第 39 卷第 5 期 |  | Vol. 39 No. 5 | 2009 年 10 月 | Oct 2009 |
|
所屬欄目:醫藥及中間體
相轉移催化法合成5-羥基黃酮的研究 |
石 強,王作全,姚轉樂(lè ),張麗潔,姬明理,樊學(xué)忠
(西安近代化學(xué)研究所,陜西 西安 710065) |
摘 要:以間苯二酚為原料,經(jīng)過(guò)成環(huán)、酯化、重排、開(kāi)環(huán)4步反應,制得2,6-二羥基苯乙酮(1),對1進(jìn)行了1H NMR表征,并對1 的合成機理進(jìn)行了推測;1 與苯甲酰氯在相轉移催化劑四丁基硫酸氫銨催化下進(jìn)行反應,得到5-羥基黃酮(2),對2 進(jìn)行了IR及1H NMR表征,并對其合成機理進(jìn)行了推測?疾炝讼噢D移催化反應溫度、催化劑加入量對于產(chǎn)品收率的影響,較佳條件為:反應溫度60℃,n(1) ∶ n(四丁基硫酸氫銨)=1 ∶ 1.3,2 的收率達到65%。 |
關(guān)鍵詞:5-羥基黃酮;相轉移催化;2,6-二羥基苯乙酮;合成 |
中圖分類(lèi)號:R914.5 O621.3 文獻標識碼:A 文章編號:1009-9212(2009)05- 0047-03 |
|
Synthesis of 5-Hydroxyflavone by Phase-transfer Catalysis |
SHI Qiang,WANG Zuo-quan,YAO Zhuan-le,ZHANG Li-jie,JI Ming-li,FAN Xue-zhong
(Xi’an Modern Chemistry Research Institute,Xi’an 710065,China) |
Abstract:Reaction of 2,6-dihydroxyacetophenone(1)with benzoyl chloride under phase-transfer catalysis by tetrabutyl ammonium bisulfate formed 5-hydroxyflavone(2) in 65% yield at 60℃ with n(1) : n(tetrabutylammoniumbisulfate) = 1 ∶ 1.3. 1 was synthesized from resorcinol in four steps including cyclization,esterification,rearrangement and ring-opening. The structures of 1 and 2 were identified by IR and 1H NMR. Mechanisms for formation of 1 and 2 were also proposed. |
Key words:5-hydroxyflavone;phase-transfer catalysis;2,6-dihydroxyacetophenone;synthesis |
|
作者簡(jiǎn)介:石 強(1967-),男,廣東番禺人,高級工程師,碩士,主要從事醫藥及醫藥中間體的合成研究。(E-mail:shiqiangxa@sohu.com)
|
收稿日期:2009-08-31
|
|