Chin. J. Org. Chem. ›› 2008, Vol. 28 ›› Issue (03): 511-514. Previous Articles     Next Articles

Reports

奈必洛尔的不对称合成

余婧,张稳稳,李映红,李盛男,何菱*   

  1. (四川大学华西药学院 靶向药物教育部重点实验室 成都 610041)
  • 收稿日期:2007-03-28 修回日期:2007-08-22 发布日期:2008-03-18
  • 通讯作者: 何菱

Asymmetric Synthesis of Nebivolol

YU Jing,ZHANG Wen-Wen,LI Ying-Hong,LI Sheng-Nan,HE Ling*   

  1. (Key Laboratory of Drug-Targeting, Ministry of Education, West China School of Pharmacy, Si-chuan University,
    Chengdu 610041)
  • Received:2007-03-28 Revised:2007-08-22 Published:2008-03-18
  • Contact: HE Ling

The convenient enantioselective synthesis of nebivolol (1) was described. The key steps of this total synthesis were based on a Sharpless asymmetric epoxidation methodology employing 4-fluoro-2-(5- hydroxypent-3-enyl)phenol (2) as a substrate and the efficient formation of (2S,1R)-2-(2-amino-1-hydroxy ethyl)-6-fluorochroman (6) and (R,R)-6-fluoro-2-oxiranyl-chroman (10). Simultaneously, the approach was inves-tigated for the nucleophilic ring opening of epoxide 10. Finally, 10 was afforded in an ex-cellent yield and the ring cleavage of 10 led to the formation of 1 in a 14.1% overall yield over steps after optimization of the steps which accompanied a 2.1% overall yield in literature.

Key words: Sharpless asymmetric epoxidation, nebivolol, hypertensive agent