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 preparation of trifluoromethanesulfinate salts
作者:Bernard R. Langlois、Thierry Billard、Jean-Christophe Mulatier、Catherine Yezeguelian
DOI:10.1016/j.jfluchem.2007.04.012
日期:2007.7
Trifluoromethanesulfinate (triflinate) salts can be prepared in an ecofriendly way by β-elimination of aliphatic triflones bearing an acidic hydrogen in β position. This technique allows the synthesis of various triflinate salts under mild conditions.
Synthesis of fluorine-containing 1,3-thiazine derivatives from primary polyfluoroalkanethioamides
作者:Sergiy S. Mykhaylychenko、Nadiia V. Pikun、Eduard B. Rusanov、Yuriy G. Shermolovich
DOI:10.1016/j.jfluchem.2014.09.006
日期:2014.12
New fluorine-containing 1,3-thiazine derivatives were obtained by the reactions of primary polyfluoroalkanethioamides with methyl vinyl ketone and ethyl acrylate in the presence of borontrifluoride etherate. The outcome of the reactions depends on the type of α,β-unsaturated carbonyl compound and the polyfluoroalkyl chain length. Hydrolysis of the obtained 1,3-thiazines leads to the formation of thioester