A CONVENIENT METHOD FOR THE SYNTHESIS OF α, β-UNSATURATED CARBONYL COMPOUNDS
作者:Teruaki Mukaiyama、Tadashi Ohsumi
DOI:10.1246/cl.1983.875
日期:1983.6.5
A variety of α,β-unsaturated ketones are conveniently synthesized from enaminoketones and organolithium compounds especially when the reaction is carried out in petroleum ether; this reaction provides a facile method for the synthesis of α,β,γ-trisubstituted 2-cyclopentenones in combination with the regioselective alkylation of enaminoketones.
Colonge; Grenet, Bulletin de la Societe Chimique de France, 1954, p. 1304,1307
作者:Colonge、Grenet
DOI:——
日期:——
SmI<sub>2</sub>-Promoted Reformatsky-Type Coupling Reactions in Exceptionally Hindered Contexts
作者:Brian A. Sparling、Ryan M. Moslin、Timothy F. Jamison
DOI:10.1021/ol800099a
日期:2008.3.1
Highly substituted, very hindered enones were synthesized using a two-step procedure that utilizes a diiodosamarium-promoted Reformatsky-type coupling and dehydration using Martin sulfurane. Both alpha-chloro- and alpha-bromoketones were coupled with a variety of carbonyl nucleophiles to form the intermediate beta-hydroxyketones, occurring with excellent diastereoselectivity, favoring the syn isomer (R-1 = Me). This technique complements other methods,and enables the preparation of enones outside of the scope of current olefination methodology.
MUKAIYAMA, TERUAKI;OHSUMI, TADASHI, CHEM. LETT., 1983, N 6, 875-878