Chinese Journal of Organic Chemistry ›› 2023, Vol. 43 ›› Issue (3): 1177-1186.DOI: 10.6023/cjoc202208034 Previous Articles     Next Articles

Special Issue: 中国女科学家专辑

ARTICLES

纯水及空气中芳香羧酸和丙烯酸酯氧化偶联构筑苯酞的绿色方法

魏文婷, 李壮壮, 李婉迪, 李嘉琪, 石先莹*()   

  1. 陕西师范大学化学化工学院 陕西省合成气转化重点实验室 西安 710119
  • 收稿日期:2022-08-25 修回日期:2022-10-12 发布日期:2022-11-07
  • 通讯作者: 石先莹
  • 基金资助:
    国家自然科学基金(22178214); 国家自然科学基金(21776171)

Green Method for Constructing Phthalides via Oxidative Coupling of Aromatic Acids and Acrylates in Neat Water and Air

Wenting Wei, Zhuangzhuang Li, Wandi Li, Jiaqi Li, Xianying Shi()   

  1. Key Laboratory of Syngas Conversion of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119
  • Received:2022-08-25 Revised:2022-10-12 Published:2022-11-07
  • Contact: Xianying Shi
  • Supported by:
    National Natural Science Foundation of China(22178214); National Natural Science Foundation of China(21776171)

Phthalides represent an important class of bioactive heterocycle extensively found in pharmaceuticals and natural products, their syntheses have attracted extensively attention. A water-promoted and rhodium-catalyzed [3+2] tandem cyclization of aromatic acids and acrylates has been developed in air and neat water free of any additives, which provides an environmentally benign approach for constructing phthalide motifs. Compared with previous literatures, this methodology features quite simple reaction conditions, simple operation and additive-free. Mechanistic studies indicate that apart from the many other well-known oxidations of Rh(I) by external oxidant, hydrogen transfer with the acrylate being a hydrogen acceptor is involved to regenerate the active Rh species, which is different from documented metal-catalyzed phthalides syntheses. The application of this protocol is further demonstrated by the green synthesis of biologically active isoochracinic acid in one step.

Key words: on water reaction, tandem cyclization, oxidative coupling, phthalides