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钯催化苯乙烯类分子胺氟化反应研究
  • 期刊名称:化学学报 (Acta Chimica Sinia)
  • 时间:0
  • 页码:2404-2407
  • 分类:TQ246.13[化学工程—有机化工]
  • 作者机构:[1]金属有机化学国家重点实验室中国科学院上海有机化学研究所,上海200032
  • 相关基金:项目受科技部973(No.2009CB825300)、国家自然科学基金(NOS.0972175,20923005)和上海市科委(No.1IJC1415000)资助.
  • 相关项目:金属催化不饱和烃的氢胺化反应的研究
中文摘要:

报道了烯烃分子间的氧化双官能团化反应,用金属钯作为金属催化剂,三价碘为氧化剂,氟化银为氟源,磺酰胺类为亲核试剂,实现了苯乙烯的分子问胺氟化反应,得到a-F代苯乙胺类化合物;反应是经过烯烃的反马氏氮钯化得到碳钯键,再经过二价碘氧化成高价钯的中间体来形成C—F键,在分子中的特定位置引入氟原子.该反应的一个特点是选择性地得到反马氏胺氟产物.

英文摘要:

A novel palladium-catalyzed intermolecular aminofluorination of styrenes has been developed, using silver fluo- ride as the fluorine source, palladium diacetate as metal catalyst, and acetonitrile as solvent at room temperature. As regard to the mechanism, we proposed that the anti-Markovnikov aminopalladation was involved in the construction of C--N bond. This Selectivity of nucleophilic palladation of styrenes is different from that reported before. In order to verify our proposed mechanism, we conducted the competition experiments using styrenes containing different functional groups. The results are consistent with our analysis. We belive that the C--F bond is formed after the Pd(II)-C is oxidized to Pd(IV)-C. Namely, the high oxidative state palladium is involved in catalytic cycle. In all, this transformation represents a novel strategy to synthe- size a variety of vicinal fluoroamine derivatives.

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