Page 243 - 精细化工2019年第8期
P. 243
第 36 卷第 8 期 精 细 化 工 Vol.36, No.8
201 9 年 8 月 FINE CHEMICALS Aug. 2019
精细化工中间体
3-氨基呋咱-4-羧酸的合成
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陆婷婷,丁 峰,陈 斌,潘永飞,赵宝东,汪营磊
(西安近代化学研究所,陕西 西安 710065)
摘要:以氰基乙酸甲酯为原料,经过取代、环化成盐、水解制备 3-氨基呋咱-4-羧酸。利用红外光谱、核磁共振
波谱、元素分析及质谱确证了产物结构,并考察了物料比、反应温度、反应时间和溶剂用量对环化成盐反应的
影响及反应溶剂、pH、温度对酸化反应的影响,发现增加氢氧化钾用量、提高反应温度、降低体系 pH 有利于
目标物收率提高。得到的最佳环化成盐反应条件为∶n(盐酸羟胺)∶n(氢氧化钾)∶n(2-氰基-2-肟基乙酸甲酯)=1∶
2∶1,缩合温度 25 ℃,缩合时间 2 h,环化温度 80 ℃,环化时间 2 h,溶剂水 50 mL;最佳酸化反应条件为:
溶剂水 30 mL,pH≤1,反应温度 5 ℃,环化成盐反应和酸化反应的总收率为 79.73%,高于文献报道的 64%。
关键词:3-氨基呋咱-4-羧酸;环化成盐;酸化反应;精细化工中间体
中图分类号:TJ55; O626 文献标识码:A 文章编号:1003-5214 (2019) 08-1731-05
Synthesis of 3-Aminofurazan-4-carboxylic Acid
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LU Ting-ting, DING Feng, CHEN Bin, PAN Yong-fei, ZHAO Bao-dong, WANG Ying-lei
(Xi'an Modern Chemistry Research Institute, Xi'an 710065, Shaanxi, China)
Abstract: 3-Aminofurazan-4-carboxylic acid was synthesized from methyl cyanoacetate via substitution,
annulation-salt forming reaction and hydrolysis. The structure of the product was characterized by FTIR,
NMR and MS. The effects of molar ratio of reactants, reaction temperature, reaction time and solvent
dosage on the annulation-salt forming reaction were investigated. The effects of solvent, pH and reaction
time on the acidification reaction were also studied. It was found that increasing the dosage of potassium
hydroxide, raising the reaction temperature, and decreasing the pH value of the system were beneficial to
increasing the yield of the target product. The best annulation-salt forming reaction conditions were as
follows∶n(hydroxylamine hydrochloride)∶n(KOH)∶n〔methyl-2-cyano-2-(hydroxyimino)acetate〕=1∶
2∶1, condensation reaction temperature 25 ℃, condensation reaction time 2 h, cyclization temperature
80 ℃, reaction time 2 h, water as solvent 50 mL. The best acidification reaction conditions were that
reaction temperature 5 ℃, pH≤1 and water 30 mL. The total yield of annulation-salt forming reaction and
hydrolysis was 79.73%, higher than 64% reported in literature.
Key words: 3-aminofurazan-4-carboxylic acid; annulation-salt forming reaction; acidification reaction; fine
chemical intermediates
呋咱类化合物是一种工业上常见的杂环化合 领域,以呋咱基为爆炸基团的含能衍生物 3,4-二氨
物,在制药、医用材料、含能材料中均有广泛的应 基呋咱基氧化呋咱(DATF)和 3,4-双(4-硝基呋
用 [1-5] 。呋咱环是一类重要的 NO 供体,可用于合成 咱-3-基)氧化呋咱(DNTF)是典型的高能物质 [7-9] ,
抑制白血病或其他癌细胞中核酸及蛋白质的药物, 可用于固体推进剂和混合炸药,提升武器系统的能
近年来还发现一些呋咱环化合物对艾滋病毒有较好 量水平。
[6]
的抑制作用 。在民用领域,呋咱类化合物常用作 3-氨基呋咱-4-羧酸是合成呋咱、氧化呋咱、吡
金属抛光剂、防腐剂、照相感光促进剂等。在国防 咯呋咱等化合物的重要中间体。以 3-氨基呋咱-4-羧
收稿日期:2018-11-15; 定用日期:2019-03-19; DOI: 10.13550/j.jxhg.20180847
基金项目:国家自然科学基金(218751585)
作者简介:陆婷婷(1986—),女,副研究员。联系人:汪营磊(1983—),男,副研究员,E-mail:79921781@qq.com。