Chinese Journal of Organic Chemistry ›› 2022, Vol. 42 ›› Issue (1): 172-180.DOI: 10.6023/cjoc202107038 Previous Articles     Next Articles

ARTICLES

Rh(III)催化偶氮苯与碳酸亚乙烯基酯的环化反应

张文杰a, 李超a, 王博超a, 高慧a,b,*(), 李洪基a,*()   

  1. a 淮北师范大学化学与材料科学学院 教育部绿色和精准合成化学及应用重点实验室 安徽淮北 235000
    b 广西师范大学 省部共建药用资源化学与药物分子工程国家重点实验室 广西桂林 541004
  • 收稿日期:2021-07-18 修回日期:2021-09-16 发布日期:2021-09-26
  • 通讯作者: 高慧, 李洪基
  • 基金资助:
    国家自然科学基金(21772061); 安徽省高校优秀人才(gxyq2020015); 省部共建药用资源化学与药物分子工程国家重点实验室(广西师范大学)(CMEMR2021-B14)

Rh(III)-Catalyzed Annulation of Azobenzenes with Vinylene Carbonate

Wenjie Zhanga, Chao Lia, Bochao Wanga, Hui Gaoa,b(), Hongji Lia()   

  1. a Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education, School of Chemistry and Materials Science, Huaibei Normal University, Huaibei, Anhui 235000
    b State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Guangxi Normal University, Guilin, Guangxi 541004
  • Received:2021-07-18 Revised:2021-09-16 Published:2021-09-26
  • Contact: Hui Gao, Hongji Li
  • Supported by:
    National Natural Science Foundation of China(21772061); Research Funding for Outstanding Young Talents in Colleges and Universities of Anhui Province(gxyq2020015); State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources (Guangxi Normal University)(CMEMR2021-B14)

A mild Rh(III)-catalyzed annulation of azobenzenes with vinylene carbonate via inert C—H bond activation has been developed. In this reaction system, vinylene carbonate provides one vinyl carbon for the construction of indazole backbone, and leaves the other one for the formation of aldehyde. This annulation enables the direct synthesis of 2H-indazole- 3-carbaldehyde with excellent regioselectivity in moderate to good yields.

Key words: Rh catalysis, azobenzene, vinylene carbonate, annulation