alkylthiolation of alkenes, initiated by dimethyl(methylthio)sulfonium salts and the subsequent addition of various heteronucleophilies has been well-established. Regarding the use of carbon nucleophiles, however, only carefully designed sp-type carbon sources have been successfully applied. We herein present our findings on the methylthiolation of alkenes with dimethyl(methylthio)sulfonium trifluoromethanesulfonate
作者:Mark W. Campbell、Mingbin Yuan、Viktor C. Polites、Osvaldo Gutierrez、Gary A. Molander
DOI:10.1021/jacs.0c13077
日期:2021.3.17
small molecules is limited by the necessity of prefunctionalization to achieve chemoselective reactivity. Herein, we report the implementation of efficient, sustainable, diaryl ketone hydrogen-atomtransfer (HAT) catalysis to activate native C–H bonds for multicomponent dicarbofunctionalization of alkenes. The ability to forge new carbon–carbon bonds between reagents typically viewed as commodity solvents
Nonfluorous, Highly CO<sub>2</sub>-soluble Chelating Ligands for scCO<sub>2</sub>Metal Ion Extraction
作者:Hai-Jian Yang
DOI:10.1246/cl.2006.1000
日期:2006.9
A series of new nonfluorous chelating ligands derived from glucose have been designed and synthesized. All compounds are highly soluble in liquid or supercritical carbon dioxide. Solubility trend of these chelating compounds would be rationalized by the inductive effect of substituent on the benzene ring and the easy accessibility of benzylic ether oxygen and neighboring hydrogens. Preliminary metal ion extraction efficiency test showed that all our compounds are selective for Sr2+ and Pb2+ extraction.
Convenient oxidative debenzylation using dimethyldioxirane
作者:René Csuk、Petra Dörr
DOI:10.1016/s0040-4020(01)89613-7
日期:1994.1
Substituted benzyl ethers are easily cleaved by their treatment with an excess of dimethyldioxirane, the corresponding alcohols are obtained in high yields.