Page 146 - 《精细化工》2022年第6期
P. 146
第 39 卷第 6 期 精 细 化 工 Vol.39, No.6
2022 年 6 月 FINE CHEMICALS June 2022
医药与日化原料
酶促酯化拆分-化学消旋串联法制备(S)-布洛芬
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雷高乙,李红霞,陈中胜,乐长高 ,谢宗波
(东华理工大学 江西省合成化学重点实验室,江西 南昌 330013)
摘要:以(±)-布洛芬为原料、南极假丝酵母脂肪酶 B(CALB)为催化剂,通过对映选择性酯化反应拆分布洛芬,
对醇的种类及用量、反应介质、底物物质的量比、酶用量、干燥剂种类及添加量、温度、时间进行了优化。在
1 mL 环己烷、0.0206 g(0.1 mmol)(±)-布洛芬、0.0444 g(0.6 mmol)异丁醇、添加量为 40 g/L 5A 分子筛、15 mg
CALB、温度 60 ℃、时间 48 h 的条件下,以 56%的收率、100%的对映体过量值得到了纯的(S)-布洛芬。接着对
上述拆分时生成的(R)-布洛芬异丁酯进行酸性水解;然后以二异丙基氨基锂为催化剂,对水解生成的(R)-布洛芬
进行化学消旋得到(±)-布洛芬,再进行酶促酯化拆分。该酶促酯化拆分-化学消旋串联法可循环进行多次,从而
提高(±)-布洛芬的利用率。
关键词:(S)-布洛芬;消旋;二异丙基氨基锂;酶促酯化拆分;医药原料
中图分类号:TQ460.1 文献标识码:A 文章编号:1003-5214 (2022) 06-1212-07
Preparation of (S)-ibuprofen by enzymatic esterification
resolution-chemical racemization tandem method
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LEI Gaoyi, LI Hongxia, CHEN Zhongsheng, LE Zhanggao , XIE Zongbo
(Jiangxi Province Key Laboratory of Synthetic Chemistry, East China University of Technology, Nanchang 330013,
Jiangxi, China)
Abstract: The resolution of ibuprofen by enantioselective esterification was explored using (±)-ibuprofen
as raw material and Candida antarctica lipase B (CALB) as catalyst. The influence of type and dosage of
alcohol, reaction medium, molar ratio of substrates, dosage of enzyme, type and dosage of desiccant,
reaction temperature and time on enantioselectivity were studied and optimized. Pure (S)-ibuprofen was
obtained with a yield of 56% and an enantiomer excess value of 100% under the conditions of 1 mL
cyclohexane, 0.0206 g (0.1 mmol) (±)-ibuprofen, 0.0444 g (0.6 mmol) isobutanol, additive amount of
40 g/L 5A molecular sieve as desiccant, 15 mg CALB, 60 ℃ and 48 h. Furthermore, (R)-ibuprofen was
obtained through acid hydrolysis of (R)-ibuprofen isobutyl ester generated during the above resolution, and
recycled to produce more (±)-ibuprofen as raw material for next enzymatic resolution reaction by chemical
racemization using lithium diisopropylamide as catalyst. This enzymatic esterification resolution-chemical
racemization tandem method could be cycled multiple times, and improve the utilization rate of (±)-ibuprofen.
Key words: (S)-ibuprofen; racemization; lithium diisopropylamide; enzymatic esterification resolution;
drug materials
布洛芬为芳基丙酸类非甾体抗炎药,可以抑制 严重的副作用,如胃肠道疼痛 [7-11] 。目前,单一(S)-
前列腺素合成,具有解热镇痛及抗炎等作用 [1-2] 。布 布洛芬市场日益扩大,如何获得单一(S)-布洛芬已成
洛芬分子中存在一个手性中心,手性环境对生物活 为研究热点,人们开发了多种手性技术来生产光学
性物质有重要影响 [3-6] 。药理实验表明,主要由(S)- 纯(S)-布洛芬药物 [12] 。
布洛芬表现出预期的生理效果,而(R)-布洛芬会导致 获得单一(S)-布洛芬的主要方法是手性拆分,酶
收稿日期:2021-11-12; 定用日期:2022-02-10; DOI: 10.13550/j.jxhg.20211153
作者简介: 雷高乙(1998—),男,硕士生,E-mail:1379572433@qq.com。联系人:乐长高(1967—),男,教授,E-mail:zhgle@ecut.edu.cn;
谢宗波(1978—),男,教授,E-mail:zbxie@ecut.edu.cn。