第 45 卷第 5 期 |  | Vol. 45 No. 5 | 2015 年 10 月 | Oct 2015 |
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所属栏目:医药及中间体
7-苯乙酰氨基-3-(丙-1-烯基)-3-头孢烯-4-羧酸-4-甲氧基苄酯合成的Wittig反应研究 |
王宗利,侯仲轲*,张宜仲,吕秋波,田黎黎,刘 冲
(浙江国邦药业有限公司,浙江 上虞 312369) |
摘 要:以7-苯乙酰胺基-3-氯甲基头孢烷酸对甲氧基苄酯(GCLE)为原料合成了7-苯乙酰氨基-3-(丙-1-烯基)-3-头孢烯-4-羧酸-4-甲氧基苄酯(GPRE),并对Wittig反应进行了研究。结果标明:氯化锂存在时,在v(二氯甲烷/mL)∶v(N,N-二甲基乙酰胺/mL)∶w(Wittig试剂/g)=3∶2∶1、反应温度-10℃的条件下,GPRE Z、E比值超过13.5,主峰(Z+E)超过97.0%。 |
关键词:GCLE;GPRE;Wittig反应 |
中图分类号:TQ465 文献标识码: 文章编号:1009-9212(2015)05-0042-04 |
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Study on the Wittig Reaction in the Preparation of GPRE |
WHANG Zong-li, HOU Zhong-ke*, ZHANG Yi-zhong, L?譈 Qiu-bo, TIAN Li-li, LIU Chong
(Zhe Jiang Guo Bang Pharmaceutical Co., Ltd., Shangyu 312369, China) |
Abstract:This paper reported the Wittig reaction using(6R-trans)-5-Thia-l-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid, 3-chloromethyl-8-oxo-7-[(phenylacetyl)amino]-diphenylmethyl ester(GCLE) as the raw material for the synthesis of 4-methoxybenzyl-7-phenylacetamido-3-(propen-1-alkenyl)-3-cephem-4-carboxylate (GPRE). The results indicated that the Z/E value of GPRE was greater than 13.5, and the Z+E value is greater than 97.0% under the following reaction conditions: Lithium chloride was used as the catalyst; the ratio of dichloromethane to N,N-dimethylacetamide (both in volume) and to Wittig reagent (weight) was 3:2:1; the reaction temperature was of -10℃. |
Key words:GCLE; GPRE; Wittig reaction |
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作者简介:王宗利(1977-),男,江苏睢宁人,工程师,主要从事药物中间体的合成与研究(E-mail:jianqiu21@sina.com)。
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联 系 人: 侯仲轲,研究员,主要从事药物中间体的合成与研究(E-mail:houzk2008@hotmail.com)。
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收稿日期: 2015-09-1
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