Iridium-Catalyzed Coupling Reaction of Primary Alcohols with 2-Alkynes Leading to Hydroacylation Products
作者:Shintaro Hatanaka、Yasushi Obora、Yasutaka Ishii
DOI:10.1002/chem.200902646
日期:2010.2.8
A novel iridium‐catalyzed intermolecularcoupling reaction of primary alcohols or aldehydes with 2‐alkynes was successfully achieved with high regioselectivity to give hydroacylation products such as α,β‐unsaturatedketones in good yields. The mechanistic investigation of the reaction strongly indicated that the coupling proceeds through the initial formation of homoallylic alcohols followed by dehydrogenation
Catalytic Conjugate Addition of Allyl Groups to Styryl-Activated Enones
作者:Joshua D. Sieber、Shubin Liu、James P. Morken
DOI:10.1021/ja067878w
日期:2007.2.1
Conjugateaddition of pinacolato(allyl)boron to benzylidenealkylidene ketones is remarkably facile when catalyzed by Ni(0) and Pd(0) complexes. Simpleenones are inert to the reaction conditions, suggesting a significant activating effect by the auxiliary benzylidene unit. A comparison of different catalysts and substrates is provided, as is a mechanistic rationale, and an example of asymmetric catalysis
Stereoselective Synthesis of Cyclohexanones via Phase Transfer Catalyzed Double Addition of Nucleophiles to Divinyl Ketones.
作者:Andrew C. Silvanus、Benjamin J. Groombridge、Benjamin I. Andrews、Gabriele Kociok-Köhn、David R. Carbery
DOI:10.1021/jo101713d
日期:2010.11.5
Functionalized cyclohexanones are formed in excellent yield and diastereoselectivity from a phasetransfercatalyzed double addition of active methylene pronucleophiles to nonsymmetrical divinyl ketones.