第 45 卷第 1 期 | | Vol. 45 No. 1 | 2015 年 2 月 | Feb 2015 |
|
所属栏目:农药及中间体
2-氰基-2,2-二(4-氯苄基)乙酸乙酯的合成研究 |
田宗明,秦永华,张 斌,金小平
(浙江医药高等专科学校 生物与制药学院,浙江 宁波 315100) |
摘 要:以4-氯甲苯为原料,二氯甲烷为溶剂,室温下,用三氯化硼氯化甲基侧链合成4-氯氯苄,收率55.3%;乙醇钠催化下,物料配比 n(4-氯氯苄)∶n(丙二腈)=2.0∶1.0,反应合成2,2-二(4-氯苄基)丙二腈,收率51.2%;有水的条件下,二氯亚砜催化,乙醇醇解2,2-二(4-氯苄基)丙二腈合成2-氰基-2,2-二(4-氯苄基)乙酸乙酯,收率62.9%。产物结构经IR、1H NMR及X单晶结构衍射确证。 |
关键词:乙酸乙酯;4-氯苄基;丙二腈 |
中图分类号:O622.2 文献标识码:A 文章编号:1009-9212(2015)01-0019-05 |
|
Synthesis of 2-Cyano-2, 2-bis(4-fluorobenzyl)ethyl Acetate |
TIAN Zong-ming, QIN Yong-hua, ZHANG Bin, JIN Xiao-ping
(Zhejiang Pharmaceutical College, Ningbo 315100, China) |
Abstract:A yield of 55.3% for the preparation of 4-chloromethylbenzyl chloride was achieved using 4-chloro-toluene as the raw material, boron trichloride as the chlorination agent at room temperature. Then, 4-Chlorobenzyl chloride was reacted with malononitrile to give 2,2-bis(4-chlorobenzyl)malononitrile, and a yield of 51.2% was obtained at 4-Chloro benzyl chloride/malononitrile ratio of 2.0:1.0 using sodium ethoxide as catalyst. At the presence of water and thionyl chloride as the catalyst, a yield of 62.9% for 2-cyano-2,2-bis(4-chloridebenzyl)ethyl acetate was achieved using ethanol alcoholization reaction of 2,2-bis(4-chlorobenzyl)malononitrile, and the molecular structure of this product was characterized using IR, 1H NMR and X-ray diffraction. |
Key words:ethyl acetate; 4-fluorobenzyl; malononitrile |
|
基金项目:浙江省自然科学基金(LQ13B010004),浙江医药高等专科学校科研项目(ZPCSR2011006)。
|
作者简介:田宗明(1978-),男,湖北宣恩人,讲师,硕士,研究方向:药物及中间体合成(E-mail:tzmming@163.com)。
|
收稿日期: 2014-11-1
|
|