ASYMMETRIC NUCLEOPHILIC ACYLATION WITH METALATED AMINO NITRILES - DIASTEREOSELECTIVE AND ENANTIOSELECTIVE SYNTHESIS OF 2-SUBSTITUTED 3-AROYLCYCLOHEXANONES VIA TANDEM MICHAEL ADDITION/ALPHA-ALKYLATION

被引:0
|
作者
ENDERS, D
KIRCHHOFF, J
MANNES, D
RAABE, G
机构
来源
SYNTHESIS-STUTTGART | 1995年 / 06期
关键词
ASYMMETRIC SYNTHESIS; AMINO NITRILES; NUCLEOPHILIC ACYLATION; MICHAEL ADDITION; 1,4-DIKETONES;
D O I
暂无
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
Tandem conjugate addition/alpha-alkylation of lithiated chiral alpha-amino nitriles 3 and alkyl bromides to 2-cyclohexenone afforded 2-substituted 3-aroylcyclohexanones 5 of high diastereo- and enantiomeric purity (de greater than or equal to 98 %, ee greater than or equal to 97 - greater than or equal to 99 %) and in good overall yields. The absolute configuration of the new stereogenic centres was determined by X-ray structure analysis of the Michael adduct 4c.
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页码:659 / 666
页数:8
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