Intermolecular CO-retained carbothiolation of alkynes using thioesters took place to afford beta-SR substituted enone derivatives; the choice of catalyst (Pd(dba)(2)-dppe) and the introduction of a CF(3) group into the thioesters are the key to achieving the transformation.
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.
NGUYEN THOAI; WAKSELMAN C., J. FLUOR. CHEM., 35,(1987) N 3, 523-530
作者:NGUYEN THOAI、 WAKSELMAN C.
DOI:——
日期:——
SVIRSKAYA P. I.; LEZNOFF C. C.; STEINMAN M., J. ORG. CHEM., 52,(1987) N 7, 1362-1364
作者:SVIRSKAYA P. I.、 LEZNOFF C. C.、 STEINMAN M.
DOI:——
日期:——
Organotitanium Nucleophiles in Asymmetric Cross-Coupling Reaction: Stereoconvergent Synthesis of Chiral α-CF<sub>3</sub> Thioethers
作者:Andrii Varenikov、Mark Gandelman
DOI:10.1021/jacs.9b05671
日期:2019.7.17
Ni-catalyzed cross-couplingreactions have become a very attractive tool for the stereoselective construction of valuable organic chiral materials. While various nucleophiles are used in such transformation, organotitanium (IV) has not been used before. Herein we demonstrate, for the first time, that organotitanium species can serve as efficient coupling partners in asymmetric cross-couplings, which have