A general strategy for the hydroalkylation of vinyl ketones using ethers catalyzed by an iron catalyst is described. This catalytic method permits direct transformation of easily accessible and abundant precursors into highly substituted, structurally diverse and functionally concentrated products.
ketones are generated in moderate yields (50–60%) from allene or a mono-, di- or tri-substitutedallenic hydrocarbon, n alkyl halide and sodium tetracarbonylferrate. The first step is the formation of a complex anion which results from transfer of the alkyl group on a coordinated CO, then of the acyl ligand thus formed on the allenic sp carbon. Protonation with acetic acid yields a hydroxy-η4-trimethylenemethane
Insertion d'allene dans une liaison fer-acyle. Formation de cetones α,β-insaturees a partir du tetracarbonyl ferrate de sodium
作者:A. Guinot、P. Cadiot、J.L. Roustan
DOI:10.1016/s0022-328x(00)90144-x
日期:1977.3
Disodium tetracarbonylferrate(−II) reacts with alkyl bromides and allene to yield α,β-unsaturated ketones. It is suggested that the reaction proceeds throughinsertion of “allene” into an ironacyl bond to yield an anionic intermediate which gives a π-heterobutadiene complex after protonation. Oxydation with trimethylamine oxide ultimately yields the ketone.
[EN] GLYCINE B ANTAGONISTS<br/>[FR] ANTAGONISTES DE LA GLYCINE B
申请人:MERZ PHARMA GMBH & CO KGAA
公开号:WO2010139483A1
公开(公告)日:2010-12-09
The invention relates to pyrazolopyrimidine derivatives as well as their pharmaceutically acceptable salts. The invention further relates to a process for the preparation of such compounds. The compounds of the invention are glycine B antagonists and are therefore useful for the control and prevention of various disorders, including neurological disorders.
Another Role of Copper in the Simmons–Smith Reaction: Copper-catalyzed Nucleophilic Michael-type Cyclopropanation of α,β-Unsaturated Ketones
作者:Kanami Fujii、Tomonori Misaki、Takashi Sugimura
DOI:10.1246/cl.131193
日期:2014.5.5
Cyclopropanation was performed using the Furukawa procedure with CH2I2/Et2Zn and α,β-unsaturated ketones. The reaction was performed in the presence of a copper salt. The reactivity was highly depe...