淮阴师范学院学报:自然科学版
淮陰師範學院學報:自然科學版
회음사범학원학보:자연과학판
Journal of Huaiyin Teachers College(Natrual Science Edition)
2011年
4期
316-318
,共3页
相转移催化%对溴苯甲酸%合成
相轉移催化%對溴苯甲痠%閤成
상전이최화%대추분갑산%합성
phase transfer catalyst%4-bromobenzoic acid%synthesis
研究了以水为溶剂,三乙基苄基氯化胺(TEBA)为催化剂,对溴甲苯为原料,高锰酸钾为氧化剂,在酸性和碱性条件下合成对溴苯甲酸的反应.考察了催化剂用量、反应物摩尔比、反应温度、反应时间等对反应的影响.最优条件为:以水为溶剂,n(对溴甲苯)∶n(KMnO4)∶n(Na2CO3)为1.0∶2.5∶1.0,TEBA(5%)为催化剂,反应温度95℃,反应时间2.5 h,对溴苯甲酸的产率可达82.44%.
研究瞭以水為溶劑,三乙基芐基氯化胺(TEBA)為催化劑,對溴甲苯為原料,高錳痠鉀為氧化劑,在痠性和堿性條件下閤成對溴苯甲痠的反應.攷察瞭催化劑用量、反應物摩爾比、反應溫度、反應時間等對反應的影響.最優條件為:以水為溶劑,n(對溴甲苯)∶n(KMnO4)∶n(Na2CO3)為1.0∶2.5∶1.0,TEBA(5%)為催化劑,反應溫度95℃,反應時間2.5 h,對溴苯甲痠的產率可達82.44%.
연구료이수위용제,삼을기변기록화알(TEBA)위최화제,대추갑분위원료,고맹산갑위양화제,재산성화감성조건하합성대추분갑산적반응.고찰료최화제용량、반응물마이비、반응온도、반응시간등대반응적영향.최우조건위:이수위용제,n(대추갑분)∶n(KMnO4)∶n(Na2CO3)위1.0∶2.5∶1.0,TEBA(5%)위최화제,반응온도95℃,반응시간2.5 h,대추분갑산적산솔가체82.44%.
Research on synthesis of 4-bromobenzoic acid was investigated with 4-bromotoluene as raw material,potassium permanganate as the oxidant,TEBA as catalyst,in acid or alkali conditions.A series of experiments were inspected to study the influence on the reaction.Optimization: with water as solvent,TEBA(5%) as catalyst,n(4-bromotoluene)∶n(KMnO4)∶n(Na2CO3)=1.0∶2.5∶1.0,at 95℃ for 2.5 h,4-bromobenzoic acid was obtained in the yield of 82.4%.