化学学报 ›› 1992, Vol. 50 ›› Issue (9): 918-923. 上一篇    下一篇

研究论文

有序介质中二苯甲酰甲烷的酮醇互变异构

江云宝;叶浓   

  1. 厦门大学化学系
  • 发布日期:1992-09-15

Keto-enol tautomerism of dibenzoylmethane in organized media

JIANG YUNBAO;YE NONG   

  • Published:1992-09-15

用紫外光谱研究了三苯甲酰甲烷在β-环糊精及离子型和非离子型胶束介质中的酮醇互变异构性质,β-环糊精的引入或胶束的形成使酮醇异构平衡向烯醇式方向移动.结果表明,用二苯甲酰甲烷的酮醇互变异构性质能够表征有序介质的微环境性质,确定表面活性物质的临界胶束浓度.

关键词: 紫外分光光度法, 环糊精, 互变异构, 二苯甲酰甲烷, 胶束浓度

The aldol reaction of cyclopent-2-enone (I) with RCHO (II; Me, Et, Me2CH, decyl, Ph, PhCH2) under basic conditions has been systematically studied. E.g., reaction of I with II (R = Me2CH) gave 68% alcs. III and III (III/IV = 93/7). The obtained regio- and diastereoselectivities has been explained by structure and transition state anal.

Key words: ULTRAVIOLET SPECTROPHOTOMETRY, CYCLODEXTRIN, TAUTOMERISM, DIBENZOYL METHANE

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