Enantioselective copper-catalyzed allylic alkylation with dialkylzincs using phosphoramidite ligands

被引:100
|
作者
Malda, H [1 ]
van Zijl, AW [1 ]
Arnold, LA [1 ]
Feringa, BL [1 ]
机构
[1] Univ Groningen, Stratingh Inst, Dept Organ & Mol Inorgan Chem, NL-9747 AG Groningen, Netherlands
关键词
D O I
10.1021/ol0156289
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
[GRAPHICS] In the presence of a catalytic amount of copper salts, cinnamyl halides undergo a regio- and enantioselective S(N)2' alkylation with dialkylzincs using chiral phosphoramidites as ligands. An S(N)2':S(N)2 ratio of 85:15 and enantiomeric excesses up to 77% for the chiral S(N)2' products are found, Variation of solvent and reaction temperature revealed that the highest regio- and enantioselectivities are found using coordinating solvents of -40 degreesC.
引用
收藏
页码:1169 / 1171
页数:3
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