CN102603727A - 一种苯并噻唑衍生物的合成方法 - Google Patents

一种苯并噻唑衍生物的合成方法 Download PDF

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CN102603727A
CN102603727A CN2012100498484A CN201210049848A CN102603727A CN 102603727 A CN102603727 A CN 102603727A CN 2012100498484 A CN2012100498484 A CN 2012100498484A CN 201210049848 A CN201210049848 A CN 201210049848A CN 102603727 A CN102603727 A CN 102603727A
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邹强
阳泰
广兵
刘阳
李丽梅
李敏惠
李华
罗兴燕
刘进
杨淑霞
郑静
王衍堂
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Abstract

本发明提供了一种苯并噻唑衍生物的合成方法。本发明式1化合物(2-(1氢-苯并噻唑基-2基)-4,5,6,7-四氢-2氢-吲唑-3-醇)的合成方法中,反应原料易得,反应操作简便,产品收率可达到40%以上,纯度均在95%以上,且可高达98%,收率和纯度均较高,且重复性好,为式1化合物提供了一种实用性良好的合成方法,为进一步研究式1化合物提供了可靠的来源。

Description

一种苯并噻唑衍生物的合成方法
技术领域
本发明涉及一种苯并噻唑衍生物的合成方法。
背景技术
苯并噻唑衍生物,可抑制蛋白质激酶(protein kinases)活性,由于蛋白质激酶在细胞过程的调节和维持起到了重要作用,在许多疾病状态中都观察到了激酶活性异常,所以苯并噻唑衍生物具有治疗与激酶活性异常相关疾病的潜力。如:恶性肿瘤,免疫性疾病、心血管疾病、糖尿病、感染性疾病、关节炎和其它免疫紊乱、神经系统如老年性痴呆症,阿默海茨症AD等,可见苯并噻唑衍生物具有重要的生物学活性。为了能够对苯并噻唑类衍生物进行更为深入的研究,需要不断探索该类衍生物的新结构。
2-(1氢-苯并噻唑基-2基)-4,5,6,7-四氢-2氢-吲唑-3-醇,其结构式如下:
式1
该化合物即为苯并噻唑衍生物,目前,还未见该化合物的合成方法。
发明内容
本发明的目的在于提供一种苯并噻唑衍生物的合成方法,具体为2-(1氢-苯并噻唑基-2基)-4,5,6,7-四氢-2氢-吲唑-3-醇的合成方法。
式1所示化合物的合成方法,化合物结构如下:
Figure BDA0000139652790000012
式1
其合成方法包括如下步骤:
取式2化合物、2-肼基苯并噻唑,进行缩合反应后,即得式1化合物;其中,式2化合物的结构式如下:
Figure BDA0000139652790000013
式2
其中,Cn为C1-C5的烷基。本发明中式2化合物,可以通过2-环己酮甲酸和C1-C5的简单醇类化合物缩合而成。
其中,所述式2化合物为2-环己酮甲酸乙酯、2-环己酮甲酸甲酯或2-环己酮甲酸丙酯中的一种或两种以上的混合物;式2化合物与2-肼基苯并噻唑的摩尔用量比为(0.5-1.5)∶1;反应中选用有机酸或无机酸为催化剂,催化剂与式2化合物的摩尔用量比为(0.01-0.1)∶1;溶剂选用甲苯、乙醇、甲醇;反应温度为20-200℃。
进一步地,所述式2化合物2-环己酮甲酸乙酯,式2化合物与2-肼基苯并噻唑的摩尔用量比为(0.7-1)∶1。
进一步地,催化剂选自醋酸、对甲基苯磺酸、甲酸、或非氧化性无机酸酸。
进一步优选地,催化剂选自醋酸,醋酸与式2化合物的摩尔用量比为(0.012-0.014)∶1;或
催化剂选自对甲基苯磺酸,对甲基苯磺酸与式2化合物的摩尔用量比为(0.056-0.057)∶1。
进一步地,所述溶剂为甲苯。
进一步地,反应温度为120-125℃。
其中,缩合反应后,用乙醇重结晶。
发明人在实验研究中发现,该化合物可抑制蛋白激酶活性,对淋巴细胞瘤细胞抑制作用明显,并且,能够抑制人活化T细胞,而对静息T细胞没有毒性。可以看出,该化合物的药效活性较强,具有良好的药用前景。
本发明式1化合物(2-(1氢-苯并噻唑基-2基)-4,5,6,7-四氢-2氢-吲唑-3-醇)的合成方法中,反应原料易得,反应操作简便,产品收率可达到40%以上,纯度均在95%以上,且可高达98%,收率和纯度均较高,且重复性好,为式1化合物提供了一种实用性良好的合成方法,为进一步研究式1化合物提供了可靠的来源。
显然,根据本发明的上述内容,按照本领域的普通技术知识和惯用手段,在不脱离本发明上述基本技术思想前提下,还可以做出其它多种形式的修改、替换或变更。
以下通过具体实施方式对本发明作进一步的详细描述,但并不限制本发明,本领域技术人员可以根据本发明作出各种改变和变形,只要不脱离本发明的精神,均应属于本发明所附权利要求的范围。
附图说明
图1式1化合物的核磁共振鉴定图
图2图1中A部分放大图
图3图1中B部分放大图
图4式1化合物的质谱图
图5式1化合物的HPLC图
具体实施方式
实施例1 式1化合物的合成方法
混合原料2-环己酮甲酸甲酯(0.264mol),2-肼基苯并噻唑(0.333mol),甲苯700mL,取醋酸1ml(醋酸与原料2-环己酮甲酸甲酯摩尔比约为0.07∶1),于1000mL反应瓶,加热120-125℃回流反应5h(TLC监测反应终点)。反应液减压蒸干,残留物加800mL乙醇重结晶,过滤,干燥,得橙黄色固体粉末36g,收率50%,经HPLC测定,式1化合物纯度达到98.22%,参见图5和表1。
表1 HPLC数据
  保留时间   面积   %面积   高度
  1   24.372   100405   0.51   16829
  2   24.594   248193   1.27   38580
  3   26.802   19186893   98.22   2940591
所得化合物的结构鉴定结果如下:
1H NMR(DMSO-d6,600MHz):δ8.01(d,1H,J=7.86Hz),7.78(d,1H,J=7.80Hz),7.46(t,1H,J=7.6Hz),7.33(t,1H,J=7.5Hz),2.50(m,2H),2.20(m,2H),1.73(m,2H),1.67(m,2H)。核磁参见图1-3。
ESI-MS:m/z 270(M-1)-质谱图参见图4。
实施例2 式1化合物的合成方法
混合原料2-环己酮甲酸甲酯(0.264mol),2-肼基苯并噻唑(0.333mol),甲苯700mL,醋酸1mL于1000mL反应瓶,TLC监测反应,室温反应3天达到终点。反应液减压蒸干,残留物加800mL乙醇重结晶,过滤,干燥,得橙黄色固体粉末33.4g,收率45%,纯度高于95%。经鉴定,所得化合物为式1化合物。
实施例3 式1化合物的合成方法
混合原料2-环己酮甲酸甲酯(0.264mol),2-肼基苯并噻唑(0.333mol),甲苯700mL,取甲酸0.5ml(甲酸与原料环己酮酯摩尔比约为0.05∶1),于1000mL反应瓶,外加热120-125℃回流反应5h(TLC监测反应终点)。反应液减压蒸干,残留物加800mL乙醇重结晶,过滤,干燥,得橙黄色固体粉末36g,收率50%,纯度高于95%。经鉴定,所得化合物为式1化合物。
实施例4 式1化合物的合成方法
混合原料2-环己酮甲酸乙酯(0.264mol),2-肼基苯并噻唑(0.333mol),乙醇700mL,醋酸1mL于1000mL反应瓶,回流反应36h(TLC监测反应终点)。反应液减压蒸干,残留物加800mL乙醇重结晶,过滤,干燥,得橙黄色固体粉末30g,收率42%,纯度高于95%。经鉴定,所得化合物为式1化合物。
实施例5 式1化合物的合成方法
混合原料2-环己酮甲酸乙酯(0.264mol),2-肼基苯并噻唑(0.333mol),甲苯700mL,醋酸1mL于1000mL反应瓶,回流反应42h(TLC监测反应终点)。反应液减压蒸干,残留物加800mL乙醇重结晶,过滤,干燥,得橙黄色固体粉末35g,收率49%。经鉴定,所得化合物为式1化合物。
实施例6 式1化合物的合成方法
在50ml反应瓶中加入2-环己酮甲酸甲酯(0.0132mol),2-肼基苯并噻唑(0.0133mol),甲苯20ml,醋酸0.01ml(醋酸与环己酮酯的摩尔比约为0.013∶1),外加热120-125℃回流反应5h;反应液减压蒸干;残留物加20mL乙醇重结晶,过滤,干燥,得橙黄色固体即为2-(1氢-苯并噻唑基-2基)-4,5,6,7-四氢-2氢-吲唑-3-醇。收率为58%,纯度高于95%。经鉴定,所得化合物为式1化合物。
实施例7 式1化合物的合成方法
在250ml反应瓶中加入2-环己酮甲酸甲酯(0.0132mol),2-肼基苯并噻唑(0.0133mol),甲苯100ml,对甲基苯磺酸0.45g(对甲基苯磺酸与环己酮酯的摩尔比约为0.0568∶1),外加热120-125℃回流反应5h;反应液减压蒸干;乙酸乙酯萃取,水洗,干燥,浓缩,残留物加200mL乙醇重结晶,过滤,干燥,得橙黄色固体即为2-(1氢-苯并噻唑基-2基)-4,5,6,7-四氢-2氢-吲唑-3-醇。收率为59%,纯度高于95%。经鉴定,所得化合物为式1化合物。
综上所述,本发明式1化合物(2-(1氢-苯并噻唑基-2基)-4,5,6,7-四氢-2氢-吲唑-3-醇)的合成方法中,反应原料易得,反应操作简便,产品收率可达到40%以上,纯度均在95%以上,且可高达98%,收率和纯度均较高,且重复性好,为式1化合物提供了一种实用性良好的合成方法,为进一步研究式1化合物提供了可靠的来源。

Claims (8)

1.式1所示化合物的合成方法,其合成方法包括如下步骤:
Figure FDA0000139652780000011
式1
取式2化合物、2-肼基苯并噻唑,进行缩合反应后,即得式1化合物;其中,式2化合物的结构式如下:
Figure FDA0000139652780000012
式2
其中,Cn为C1-C5的烷基。
2.根据权利要求1所述的合成方法,其特征在于:所述式2化合物为2-环己酮甲酸乙酯、2-环己酮甲酸甲酯或2-环己酮甲酸丙酯中的一种或两种以上的混合物;式2化合物与2-肼基苯并噻唑的摩尔用量比为(0.5-1.5)∶1;反应中选用有机酸或无机酸为催化剂,催化剂与式2化合物的摩尔用量比为(0.01-0.1)∶1;溶剂选用甲苯、乙醇、甲醇;反应温度为20-200℃。
3.根据权利要求2所述的合成方法,其特征在于:所述式2化合物2-环己酮甲酸乙酯,式2化合物与2-肼基苯并噻唑的摩尔用量比为(0.7-1)∶1。
4.根据权利要求2所述的合成方法,其特征在于:催化剂选自醋酸、对甲基苯磺酸、甲酸、或非氧化性无机酸酸。
5.根据权利要求4所述的合成方法,其特征在于:催化剂选自醋酸,醋酸与式2化合物的摩尔用量比为(0.012-0.014)∶1;或
催化剂选自对甲基苯磺酸,对甲基苯磺酸与式2化合物的摩尔用量比为(0.056-0.057)∶1。
6.根据权利要求2所述的合成方法,其特征在于:所述溶剂为甲苯。
7.根据权利要求2所述的合成方法,其特征在于:反应温度为120-125℃。
8.根据权利要求1所述的合成方法,其特征在于:缩合反应后,用乙醇重结晶。
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