高等学校化学学报 ›› 2022, Vol. 43 ›› Issue (8): 20220131.doi: 10.7503/cjcu20220131

• 物理化学 • 上一篇    下一篇

有机催化靛红衍生酮亚胺与噁唑酮的不对称Mannich型加成反应

黄秋红1, 李文军2(), 李鑫1,3()   

  1. 1.南开大学化学学院, 天津 300071
    2.青岛大学药学院药物化学系, 青岛 266021
    3.物质绿色创造与制造海河实验室, 天津 300192
  • 收稿日期:2022-03-03 出版日期:2022-08-10 发布日期:2022-03-20
  • 通讯作者: 李文军,李鑫 E-mail:liwj@qdu.edu.cn;xin_li@nankai.edu.cn
  • 基金资助:
    国家自然科学基金(22193011)

Organocatalytic Enantioselective Mannich-type Addition of 5H-Oxazol-4-ones to Isatin Derived Ketimines

HUANG Qiuhong1, LI Wenjun2(), LI Xin1,3()   

  1. 1.College of Chemistry,Nankai University,Tianjin 300071,China
    2.Department of Medicinal Chemistry,School of Pharmacy,Qingdao University,Qingdao 266021,China
    3.Haihe Laboratory of Sustainable Chemical Transformations,Tianjin 300192,China
  • Received:2022-03-03 Online:2022-08-10 Published:2022-03-20
  • Contact: LI Wenjun,LI Xin E-mail:liwj@qdu.edu.cn;xin_li@nankai.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(22193011)

摘要:

研究了手性磷酸催化的靛红衍生酮亚胺与噁唑酮的不对称Mannich型加成反应, 以良好至优秀的收率(高达97%)、 对映选择性(高达99% e.e.)以及非对映选择性(均>20∶1 d.r.)得到一系列含噁唑酮骨架的手性3,3′-二取代氧化吲哚化合物. 该反应可以进行扩大化和衍生反应.

关键词: 有机催化, 靛红衍生酮亚胺, 噁唑酮, Mannich型加成反应, 手性3,3′-二取代氧化吲哚化合物

Abstract:

Chiral 3,3′-disubstituted oxindoles are widely present in a variety of natural products and bioactive molecules. And the nature of substituents and the absolute configuration of the stereo center at the C3 position have a great effect on the bioactivities of these chiral oxindoles. Therefore, it is of great significance to develop efficient and practical methods to construct chiral 3,3′-disubstituted oxindole compounds. In particular, the enantioselective Mannich-type addition of isatin derived imines is one of the most straightforward method for forging chiral 3,3′-disubstituted oxindole compounds. Based on previous experiments, it was found that the 5H-oxazol-4-ones, which had diverse reactive sites and could be easily converted into important α-alkyl-α-hydroxy derivatives, were potential candidate nucleophile for enantioselective Mannich-type addition reaction. Herein, we reported the first chiral phosphoric acid catalyzed enantioselective Mannich-type addition reaction of isatin derived ketimines with 5H-oxazol-4-ones. Various of electron-withdrawing or electron-donating substituted isatin derived ketimines and 5H-oxazol-4-ones. Various of electron-withdrawing or electron-donating substituted isatin derived ketimines and 5H-oxazol-4-ones could be better adapt to the reaction conditions to construct chiral 3,3′-disubstituted oxindole compounds with good to excellent yields(up to 97%), enantioselectivities(up to 99% e.e.) and diastereoselectivities(all>20∶1 d.r.). What’s more, the reaction could be scaled up, and the synthetic utility of the desired chiral 3,3′-disubstituted oxindoles was proved by transformations.

Key words: Organocatalysis, Isatin derived ketimine, 5H-oxazol-4-one, Mannich-type addition reaction, Chiral 3, 3′-disubstituted oxindoles

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