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Stereoselective Synthesis of Ambiphilic Alkenes via Regioselective Methylation of α-Trifluoromethanesulfonyl Carbonyl Compounds with Trimethylsilyldiazomethane. -Triflyl-substituted enol ethers or ketene aminals are synthesized through a selective O-methylation of the corresponding carbonyl compounds with azo compound (VI). -(KONG, H. I.; CRICHTON, J. E.; MANTHORPE*, J. M.; Tetrahedron Lett. 52 (2011) 29, 3714-3717, http://dx.doi.org/10.1016/j.tetlet.2011.05.015 ; Dep. Chem., Carleton Univ., Ottawa, Ont. K1S 5B6, Can.; Eng.) -Mais 43-081

Reactivity of α-Trifluoromethanesulfonyl Esters, Amides and Ketones: Decarboxylative Allylation, Methylation, and Enol Formation. -The influence of the α-trifluoromethanesulfonyl group on the reactivity of carbonyl compounds is studied. Allylic α,α-dialkylated esters (I) undergo decarboxylative allylation. Ketones and amides are O-methylated in the presence of trimethylsilyldiazomethane. -(KONG, H. I.; GILL, M. A.; HRDINA, A. H.; CRICHTON, J. E.; MANTHORPE*, J. M.; J. Fluorine Chem. 153 (2013) 151-161, http://dx.