应用化学 ›› 2009, Vol. 26 ›› Issue (07): 845-847.

• 研究简报 • 上一篇    下一篇

6,7-二乙酰氧基黄芩素的一步合成、选择性水解及甲醚化

朱洪友1,蒋明忠2,雷泽3,木晓云3,付正启3,温晓江3,孔兰芬4   

  1. 1. 云南大学化学科学与工程学院
    2. 云南大学教育部自然资源药物化学重点实验室,云南警官学院
    3. 昆明云大医药开发有限公司
    4. 云南大学教育部自然资源药物化学重点实验室
  • 收稿日期:2008-07-14 修回日期:2008-10-13 出版日期:2009-07-10 发布日期:2009-07-10
  • 通讯作者: 朱洪友
  • 基金资助:
    云南省自然科学基金(2003C009M)

One-step Synthesis, Selective hydrolysis and Methoxylation of 6,7-Diacetoxylbaicalein

  • Received:2008-07-14 Revised:2008-10-13 Published:2009-07-10 Online:2009-07-10

摘要: 以中药黄芩中的主要活性成分黄芩苷为原料,在醋酸钾、吡啶催化回流条件下,用醋酐为乙酰化试剂,以67.6%的收率一步实现了6,7-二乙酰氧基黄芩素的合成,6,7-二乙酰氧基黄芩素经K2CO3/丙酮-水条件下的水解反应或Me2SO4/K2CO3/丙酮中的甲醚化反应以良好收率及高选择性得到6-乙酰氧基黄芩素或7-甲氧基-6-乙酰氧基黄芩素.

关键词: 黄芩苷, 6,7-二乙酰氧基黄芩素, 选择性水解, 甲醚化

Abstract: 6,7-diacetoxylbaicalein has been synthesized in 67.7% yield by the CH3COOK/Py catalyzed direct acetylation of baicalin, the main active component of Chinese herb Scutellaria baicalensis Georgi, with acetic anhydride at reflux, the monoacetylated derivative 6-acetoxyl baicalein or the mono-O-methylated derivative 6-acetoxy-7-methoxylbaicalein has been prepared in excellent yields from 6,7-diacetoxylbaicalein through the high selective hydrolysis reaction in the presence of K2CO3/acetone-H2O or methoxylation reaction at the C-7 position with Me2SO4 .

Key words: baicalin, 6,7-diacetoxylbaicalein, selective hydrolysis, methoxylation