Regiocontrol in palladium-catalysed allylic alkylation by addition of lithium iodide
作者:Motoi Kawatsura、Yasuhiro Uozumi、Tamio Hayashi
DOI:10.1039/a707652e
日期:——
Regioselectivity in the palladium-catalysed allylic alkylation of 1-arylprop-2-enyl acetates [ArCH(OAc)CHCH2] or (E)-3-phenylprop-2-enyl acetate (PhCHCHCH2OAc) with sodium enolates of soft carbon nucleophiles is controlled by addition of a catalytic amount of lithium iodide to give lienar products [(E)-ArCHCHCH2Nu] exclusively; their branch isomers [ArCH(Nu)CHCH2] were not detected.
Copper(I) promoted CC bond forming reactions: direct activation of allyl alcohols
作者:Jubaraj.B. Baruah、Ashoka G. Samuelson
DOI:10.1016/0022-328x(89)87015-9
日期:1989.2
Allylic alcohols, acetates, carbonates and chlorides can be activated by copper(I) salts towards nucleophilic substitution by carbon nucleophiles under relatively mild conditions.
Catalytic compositions and methods for asymmetric allylic alkylation
申请人:——
公开号:US20020198383A1
公开(公告)日:2002-12-26
Complexes of a selected class of chiral ligands with molybdenum, tungsten or chromium, preferably molybdenum, are effective as catalysts in highly enantioselective and regioselective alkylation of allylic substrates.
Regio- and Enantioselective Rhodium-Catalyzed Allylic Alkylation of Racemic Allylic Alcohols with 1,3-Diketones
作者:Sheng-Biao Tang、Xiao Zhang、Hang-Fei Tu、Shu-Li You
DOI:10.1021/jacs.8b05126
日期:2018.6.20
Highly regio- and enantioselective rhodium-catalyzed allylicalkylation of 1,3-diketones with racemic secondary allylic alcohols is reported. In the presence of a Rh-catalyst derived from the Carreira (P, olefin)-ligand and TFA as an additive, chiral branched α-allylated 1,3-diketones could be obtained in good to excellent yields, with excellent regio- and enantioselectivity ( b/ l > 19/1, 86-98% ee)
Rhodium/Lewis Acid Catalyzed Regioselective Addition of 1,3-Dicarbonyl Compounds to Internal Alkynes
作者:Wei-Feng Zheng、Qiu-Jing Xu、Qiang Kang
DOI:10.1021/acs.organomet.7b00284
日期:2017.6.26
regioselective addition of 1,3-dicarbonyl compounds to internal alkynescatalyzed by rhodium/Lewisacid catalysts. The corresponding branched/linear allylic alkylation products could be selectively obtained in good yields. Rh–H species were considered to be generated by direct C–H oxidative addition of 1,3-dicarbonyl compounds with rhodium catalyst with the assistance of Lewisacid. Moreover, a retro-allylic