Asymmetric tricarbonyliron complexation of cyclohexadiene directed by chiral ester and amide auxiliaries

被引:5
|
作者
Ong, CW
Huang, CS
Chang, TH
机构
[1] Department of Chemistry, National Sun Yat Sen University, Kaoshiung
关键词
D O I
10.1021/om960376e
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Coupling of (+)-menthol, (+)-phenylethylamine and (-)-proline methyl ester with 4-methoxy-1-cyclohexa-2,4-dieneacetic acid gave the chiral ester 1 and amides 2 and 3, respectively, which were then isomerized into the 1,3-dienes. The diastereoselection induced by the chiral ester and amide auxiliaries during complexation with nonacarbonyliron was quite encouraging. The diastereomeric ratios of the ester- and amide-Fe(CO)(3) complexes formed were determined directly from the H-1 NMR integration of observable diastereotopic chemical shifts.
引用
收藏
页码:4334 / 4336
页数:3
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