1-Trifluoromethylvinyl vinyl ketones are treated with trimethylsilyl trifluoromethanesulfonate in CH2Cl2-1,1,1,3,3,3-hexafluoro-2-propanol to afford 5-trifluoromethyl-2-cyclopentenones. Both acyclic and cyclic substrates furnish the corresponding cyclized products in good to excellent yields with defined placement of the endocyclic double bond due to the strong electronic effect exerted by the trifluoromethyl group.
Martin,G.J.; Daviaud,G., Bulletin de la Societe Chimique de France, 1970, p. 3098 - 3102
作者:Martin,G.J.、Daviaud,G.
DOI:——
日期:——
Highly Enantioselective γ-Amination of α,β-Unsaturated Acyl Chlorides with Azodicarboxylates: Efficient Synthesis of Chiral γ-Amino Acid Derivatives
作者:Li-Tao Shen、Li-Hui Sun、Song Ye
DOI:10.1021/ja206819y
日期:2011.10.12
The cinchona alkaloid-catalyzed gamma-amination of alpha,beta-unsaturated acyl chlorides with azodicarboxylates to give the corresponding dihydropyridazinones in good yields with high enantioselectivities has been developed. Reductive ring opening of the dihydropyridazinones afforded series of cyclic and acyclic gamma-amino acid derivatives in good yields with high enantiopurity.
Dehydrogenative Cross-Coupling of α,β-Unsaturated Compounds with Unactivated Olefins via Co(III) Catalysis
作者:Ravichandran Logeswaran、Masilamani Jeganmohan
DOI:10.1021/acs.orglett.3c02095
日期:2023.9.1
β-unsaturated compounds with unactivated alkenes via cobalt-catalyzed vinylic C–H activation has been developed. The present catalytic reaction was examined with various differently functionalized unsaturated compounds and unactivated olefins. In these reactions, highly valuable amide functionalized butadienes and indenones were prepared in good to excellent yields. A possible reaction mechanism is proposed