A stereoselectivehypervalent iodine-promoted oxidative rearrangement of 1,1-disubstituted alkenes has been developed. This practically simple protocol provides access to enantioenriched α-arylated ketones without the use of transition metals from readily accessible alkenes.
Palladium-Assisted (Z)-(E) Isomerization of Styrenes
作者:RGF Giles、VRL Son、MV Sargent
DOI:10.1071/ch9900777
日期:——
It is shown that treatment of stereoisomeric mixtures of styrenes with a catalytic amount of bis ( acetonitrile ) dichloropalladium (II) achieves smooth stereoisomerization of the (Z)-isomers to the (E)-isomers.
Enantioselective Synthesis of All-Carbon Quaternary Stereogenic Centers via Copper-Catalyzed Asymmetric Allylic Alkylation of (<i>Z</i>)-Allyl Bromides with Organolithium Reagents
作者:Martín Fañanás-Mastral、Romina Vitale、Manuel Pérez、Ben L. Feringa
DOI:10.1002/chem.201406006
日期:2015.3.9
A copper/phosphoramidite catalyzed asymmetric allylic alkylation of Z trisubstituted allyl bromides with organolithium reagents is reported. The reaction affords all‐carbon quaternary stereogenic centers in high yields and very good regio‐ and enantioselectivity. This systematic study illustrates the crucial role of the olefin geometry of the allyl substrate on the outcome of the reaction and provides
Friedel-Crafts alkylation of benzene and toluene with olefinic C6 hydrocarbons and esters
作者:Kenneth D. Black、Frank D. Gunstone
DOI:10.1016/0009-3084(95)02517-0
日期:1996.1
To assist our study of the reaction of toluene and other aromatic compounds with methyl oleate and other olefinic esters, benzene and toluene have been alkylated under Friedel-Crafts conditions with hex-1-ene, hex-3-ene, methyl hex-3-enoate and methyl hex-3-enedioate. The products were isolated and identified by NMR and mass spectrometric procedures.