CN102924355A - 2-取代苯甲醛缩肼基硫代甲酸苄酯席夫碱锌、镍配合物及其用途 - Google Patents
2-取代苯甲醛缩肼基硫代甲酸苄酯席夫碱锌、镍配合物及其用途 Download PDFInfo
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- 239000011701 zinc Substances 0.000 title claims abstract description 17
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- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 12
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 11
- XDAPOZNYUAPWCC-UHFFFAOYSA-N benzyl n-aminocarbamodithioate Chemical compound NNC(=S)SCC1=CC=CC=C1 XDAPOZNYUAPWCC-UHFFFAOYSA-N 0.000 title claims abstract description 6
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Abstract
本发明公开了一种2-取代苯甲醛缩肼基二硫代甲酸苄酯席夫碱金属配合物及其用途,属生物生物无机化学领域。它有如下结构:M=Zn、Ni,X=Cl、NO2。该类金属配合物对癌细胞有明显的抑制作用,可以作为制备癌细胞抑制剂药物。
Description
技术领域
本发明涉及2-取代苯甲醛缩肼基硫代甲酸苄酯席夫碱锌、镍配合物及其制备方法与用途,属生物无机化学领域。
背景技术
顺铂是常用的治疗癌症的化学药物之一,但它的应用受到毒副作用(如肾脏毒性、骨髓毒性、耳毒性、神经毒性)、耐药性、不可口服等因素的限制。这些缺点促使人们去研发药理活性更好的金属抗癌药物。目前研发的金属抗癌药物主要分为二类,一类是铂类抗癌药物,另一类是非铂类抗癌药物。非铂类抗癌药物主要集中在具有生物活性、生命必需的微量金属元素上,如铜、锌。锌在细胞生理活动中发挥着重要的作用,是许多酶的活性中心,参与多种新陈代谢过程。相对于铂类配合物而言,锌配合物的毒性可能较小。
自从在十字花科植物中分离出萝卜硫素,人们发现氨基二硫代甲酸酯类化合物(如Sulforamate,oxomate,brassinin)具有很好的肿瘤预防和抗肿瘤活性, 氨基二硫代甲酸酯为药效基团。近年来,肼基二硫代甲酸苄酯席夫碱及其配合物引起了人们的兴趣。在该类席夫碱中引入一个简单的取代基,可能会导致配合物的结构和性质发生很大的变化。除此以外,此类配合物还表现出很好的生物活性,如抗菌活性、抗病毒活性和抗癌活性。因此,对此类化合物的结构和性质进行深入研究具有十分重要的理论价值和应用价值。
发明内容
本发明的目的在于提供一种新型2-取代苯甲醛缩肼基硫代甲酸苄酯席夫碱金属配合物;另一目的在于提供其在制备药物方面的用途。
本发明的技术方案如下:
该2-取代苯甲醛缩肼基硫代甲酸苄酯金属配合物有如下结构:
M = Zn、Ni,X =
Cl、NO2。
制备上述金属配合物的方法由下列步骤组成:
步骤1,将2-取代的苯甲醛和肼基二硫代甲酸苄酯溶解在无水乙醇溶剂中,加热回流反应,然后冷却至0 oC,用无水乙醇分别洗涤,减压过滤,得到固体化合物,将得到的固体化合物重结晶提纯,得到2-取代苯甲醛缩肼基二硫代甲酸苄酯(H2L)。
步骤2,将步骤1得到的2-取代苯甲醛缩肼基二硫代甲酸苄酯溶解在乙醇溶剂中,在搅拌下加入醋酸盐的无水乙醇溶液,搅拌反应,过滤,得清液。将清液静置数天后,析出晶体,即为2-取代苯甲醛缩肼基二硫代甲酸苄酯金属配合物。
肼基二硫代甲酸苄酯根据文献“Metal complexes of sulphur and nitrogen-containing
ligands: Complexes of s-benaldithiocarbazate and a schiff base formed by its
condensation with pyridine-2-carboxaldazate、M.
Akbar Ali., M.T.H. Tarafdar, J. Inorg. Nucl. Chem., 1977, 39:1785~1791”所述的方法制备,产率87%,m.p.123~124 oC。
所述2-取代的苯甲醛为2-氯代苯甲醛或2-硝基苯甲醛。
所述醋酸盐为醋酸锌或醋酸镍。
上述制备方法步骤2中所述2-取代苯甲醛缩肼基二硫代甲酸苄酯、醋酸盐的摩尔比为2:1。
经试验研究,本发明合成的苯甲醛缩肼基二硫代甲酸苄酯席夫碱金属配合物,对癌细胞具有明显的抑制作用,结果见表1,可以作为制备癌细胞抑制剂药物。其原料易得便宜,制备方法简单可行,便于工业化生产。
附图说明
图1为实施例1制得的锌配合物(1)晶体结构图;
图2为实施例2制得的镍配合物(2)晶体结构图;
图3为实施例3制得的锌配合物(3)晶体结构图。
具体实施方式
实施例一: 2-氯苯甲醛缩肼基二硫代甲酸苄酯席夫碱锌配合物的制备
1、在100mL圆底烧瓶中,将肼基二硫代甲酸苄酯(1.98
g, 10.0 mmol)溶解在30 ml的无水乙醇中,在激烈搅拌下,缓慢滴加等物质量的2-氯苯甲醛的乙醇溶液。然后加热回流4h后,冷却至0 oC,减压过滤,用乙醇洗涤,得到淡黄色的固体,将得到的固体溶于无水乙醇重结晶提纯,得到2-氯苯甲醛缩肼基二硫代甲酸苄酯(H2L)。产率57%。Anal. Calc. for C15H13ClN2S2:
C, 56.2; H, 4.1; N, 8.7,Found: C, 55.8;
H, 4.0; N, 8.9%.
2、将2-氯苯甲醛缩肼基二硫代甲酸苄酯(0.32
g, 1.0mmol)溶于20ml的无水乙醇溶剂中,在搅拌下加入Zn(OAc)2·2H2O(0.11 g, 0.5 mmol)的无水乙醇溶液,,搅拌反应4h后,过滤,得橙色清液,将清液静置7天后,析出橙色晶体,产率45%。Anal. Calc. for C30H24Cl2ZnN4S4:
C, 51.1; H, 3.4; N, 8.0. Found: C, 50.8; H, 3.0; N, 8.2%。经X-射线衍射分析其结果为:C30H24Cl2N4S4Zn。其晶体结构见图1,晶体学数据见表2,主要的键长和键角见表3。
实施例二:2-氯苯甲醛缩肼基二硫代甲酸苄酯席夫碱镍配合物的制备
制备方法同实施例一。醋酸镍代替醋酸锌,得到紫色晶体,产率56%。Anal. Calc. for C30H24Cl2N4S4Ni:
C, 51.6; H, 3.5; N, 8.0. Found: C, 51.4; H, 3.3; N, 8.3%.其晶体结构见图2,晶体学数据见表2,主要的键长和键角见表3。
实施例三:2-硝基苯甲醛缩肼基二硫代甲酸苄酯席夫碱镍配合物的制备
制备方法同实施例一。2-硝基苯甲醛代替2-氯苯甲醛,醋酸镍代替醋酸锌,得到紫色晶体,产率56%。Anal.
Calc. for C30H24N6O4S4Ni:
C, 50.1; H, 3.4; N, 11.7. Found: C, 49.4; H, 3.3; N, 11.8%. 其晶体结构见图3,晶体学数据见表2,主要的键长和键角见表3。
实施例四:本发明制得的2-取代苯甲醛缩肼基二硫代甲酸苄酯席夫碱金属配合物体外抑制癌细胞活性研究
采用MTT [3-(4, 5)-双甲基-2-噻唑-(2,5)-苯基溴化四氮唑蓝]法来测定配合物1-3对人胃癌细胞(MKN45)和肝癌细胞(HEPG2)的抑制率,计算IC50(μM)。
(1)培养液(每升)的配制:
RPMI-1640培养粉一袋(10.4 g),新生牛血清100
ml,青霉素溶液(20万U/ml)0.5 ml,链霉素溶液(20万U/ml)0.5 ml,加三蒸水溶解后,用5.6% 的NaHCO3溶液调pH值至7.2-7.4,最后定容至1000 ml。过滤灭菌。
(2)D-Hanks缓冲液(每升)的配制:NaCl 8.00 g, KCl 0.40 g, Na2HPO4·12 H2O 0.06 g, KH2PO4
0.06g, NaHCO3 0.35 g。高压灭菌。
(3)胰蛋白酶液的配制:利用D-Hanks缓冲液配成浓度为0.5% 胰蛋白酶液。过滤除菌。
(4)实验药液的配制:将本发明实施例制得的金属配合物测试样品用三蒸水和少量的DMSO溶解配成储备液,一般按实验最高浓度的10倍配制储备液。DMSO在培养液中的浓度不宜过大,加药后的每孔细胞悬液中DMSO的终浓度一般不超过0.05%-0.1%。储备液保存于-20oC冰箱中备用。
(5)人胃癌细胞MKN45的培养:常规培养于RPMI-1640培养液内(含10%小牛血清、100U/ml 链霉素),置于37oC、5% CO2培养箱中培养,每隔3-4天传代一次。传代时将原瓶中培养液转移至离心管中,1000 rpm离心5 min,弃去原培养液,加入等量新鲜培养液,吹打均匀,移取适量至新鲜培养瓶中,再补充新鲜培养液至原体积(培养液体积约为培养瓶容量的1/10)。
(6)人肝癌细胞HEPG2的培养:常规培养于RPMI-1640培养液内(含10%小牛血清、100U/ml 链霉素),置于37oC、5% CO2培养箱中培养,每隔3-4天传代一次。传代时将原瓶中培养液转移至离心管中,1000 rpm离心5 min,弃去原培养液,加入等量新鲜培养液,吹打均匀,移取适量至新鲜培养瓶中,再补充新鲜培养液至原体积(培养液体积约为培养瓶容量的1/10)。
(7)细胞孵育:取对数生长期的2种肿瘤细胞,调细胞悬液浓度为1-1.5×105个ml-1。在96孔培养板中每孔加细胞悬液100 μl,置37oC,5% CO2培养箱中培养24 h。培养24 h后,分别按设计加入药液。
(8)加药:将本发明实施例制得的金属配合物测试药液按照最终浓度的浓度梯度分别加入到各个孔中,每个浓度设6个平行孔。实验分为药物试验组(分别加入不同浓度的测试药)、对照组(只加培养液和细胞,不加测试药)和空白组(只加培养液,不加细胞和测试药)。将加药后的96孔板置于37oC,5% CO2培养箱中培养24、48、72 h。5-氟尿嘧啶(5-FU)为阳性对照药物,活性按照测试样品的方法测定。
(9)存活细胞的测定:在培养了24、48、72h后的96孔板中,每孔分别加MTT 40 μl(用D-Hanks缓冲液配成4 mg/ml)。在37oC放置4 h后,移去上清液。每孔加150 μl DMSO,振荡5 min,使formazan结晶溶解。最后,利用自动酶标仪在570
nm波长处检测各孔的光密度(OD值)。
抑制率的计算:细胞生长的抑制率按照下列公式计算:
生长抑制率=(1-存活率)×100% = [1-(OD实验-OD空白) /
(OD对照-OD空白)]×100%(OD实验表示本发明实施例制得的金属配合物测试药物组的平均光密度,OD对照表示对照组的平均光密度,OD空白表示对照组的平均光密度)。
半数抑制浓度(IC50)定义为当50%的肿瘤细胞存活时的药物浓度。根据测定的光密度(OD值),制作细胞生长抑制率的标准曲线,在标准曲线上求得其对应的药物浓度。
测得的IC50见表1所示:
表1 本发明所列配合物1-3的癌细胞的抑制IC50值(μM)
表2本发明配合物1-3的晶体学数据
| Compound | 1 | 2 | 3 |
| Empirical Formula | C30H24Cl2N4S4Zn | C30H24Cl2N4S4Ni | C30H24N6O4S4Ni |
| Formula weight | 705.04 | 698.38 | 719.50 |
| T/ K | 296(2) | 296(2) | 293(2) |
| Wavelength / Å | 0.71073 | 0.71073 | 0.71073 |
| Crystal shape/color | Block / orange | rod / purple | rod / purple |
| Crystal size / mm | 0.32 x 0.27 x 0.21 | 0.38 x 0.21 x 0.15 | 0.36 x 0.15 x 0.12 |
| Crystal system | Triclinic | Monoclinic | Triclinic |
| Space group | Pī | P21/c | Pī |
| a (Å) | 9.249(4) | 5.1377(9) | 7.584(2) |
| b (Å) | 12.975(5) | 25.116(4) | 9.972(3) |
| c (Å) | 3.844(6) | 12.092(2) | 11.730(3) |
| α (o) | 75.789(7) | 90 | 78.624(5) |
| β (o) | 88.522(7) | 99.235(3) | 74.409(4) |
| γ (o) | 78.467(7) | 90 | 70.867(5) |
| V / Å 3 | 1577.6(11) | 1540.1(5) | 801.4(4) |
| Z | 2 | 2 | 1 |
| D / g·cm -3 | 1.484 | 1.506 | 1.491 |
| μ(Mo Kα) / mm-1 | 1.240 | 1.103 | 0.912 |
| F(000) | 720 | 716 | 370 |
| θ range (o) | 1.95 to 26.00 | 1.89 to 26.00 | 1.82 to 26.00 |
| hmin / hmax | -10 / 11 | -6 / 6 | -9 / 9 |
| kmin / kmax | -15 / 11 | -26 / 30 | -12 / 10 |
| lmin / lmax | -17 / 15 | -13 / 14 | -14 / 14 |
| Data collected | 8774 | 8499 | 4389 |
| Unique data | 6099 | 3028 | 3108 |
| Maximum and minimum transmission | 0.7807 and 0.6923 | 0.8520 and 0.6793 | 0.8985 and 0.7350 |
| parameters | 370 | 187 | 205 |
| restraints | 0 | 0 | 0 |
| Goodness-of-fit on F2 | 1.057 | 1.043 | 0.997 |
| R1, wR2 | 0.0300, 0.0743 | 0.0329, 0.0752 | 0.0480, 0.0746 |
| R1, wR2 (all data) | 0.0388, 0.0776 | 0.0498, 0.0812 | 0.0945, 0.0803 |
| Largest difference peak and hole / (eÅ -3) | 0.311 and -0.303 | 0.309 and -0.215 | 0.441 and -0.458 |
表 3本发明配合物1-3的重要键长和键角
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