Chinese Journal of Organic Chemistry ›› 2022, Vol. 42 ›› Issue (11): 3805-3815.DOI: 10.6023/cjoc202205021 Previous Articles     Next Articles

ARTICLES

P(NMe2)3介导1,2-二羰基化合物与α,β-不饱和酮的[1+4]环化反应及多取代2,3-二氢呋喃的合成

薛飞雪a, 曾建伟a, 严泰山a, 韩杰a,*(), 贺峥杰a,b,*()   

  1. a南开大学化学学院 元素有机化学国家重点实验室 天津 300071
    b天津化学化工协同创新中心 天津 300071
  • 收稿日期:2022-05-16 修回日期:2022-07-05 发布日期:2022-07-13
  • 通讯作者: 韩杰, 贺峥杰
  • 基金资助:
    国家自然科学基金(21472096); 国家自然科学基金(22171143)

Synthesis of Polysubstituted 2,3-Dihydrofurans via P(NMe2)3- Mediated [1+4] Annulation of 1,2-Dicarbonyl Compounds with α,β-Unsaturated Ketones

Feixue Xuea, Jianwei Zenga, Taishan Yana, Jie Hana(), Zhengjie Hea,b()   

  1. aState Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071
    bCollaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071
  • Received:2022-05-16 Revised:2022-07-05 Published:2022-07-13
  • Contact: Jie Han, Zhengjie He
  • Supported by:
    National Natural Science Foundation of China(21472096); National Natural Science Foundation of China(22171143)

A [1+4] annulation of 1,2-dicarbonyl compounds with α,β-unsaturated ketones has been readily realized under the mediation of P(NMe2)3, producing polysubstituted 2,3-dihydrofurans bearing a quaternary carbon center in fair to good yields with a broad substrate scope. This reaction accordingly constitutes a new synthetic method for such compounds. In some cases, a [1+2] annulation reaction competitively occurs, delivering polysubstituted cyclopropanes. With the aid of density functional theory (DFT) calculation, a plausible mechanism for the [1+4] annulation and the chemoselectivity between [1+2] and [1+4] annulations has been discussed.

Key words: 1+4] annulation, 1,2-dicarbonyl compounds, [1+2] annulation, 2,3-dihydrofuran, Kukhtin-Remirez adduct