Highly Efficient and Chemoselective Tertiary and Secondary Benzylation of Thiols Catalyzed by Indium(III) Triflate
作者:Krzysztof Kuciński、Grzegorz Hreczycho
DOI:10.1002/ejoc.201701007
日期:2017.10.10
We have developed a highly efficient method for the chemoselective nucleophilicsubstitution of tertiary and secondary benzylic alcohols with aliphatic and aromatic thiols in the presence of catalytic amounts of indium(III) triflate under mild conditions. A broad range of unsymmetrical sulfides were synthesized in excellent isolated yields (89–99 %) by using this approach.
Pd-Catalyzed Alkenyl Thioether Synthesis from Thioesters and <i>N</i>-Tosylhydrazones
作者:Kota Ishitobi、Kei Muto、Junichiro Yamaguchi
DOI:10.1021/acscatal.9b04212
日期:2019.12.6
A Pd-catalyzed alkenyl thioethersynthesis was achieved using thioesters and N-tosylhydrazones as starting materials. The thioester acted as an efficient “sulfur source” for catalytic C–S bond formation using N-tosylhydrazone. This method gave Z-alkenyl thioethers with high diastereoselectivity (up to 99:1 diastereomeric ratio). This transformation displayed a wide functional group tolerance and was
Molybdenum (VI)-catalyzed dehydrative construction of C O and C S bonds formation via etherification and thioetherification of alcohols and thiols
作者:Rahulkumar Rajmani Singh、Alex Whittington、Radhey S. Srivastava
DOI:10.1016/j.mcat.2020.110954
日期:2020.8
environmentally benign, and efficient catalyst molybdenum(VI) dioxo (acetylacetonate)2 was used for the direct oxo- and thioetherification of alcohol. This method endures selective molybdenum catalyzed dehydrative synthesis of symmetrical ethers from benzylic secondary alcohols as well as unsymmetrical ethers from the reaction of benzylic secondary alcohols with primary alcohol. Furthermore, we have been also successful
TITANIUM TETRACHLORIDE PROMOTED REDUCTION OF ALKENYL SULFIDES USING TRIETHYLSILANE AS A REDUCING AGENT
作者:Takeshi Takeda、Toshio Tsuchida、Tooru Fujiwara
DOI:10.1246/cl.1984.1219
日期:1984.7.5
Alkenyl sulfides were reduced to the corresponding alkyl sulfides with triethylsilane in the presence of titanium tetrachloride in good yields. The reduction proceeds via -phenylthioalkyltitanium i...