高等学校化学学报 ›› 2002, Vol. 23 ›› Issue (9): 1809.

• 研究论文 • 上一篇    下一篇

2-聚苯乙烯磺酰基乙醇树脂的合成及其在海因和脲固相合成中的应用

程绍玲, 黄文强   

  1. 南开大学吸附分离功能高分子材料国家重点实验室高分子化学研究所, 天津 300071
  • 收稿日期:2001-06-08 出版日期:2002-09-24 发布日期:2002-09-24
  • 通讯作者: 黄文强(1940年出生),男,硕士,教授,博士生导师.从事功能高分子和组合化学及固相有机合成研究.
  • 基金资助:

    国家自然科学基金(批准号:20074017)资助

Synthesis of 2-Polystyrylsulfonylethanol and Its Application in Solid-phase Organic Synthesis of Hydantoins and Ureas

CHENG Shao-Ling, HUANG Wen-Qiang   

  1. State Key Laboratory of Functional Polymer Materials for Adsorption and Separation, Institute of Polymer Chemistry, Nankai University, Tianjin 300071, China
  • Received:2001-06-08 Online:2002-09-24 Published:2002-09-24

摘要: 合成了一种新型的聚合物载体——2-聚苯乙烯磺酰基乙醇,并研究其在固相有机合成中的应用.聚苯乙烯亚磺酸钠树脂(1)在相转移催化剂Bu4NI和助催化剂KI的作用下,与氯乙醇进行砜化反应,得到含羟基功能基的2-聚苯乙烯磺酰基乙醇树脂2.树脂2用Boc保护的氨基酸酯化,封闭树脂上未反应的羟基,用酸脱保护并用三乙胺中和,再与异(硫)氰酸苯酯反应生成聚合物支载的脲树脂6.树脂6用酸解脱得到了海因和硫代海因化合物.用碱处理树脂6时得到取代的脲和硫脲.优化了合成反应的全过程,探讨了树脂在酸性条件下的解脱方法.结果表明,2-聚苯乙烯磺酰基乙醇树脂易与羧基形成含酯键的连接桥,连接桥在强酸性和碱性条件下均可解脱得到产物.

关键词: 2-聚苯乙烯磺酰基乙醇, 固相合成, 海因, 硫代海因, 脲, 硫脲

Abstract: In this article a new kind of polymer-support: 2-polystyrylsulfonylethanol was prepared and used in solid-phase organic synthesis. Sodium polystyrylsulfinate resin 1 reacted with chloroethanol in the presence of phase transfer catalyst Bu4NIand KIas a cocatalyst to give 2-polystyrylsulfonylethanol resin 2 After the esterification of resin 2 with Boc-Gly, deprotection of Boc group with HCl, neutralization by Et3N, conversion of the free amino group with phenyl isocyanate or phenyl isothiocanate to urea to give urea resin 6 The urea resins 6a and 6b were cleaved with 6 mol/L HCl to obtain the hydantoin derivatives 7a and 7b in an overall yields of 29%—30%. While the resin 6 was treated with 4 mol/L NaOHthen HCl to give the urea derivatives 8a and 8b in an overall yields of 20%—21%. The whole synthesis processes were optimized by the trace of the reactions by using IRspectra. The results show that resin 2 can easily form a stable ester linker with carboxylic acids and this kind of linker can be cleaved by the use of both strong acid or dilute base.

Key words: 2-Polystyrylsulfonylethanol, Solid-phase synthesis, Hydantoin, Thiohydantoin, Urea, Thiourea

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