtained in a similar way from disulfides, benzenesulfinate, and bromine but benzeneselenosulfonates could not be obtained by the same method from diselenides.
Addition of trifluoromethanethio- and trifluoromethaneseleno-sulfonates to olefins. Synthesis of vinyl triflones
作者:Thierry Billard、Bernard R Langlois
DOI:10.1016/s0040-4020(99)00421-4
日期:1999.6
trifluoromethaneselenosulfonates are strong electrophilic reagents which add rapidly to olefins to deliver β-sulfenyl and β-selenyl triflones. These products are converted in high yields to vinyl triflones by different techniques under mild conditions. This two-step procedure is an efficient route to vinyl triflones from non-functionalized olefins.