Chin. J. Org. Chem. ›› 2015, Vol. 35 ›› Issue (7): 1500-1505.DOI: 10.6023/cjoc201501036 Previous Articles     Next Articles



张小祥, 孙小萍, 饶卫东   

  1. 南京林业大学化工学院 江苏省生物质绿色燃料与化学品重点实验室 南京 210037
  • 收稿日期:2015-01-27 修回日期:2015-03-06 发布日期:2015-03-17
  • 通讯作者: 张小祥, 饶卫东;
  • 基金资助:

    国家自然科学青年基金(No. 21302096)、江苏省自然科学青年基金(No. BK20130962)、江苏高校优势学科建设工程资助项目.

Triflic Acid-Catalyzed Tandem Reactions of Cyclopropyl Alcohols with Sulfonamides for the Synthesis of Pyrrolidines

Zhang Xiaoxiang, Sun Xiaoping, Rao Weidong   

  1. College of Chemical Engineering, Jiangsu Key Laboratory of Biomass-based Green Fuels and Chemicals, Nanjing Forestry University, Nanjing 210037
  • Received:2015-01-27 Revised:2015-03-06 Published:2015-03-17
  • Supported by:

    Project supported by the Young National Natural Science Foundation of China (No. 21302096), the Young Natural Science Foundation of Jiangsu Province (No. BK20130962) and the Project Fund from the Priority Academic Program Development of Jiangsu Higher Education Institutions.

Intermolecular tandem reactions of substituted cyclopropyl alcohols with sulfonamides for the synthesis of pyrrolidines can be catalyzed by triflic acid (TfOH). The desired pyrrolidines were provided in yields of 16%~83% with 10 mol% catalyst loadings at 100 ℃. A variety of cyclopropyl alcohols, such as the electron-withdrawing, electron-donating and bulkyl groups on aromatics, and sulfonamide with electron-withdrawing, and electron-donating substituents, could be tolerated under the optimized reaction conditions. An inexpensive and commercially available triflic acid reagent has been shown efficient for the synthesis of pyrrolidines, which is an alternative to metal-catalyzed reactions.

Key words: TfOH-catalyzed, cyclopropyl alcohols, sulfonamides, tandem reactions, pyrrolidines