广东化工
廣東化工
엄동화공
GUANGDONG CHEMICAL INDUSTRY
2011年
10期
45-45,53
,共2页
杨荣强%邵建华%张胜建%赵迎宪
楊榮彊%邵建華%張勝建%趙迎憲
양영강%소건화%장성건%조영헌
呋喃%乙酰化%离子液体%磷酸%协同催化作用
呋喃%乙酰化%離子液體%燐痠%協同催化作用
부남%을선화%리자액체%린산%협동최화작용
Furan%acylation%ionic liquids%H3PO4%synergism
以磷酸为催化剂,研究不同离子液体对呋喃、噻吩与乙酸酐的乙酰化反应影响。还考察了原料比例、反应温度和时间对反应的影响。结果表明:[Bmim]PF6、[Bmim]BF4与磷酸存在协同催化作用。离子液体中的阳离子[Bmim]+可能对呋喃等杂环起稳定作用且减少缩合,阴离子可促进反应。50℃,反应8 h,n(呋喃):n(乙酸酐)=1:1.5,m(呋喃):m(磷酸):m([Bmim]PF6)=13.6:1:1,转化率94.8%,收率88.5%。噻吩乙酰化时,m(呋喃):m(磷酸):m([Bmim]PF6)=16.8:1:1,其他条件同呋喃一样,收率95.4%。
以燐痠為催化劑,研究不同離子液體對呋喃、噻吩與乙痠酐的乙酰化反應影響。還攷察瞭原料比例、反應溫度和時間對反應的影響。結果錶明:[Bmim]PF6、[Bmim]BF4與燐痠存在協同催化作用。離子液體中的暘離子[Bmim]+可能對呋喃等雜環起穩定作用且減少縮閤,陰離子可促進反應。50℃,反應8 h,n(呋喃):n(乙痠酐)=1:1.5,m(呋喃):m(燐痠):m([Bmim]PF6)=13.6:1:1,轉化率94.8%,收率88.5%。噻吩乙酰化時,m(呋喃):m(燐痠):m([Bmim]PF6)=16.8:1:1,其他條件同呋喃一樣,收率95.4%。
이린산위최화제,연구불동리자액체대부남、새분여을산항적을선화반응영향。환고찰료원료비례、반응온도화시간대반응적영향。결과표명:[Bmim]PF6、[Bmim]BF4여린산존재협동최화작용。리자액체중적양리자[Bmim]+가능대부남등잡배기은정작용차감소축합,음리자가촉진반응。50℃,반응8 h,n(부남):n(을산항)=1:1.5,m(부남):m(린산):m([Bmim]PF6)=13.6:1:1,전화솔94.8%,수솔88.5%。새분을선화시,m(부남):m(린산):m([Bmim]PF6)=16.8:1:1,기타조건동부남일양,수솔95.4%。
The influence of ionic liquids on Friedel-Crafts acylation of furan and thiophene with acetic anhydride catalyzed by H3PO4 was studied.The effects of material ratio,reaction temperature and reaction time were investigated.The results shown: PF6,BF4 and H3PO4 showed synergistic effect in the process.The cation + may played a role in stabilizing condensation of heterocyclic compounds as furan,and the anion of ILs synergized with H3PO4 catalyzed the acylation of furan and thiophene.Under the optimum conditions of 50 ℃,and 8 h,n(furan):n(acetic anhydride)=1:1.5,m(furan):m(H3PO4):m(PF6)=13.6:1:1,the conversion rate and yield are 94.8 % and 88.5 %.When using thiophene as raw material,the other reaction conditions the same as furan,m(thiophene):m(H3PO4):m(PF6)=16.8:1:1,the yield was 95.4 %.