CN108191625B - (e)-1-(4-羟基-3-甲氧基苯基)-4-烯-3-十酮的制备方法 - Google Patents

(e)-1-(4-羟基-3-甲氧基苯基)-4-烯-3-十酮的制备方法 Download PDF

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CN108191625B
CN108191625B CN201810084059.1A CN201810084059A CN108191625B CN 108191625 B CN108191625 B CN 108191625B CN 201810084059 A CN201810084059 A CN 201810084059A CN 108191625 B CN108191625 B CN 108191625B
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methoxyphenyl
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butanone
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叶兆宝
黄培培
谢垠榕
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Xiamen Yunfan Biotechnology Co.,Ltd.
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    • C07C45/00Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
    • C07C45/61Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups
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    • C07C45/72Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton by increase in the number of carbon atoms by reaction of compounds containing >C = O groups with the same or other compounds containing >C = O groups
    • C07C45/74Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton by increase in the number of carbon atoms by reaction of compounds containing >C = O groups with the same or other compounds containing >C = O groups combined with dehydration

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Abstract

(E)‑1‑(4‑羟基‑3‑甲氧基苯基)‑4‑烯‑3‑十酮的制备方法,涉及药物化学领域,包括以下步骤:1)将4‑(4‑羟基3‑甲氧基苯基)‑2‑丁酮溶解于卤代烃溶剂中,室温下加入四氢吡咯或哌啶,反应15分钟至120分钟后;2)加入正己醛的卤代烃溶液,反应2至24小时后;3)加入无机碱溶液,反应1至24小时后,后处理即制得式(I)所示化合物;本发明采用无机碱等弱碱,在室温反应,总产率78%以上。本发明的方法条件反应条件温和,操作简便,适合于工业化生产。

Description

(E)-1-(4-羟基-3-甲氧基苯基)-4-烯-3-十酮的制备方法
技术领域
本发明涉及药物化学领域,具体涉及(E)-1-(4-羟基-3-甲氧基苯基)-4-烯-3-十酮的制备方法。
背景技术
Shogaol,(E)-1-(4-羟基-3-甲氧基苯基)-4-烯-3-十酮,结构式(Ⅰ),该化合物除了具有解热、镇痛的作用外,在止咳方面也有很好的效果。
Figure BDA0001561870120000011
目前报道过的合成该物质的方法主要有以下几种:
Food Chemistry,2014,165,191-197报道以(E)-4-(4-羟基-3-甲氧基苯基)-3-烯-2-丁酮为原料,先后用正丁基锂和LDA处理后,再跟正己醛发生缩合反应,得到中间体(Ⅲ)。然后用Pd/C氢化还原得到中间体(Ⅳ),最后在酸性条件下消除得到目标产物(Ⅰ)。合成路线如下:
Figure BDA0001561870120000012
专利EP1506958A1公开了另一种方法,以2-甲氧基-4-(2-甲酰基乙基)苯基苯甲酸酯为原料,在正丁基锂的作用下和结构式(Ⅵ)反应,得到中间体(Ⅶ)。然后在催化剂(PPh3)4Pd的作用下,发生氧化和脱Ts保护,得到中间体(Ⅷ)。经过皂化反应脱掉苯甲酰基,然后酸化得到目标产物shogaol,总收率41%。合成路线如下:
Figure BDA0001561870120000021
结构式(VI),(E)-1-对甲苯磺酰基-2-庚烯:
Figure BDA0001561870120000022
J.Org.Chem.1994,59,111-119报道了采用经过Witting反应的方法合成shogaol。原料Ⅸ先和Ⅹ反应得到Witting反应的前体,然后在碱Cs2CO3的作用下和正己醛反应,最后用硅胶脱去TBDMS保护基,得到中间体Ⅺ。经过三氟乙酸处理后,在苯中加热脱羧即得到目标产物,总收率49%。合成路线如下:
Figure BDA0001561870120000023
结构式(Ⅹ):
Figure BDA0001561870120000024
在已公开的方法中,多使用正丁基锂或LDA,试剂遇水易着火,需要在严格的无水无氧条件下操作,且需要在-78℃下反应,无法放大量生产,且生产成本很高。
发明内容
为了解决现有技术存在的问题,本发明提供一种无需使用强碱且在室温下制备(E)-1-(4-羟基-3-甲氧基苯基)-4-烯-3-十酮的方法。
本发明的技术方案如下:
一种(E)-1-(4-羟基-3-甲氧基苯基)-4-烯-3-十酮,结构式(Ⅰ)的制备方法,
Figure BDA0001561870120000031
包括以下步骤:
1)将4-(4-羟基3-甲氧基苯基)-2-丁酮溶解于卤代烃溶剂中,室温下加入四氢吡咯(THP)或哌啶;反应15分钟至120分钟后,
2)加入正己醛的卤代烃溶液,反应2至24小时后,
3)加入无机碱溶液,反应1至24小时后,后处理即制得式(I)所示化合物。
在一些实施例中,步骤1)所述四氢吡咯或哌啶约为2-5当量;在一些实施例中,所述卤代烃可选自二氯甲烷、1,2-二氯乙烷、四氯化碳等。
在一些实施例中,所述无机碱为氢氧化钠、氢氧化钾、碳酸钾或碳酸钠等,所述无机碱的用量为2-10当量,所述无机碱溶液的质量分数为10%至15%。
在一些实施例中,步骤1)所述4-(4-羟基3-甲氧基苯基)-2-丁酮的制备工艺如下:
A)将60g NaOH溶于350mL水中,冷却到10℃以下后,加入150mL丙酮,加入45.6g香兰素,室温反应过夜。冷却到0℃后,用浓HCl调pH=1-2,有大量的黄色固体析出,在0℃下搅拌3h,过滤,
B)将38.44g 4-(4-羟基-3-甲氧基苯基)-3-烯-2-丁酮溶于500mL乙醇中,搅拌下加入500mL醋酸,在加入1.92g Pd/C,套上氢气球后换气三次,在室温下反应1小时后,过滤。
本发明所述制备(E)-1-(4-羟基-3-甲氧基苯基)-4-烯-3-十酮的方法,采用与现有技术不同的反应机理制备,采用无机碱等弱碱,在室温反应,总产率78%以上。本发明的方法条件反应条件温和,操作简便,适合于工业化生产。
具体实施方式
为了使本领域的技术人员更好地理解本发明的技术方案,下面进一步披露一些非限制实施例对本发明作进一步的详细说明。
实施例1
Figure BDA0001561870120000041
操作步骤:
将60g NaOH溶于350mL水中,冷却到10℃以下后,加入150mL丙酮,加45.6g香兰素,室温反应过夜。冷却到0℃后,用浓HCl调pH=1-2,有大量的黄色固体析出,在0℃下搅拌3h,过滤,用水洗涤滤饼3次,然后真空干燥8h得54.78g产品,收率95%。
1H NMR(400MHz,CDCl3)δ=7.44(d,J=16.2Hz,1H),7.09-7.04(m,2H),6.92(d,J=8.2Hz,1H),6.58(d,J=16.2Hz,1H),6.09(s,1H),3.92(s,3H),2.36(s,3H).
Figure BDA0001561870120000042
操作步骤:
将38.44g 4-(4-羟基-3-甲氧基苯基)-3-烯-2-丁酮溶于500mL乙醇中,搅拌下加入500mL醋酸,再加1.92g Pd/C,套上氢气球后换气三次,在室温下反应1小时后,过滤,滤液蒸去乙醇后加水,然后用乙酸乙酯萃取,分液,有机相分别用饱和NaHCO3溶液和水洗涤,减压除去溶剂,柱层析分离,得到无色液体31.07g,收率87%。
1H NMR(400MHz,CDCl3)δ=6.82(d,J=8.0Hz,1H),6.69-6.64(m,2H),5.60(s,1H),3.86(s,3H),2.84-2.80(m,2H),2.74-2.70(m,2H),2.13(s,3H).
Figure BDA0001561870120000051
操作步骤:
将38.85g 4-(4-羟基3-甲氧基苯基)-2-丁酮溶于500mL二氯甲烷中,室温搅拌下加入26mL四氢吡咯(THP),反应15min后,缓慢加入正己醛(15.65g,溶于100mL二氯甲烷),继续反应18h,加100mL水,加16.00g NaOH(溶于100mL水),室温搅拌3h后,分液。有机相加入3NHCl至pH=2-3,分液,有机相水洗涤一次,无水Na2SO4干燥,减压除去溶剂,得到黄色油状物45.52g,HPLC检测纯度为95.34%。
1H NMR(400MHz,CDCl3)δ=6.85-6.78(m,2H),6.70-6.67(m,2H),6.11-6.07(m,1H),5.54(s,1H),3.86(s,3H),2.89-2.80(m,4H),2.19(q,J=7.0,2H),1.48-1.41(m,2H),1.34-1.26(m,4H),0.89(t,J=7.0Hz,3H).
以上所述仅为本发明的优选实施例而已,并不用于限制本发明,对于本领域的技术人员来说,本发明可以有各种更改和变化。凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。

Claims (6)

1.一种(E)-1-(4-羟基-3-甲氧基苯基)-4-烯-3-十酮,结构式(Ⅰ)的制备方法,
Figure DEST_PATH_IMAGE001
包括以下步骤:
1)将4-(4-羟基3-甲氧基苯基)-2-丁酮溶解于卤代烃溶剂中,室温下加入四氢吡咯;反应15分钟至120分钟后,
2)加入正己醛的卤代烃溶液,反应2至24小时后,
3)加入无机碱溶液,反应1至24小时后,后处理即制得式(I)所示化合物。
2.如权利要求1所述的制备方法,步骤1)所述四氢吡咯为2-5当量。
3.如权利要求1所述的制备方法,所述卤代烃为二氯甲烷、1,2-二氯乙烷、四氯化碳。
4.如权利要求1所述的制备方法,所述无机碱为氢氧化钠、氢氧化钾、碳酸钾或碳酸钠,所述无机碱的用量为2-10当量。
5.如权利要求4所述的制备方法,所述无机碱溶液的质量分数为10%至15%。
6.如权利要求1所述的制备方法,步骤1)所述4-(4-羟基3-甲氧基苯基)-2-丁酮的制备工艺如下:
A)将60g NaOH溶于350mL水中,冷却到10℃以下后,加入150mL丙酮,加入45.6g香兰素,室温反应过夜,冷却到0℃后,用浓HCl调pH=1-2,有大量的黄色固体析出,在0℃下搅拌3h,过滤,
B)将38.44g 4-(4-羟基-3-甲氧基苯基)-3-烯-2-丁酮溶于500mL乙醇中,搅拌下加入500mL醋酸,再加入1.92g Pd/C,套上氢气球后换气三次,在室温下反应1小时后,过滤。
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JPS61134338A (ja) * 1984-12-03 1986-06-21 Wako Pure Chem Ind Ltd フエノ−ルケトン化合物の製造法

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JPS61134338A (ja) * 1984-12-03 1986-06-21 Wako Pure Chem Ind Ltd フエノ−ルケトン化合物の製造法

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环戊酮与醛的缩合反应性能研究;赵婧如;《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》;中国学术期刊(光盘版)电子杂志社;20140715(第07期);第3.2.2、4.2.2、4.3.2、4.3.4节 *

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