with indiummetal, and their reactions with carbonyl compounds and electron-deficientalkenes were examined. The reactions of simple 1,1-diiodoalkanes with indiummetal gave no defined products but benzal iodide gave stilbene in a moderate yield. α-Halo organoindium reagents drived from α,α-dibromo carbonyl compounds gave oxiranes and cyclopropanes upon the reactions with aldehydes and alkenes, respectively
[2,3]-Wittig Rearrangement Initiated by 1,5-Hydrogen Atom Transfer from an<i>o</i>-Iodophenyl Group on the<i>α</i>-Carbon of Allylic Ethers by Reduction with SmI<sub>2</sub>
作者:Munetaka Kunishima、Kazuhito Hioki、Daisuke Nakata、Shigenobu Nogawa、Shohei Tani
DOI:10.1246/cl.1999.683
日期:1999.7
generated by reduction of an o-iodophenyl group on the allylic position of allyl ethers by SmI2 regioselectively generates α-allyloxy carbanions, which undergo [2,3]-Wittig rearrangement to afford a substituted 4-phenyl-3-buten-1-ol. The effect of HMPA concentration on distribution of the 1,5-hydrogen transfer giving Wittig rearranged products and hydrogen abstraction giving reductive deiodination
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
Gerard,F.; Miginiac,P., Bulletin de la Societe Chimique de France, 1974, p. 1924 - 1930
作者:Gerard,F.、Miginiac,P.
DOI:——
日期:——
Diethylzinc‐Mediated Allylation of Carbonyl Compounds Catalyzed by [(NHC)(PR
<sub>3</sub>
)PdX
<sub>2</sub>
] and [(NHC)Pd(η
<sup>3</sup>
‐allyl)Cl] Complexes
作者:Alexandre Flahaut、Krimo Toutah、Pierre Mangeney、Sylvain Roland
DOI:10.1002/ejic.200900891
日期:2009.12
reaction was investigated with this complex. [(IMesMe)(PPh3)PdI2] catalyzes the allylation of aromatic (except 4-nitrobenzaldehyde) and aliphatic aldehydes (including enolizable aldehydes) with cinnamyl acetate to give the corresponding homoallylic alcohols in 57–98 % yields and diastereoselectivities ranging from 70:30 to 92:8. The allylation of acetone also takes place under the same conditions, leading