李心琮; 吾满江·艾力
Source Publication精细化工

该文以1-甲基咪唑、吡啶、苄基氯、硫酸、磷酸为原料,合成了4种B r nsted酸性离子液体:1-甲基-3-苄基咪唑硫酸氢根盐(a),1-甲基-3-苄基咪唑磷酸二氢根盐(b),N-苄基吡啶硫酸氢根盐(c),N-苄基吡啶磷酸二氢根盐(d),以它们作为催化剂和反应介质,考察了苯甲酸与系列脂肪醇、苄醇与系列脂肪酸、苯甲酸在无溶剂和微波辐射反应条件下的F ischer酯化反应,结果表明,当苯甲酸或苄醇与离子液体的摩尔比为1∶0.5时,无需外加催化剂,反应即可在化学计量条件下进行,12~20 m in完成反应,苯甲酸酯与苄酯的收率分别为77%~98%和78%~98.5%,气相色谱纯度≥95%。离子液体循环使用3次,催化活性仅下降1.8%~3.4%。

Other Abstract

Four easily accessible Brphinsted acidic ionic liquids, 1-methyl-3-benzylimidazolium hydrogen sulfate,1-methy-3-benzylimidazolium hydrogen phosphate,N-benzylpyridinium hydrogen sulfate,and N- benzylpyridinium hydrogen phosphate, were synthesized from the commercially available starting material N-methylimidazole, pyridine, benzyl chloride, sulphuric acid and phosphoric acid. They act as reaction media and catalyst for the synthesis of benzoic esters and benzyl esters under solvent-free and microwave irradiation conditions. When the mole ratio of benzoic acid or benzyl alcohol to ionic liquid was 1:0.5 ,the reactions proceeded smoothly with equal mole of substrates in 12-20 min and gave the products in good or excellent yields (77%-98% and 78%-98.5% respectively). The recycled ionic liquids can be used three times without significant loss of catalytic activity

KeywordBrphinsted酸 离子液体 微波 苯甲酸酯 苄酯 精细化工中间体
Indexed ByCSCD
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Cited Times:5[CSCD]   [CSCD Record]
Document Type期刊论文
Affiliation中国科学院新疆理化技术研究所; 中国科学院研究生院
Recommended Citation
GB/T 7714
李心琮,吾满江·艾力. Brnsted酸性离子液体中苯甲酸酯、苄酯的无溶剂微波合成[J]. 精细化工,2008,25(3):308-312.
APA 李心琮,&吾满江·艾力.(2008).Brnsted酸性离子液体中苯甲酸酯、苄酯的无溶剂微波合成.精细化工,25(3),308-312.
MLA 李心琮,et al."Brnsted酸性离子液体中苯甲酸酯、苄酯的无溶剂微波合成".精细化工 25.3(2008):308-312.
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