CN111689977A - 一种喜树碱20-位修饰的磺酰脲类化合物及其制备方法和用途 - Google Patents
一种喜树碱20-位修饰的磺酰脲类化合物及其制备方法和用途 Download PDFInfo
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- CN111689977A CN111689977A CN201910181803.4A CN201910181803A CN111689977A CN 111689977 A CN111689977 A CN 111689977A CN 201910181803 A CN201910181803 A CN 201910181803A CN 111689977 A CN111689977 A CN 111689977A
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- camptothecin
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- sulfonylurea compound
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- ethyl
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- VSJKWCGYPAHWDS-UHFFFAOYSA-N dl-camptothecin Natural products C1=CC=C2C=C(CN3C4=CC5=C(C3=O)COC(=O)C5(O)CC)C4=NC2=C1 VSJKWCGYPAHWDS-UHFFFAOYSA-N 0.000 title claims abstract description 24
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Abstract
本发明涉及式(I)所示的一种喜树碱20‑位修饰的磺酰脲类化合物,以及这种化合物的制备方法和其在制备抗肿瘤药物中的用途。该化合物化学通式如结构式(I)。式(I)中化合物的制备方法是不同的20‑氨基酸‑喜树碱三氟乙酸盐与不同取代的磺酰氨基甲酸乙酯反应而得到。经细胞毒活性测试证明,本发明所述的该类化合物具有较好的细胞毒活性,且大部分化合物的抗肿瘤活性高于临床对照药物伊立替康,部分化合物的抗肿瘤活性与临床对照药物拓扑替康相当,可用于制备抗肿瘤药物。本发明制备工艺简单、原料廉价易得,产品纯度高。
Description
技术领域
本发明涉及一种新的喜树碱20-位修饰的磺酰脲类化合物,以及这种化合物的制备方法和其在制备抗肿瘤药物中的用途。属于医药领域。
背景技术
喜树碱(Camptothecin,简称CPT)是由美国化学家Wall M.E和Wani M.C于1966年首先从我国珙桐科植物喜树中提取出来的一种具有显著细胞毒活性的喹啉类生物碱(J.Am.Chem.Soc.1966,88,3888-3890)。对骨癌、肝癌、膀胱癌和白血病等多种恶性肿瘤表现出较好的抑制作用,但将喜树碱用于临床时由于严重的副作用,如呕吐、骨髓抑制和腹泻等(Current Medicinal Chemistry-Anticancer Agents,2005,5(1):1-13.),同时未经修饰的天然喜树碱水溶性极差,因此早期临床用喜树碱的水溶性钠盐。但是开环形式的喜树碱极易与人血清蛋白(HAS)结合,大大降低了抗癌活性。更严重的是,开环形式的钠盐经肾脏代谢后对消化系统和泌尿系统有极大的毒副作用,导致II期临床中断。为进一步改善其水溶性和降低其毒副作用,近年来,国内外学者以喜树碱为先导进行了系统的修饰与衍生合成,获得了多个已被FDA批准上市或处于临床研究阶段的活性化合物如伊立替康、拓扑替康、9-氨基喜树碱、9-硝基喜树碱、DX-8951f、GG211、BNP-1350、ST-1481和CKD-602等(①Bioorg.Med.Chem.2004,12,1585-1604;②Phytochem.2004,65,2735-2749)。根据其喜树碱-抗肿瘤构效关系研究(SAR研究)表明,喜树碱内酯环在体内的稳定性是影响抗肿瘤活性的重要因素,α-羟基内酯环很容易水解开环生成水溶性钠盐,造成抗肿瘤活性降低。因此对20(S)-位进行改造与修饰,以提高人血液中内酯环的比例来期待提高这类化合物的活性并降低毒性,成为研究喜树碱的热点之一。文献报道表明,磺酰脲类化合物在结构上通常具有生物活性高、毒性小的特点,在医药和农药领域都有很广泛的应用。磺酰脲类化合物LY186641是一种已用于临床实验的抗肿瘤活性的药物,它对于肺癌、乳腺癌、结肠癌、卵巢癌、胰腺癌、肾癌和胃癌都具有很好的抗增殖作用(J.Med.Chem.1992,35,3012-3016)。不同于其他类型的抗肿瘤药物,磺酰脲类药物可通过抑制NADH氧化酶产生抗肿瘤活性(Biochimica et Biophysica Acta 1324,1997,171–181),因此,磺酰脲类结构被广泛应用于抗肿瘤药物的设计中。
据此,在喜树碱-抗肿瘤的构效关系的启发下,考虑将喜树碱20(S)-位进行修饰和改造,将有可能提高其活性并增强内酯环稳定性,从而得到活性更高、毒性更低的喜树碱衍生物。本发明制备了一系列20(S)-位磺酰脲喜树碱类化合物,以寻求更高活性的喜树碱衍生物。
发明内容
本发明的目的在于提供一类新的喜树碱磺酰脲类化合物,同时,本发明的另一目的是提供这一类新型化合物的制备方法及其在抗肿瘤药物中的用途。
本发明所述的喜树碱类化合物是指具有如下通式(I)所示的化合物:
其中(I)式中R1是氢、甲基、异丙基、2-(甲硫基)乙基。R2是甲基、正丁基、苯基、4-氟苯基、4-甲基苯基、4-氯苯基、2-噻吩基。
本发明所述的喜树碱类化合物制备方法按如下化学反应式l进行:
以喜树碱为反应原料,与多种不同取代N-Boc-氨基酸发生缩合反应得到中间体1a-d,再在50%的三氟乙酸/二氯甲烷溶液中脱去Boc基团得到中间体2a-d,最后通过与不同取代的磺酰氨基甲酸乙酯反应得到相应的喜树碱磺酰胺类化合物1-16。
本发明的化合物制备方法是将不同取代的20-氨基酸-喜树碱三氟乙酸盐2a-d(0.2mmol)溶于甲苯后,滴加适量的三乙胺,搅拌至澄清。将相应的磺酰氨基甲酸乙酯(0.4mmol)溶于甲苯后滴加到反应液中,加热回流3-4小时,TLC检测,反应完毕后,冷却至室温,减压除去溶剂,进行柱层析的到目标化合物。
经体外抗肿瘤活性筛选结果表明,式I的化合物对人肺腺癌细胞(A-549)、人乳腺癌细胞株(MDA-MB-231)、人口腔表皮样癌细胞(KB)和人口腔表皮样癌细胞耐药株(KBvin)表现出较强的抑制活性,且大部分化合物高于目前临床药物伊立替康,部分化合物活性与目前临床药物拓扑替康相当,因此,本发明的化合物可用于制备抗肿瘤的药物。本发明所述的喜树碱类化合物结构新颖、合成工艺简单、产品纯度高,对肿瘤细胞表现出较强的抑制作用,具有优良的应用前景。
以下通过具体实施方式,对本发明的上述内容做进一步的详细说明。但不应将此理解为对本发明的限制。
具体实施方式
实施例1:目标化合物1的合成
化合物1的合成按如下化学反应式2进行:
中间体1a的合成:将N-Boc-甘氨酸(6mmol)溶于干燥的二氯甲烷中,在℃温度下,依次加入喜树碱(3mmol),N,N'-二异丙基碳二亚胺(DIPC)(9mmol)和4-N,N-二甲氨基吡啶(DMAP)(6mmol)。在0℃反应约0.5h后,撤去冰浴后室温反应过夜。TCL检测,反应完毕后,过滤,反应混合液依次用6%碳酸氢钠溶液、水、饱和氯化钠溶液洗涤,然后用无水硫酸钠干燥,过滤,减压浓缩,过柱,得到产率中间体化合物1a。
中间体2a的合成:将合成得到的中间体1a(3mmol)溶于10mL干燥的二氯甲烷中然后慢慢滴加10mL三氟乙酸,室温下搅拌约1h,减压浓缩,得到粘稠状物质后用石油醚重结晶,得到中间体化合物2a。
化合物1的合成:将喜树碱衍生物2a(0.2mmol)溶于甲苯后,滴加适量的三乙胺,搅拌至澄清。将相应的甲基磺酰氨基甲酸乙酯(0.4mmol)溶于甲苯后滴加到反应液中,加热回流3-4小时,TLC检测,反应完毕后,冷却至室温,减压除去溶剂,进行柱层析的到目标化合物1。产物的检测数据如下:产率:56%;熔点:195-197℃;1H NMR(DMSO-d6,400MHz)δ:8.71(s,1H,C7-H),8.18(d,1H,J=8.4Hz,C9-H),8.15(d,1H,J=8.4Hz,C12-H),7.89(t,1H,J=6.8Hz,C10-H),7.73(t,1H,J=7.6Hz,C11-H),7.24(s,1H,C14-H),6.81(br,1H,L-glycine-NH),5.51(s,2H,C17-H),5.31(s,2H,C5-H),4.17(dd,1H,J=18.4,6.0Hz,C23-H),4.03(dd,1H,J=18.0,6.0Hz,C23-H),3.18(s,3H,Ms-CH3 ),2.16(m,2H,C18-H),0.93(t,3H,J=7.2Hz,C19-H);Anal.Calcd For C24H22N4O8S:C,54.75;H,4.21;N,10.64.Found:C,54.90;H,4.32;N,10.74.MS-ESI m/z:549.1[M+Na]+.
实施例2:目标化合物2的合成
实验步骤与实施例1同,仅以正丁基磺酰氨基甲酸乙酯代替甲基磺酰氨基甲酸乙酯。产物的检测数据如下:产率:38%;熔点:197-198℃;1HNMR(DMSO-d6,400MHz)δ:10.54(s,1H,SO2NH),8.70(s,1H,C7-H),8.15(m,2H,C12-H,C9-H),7.88(t,1H,J=6.8Hz,C10-H),7.73(t,1H,J=7.2Hz,C11-H),7.22(s,1H,C14-H),6.92(br,1H,L-glycine-NH),5.51(s,2H,C17-H),5.31(s,2H,C5-H),4.16(dd,1H,J=4.8,17.6Hz,C23-H),4.01(dd,1H,J=5.2,18.0Hz,C23-H),3.17(m,2H,-CH2 CH2CH2CH3),2.09-2.15(m,2H,C18-H),1.52-1.55(m,2H,-CH2 CH2 CH2CH3),1.15-1.2(m,2H,-CH2CH2 CH2 CH3),0.93(t,3H,J=7.6Hz,-CH2CH2CH2 CH3 ),0.68(t,3H,J=7.2Hz,C19-H);Anal.Calcd For C27H28N4O8S:C,57.03;H,4.96;N,9.85.Found:C,56.97;H,5.02;N,9.74.MS-ESI m/z:591.1[M+Na]+.
实施例3:目标化合物3的合成
实验步骤与实施例1同,仅以苯磺酰氨基甲酸乙酯代替甲基磺酰氨基甲酸乙酯。产物的检测数据如下:产率:40%;熔点:173-174℃;1H NMR(DMSO-d6,400MHz)δ:11.08(s,1H,SO2 NH),8.71(s,1H,C7-H),8.00-8.17(m,2H,C9-H,C12-H),7.45-7.90(m,7H,C10-H,C11-H,Ph-H),7.16(s,1H,C14-H),6.96(br,1H,L-glycine-NH),5.48(s,2H,C17-H),5.31(s,2H,C5-H),4.01(m,2H,C23-H),1.98(m,2H,C18-H),0.75(m,3H,C19-H);Anal.Calcd ForC29H24N4O8S:C,59.18;H,4.11;N,9.52.Found:C,59.12;H,4.02;N,9.44.MS-ESI m/z:611.5[M+Na]+.
实施例4:目标化合物4的合成
实验步骤与实施例1同,仅以对氟苯磺酰氨基甲酸乙酯代替甲基磺酰氨基甲酸乙酯。产物的检测数据如下:产率:50%;熔点:179-181℃;1H NMR(DMSO-d6,400MHz)δ:11.14(s,1H,SO2 NH),8.71(s,1H,C7-H),8.09-8.33(m,4H,C9-H,C12-H,p-FPh-H),7.89(t,1H,J=7.2Hz,C10-H),7.74(t,1H,J=6.8Hz,C11-H),7.28(t,2H,J=8.4Hz,p-FPh-H),7.17(s,1H,C14-H),6.99(br,1H,L-glycine-NH),5.49(s,2H,C17-H),5.30(s,2H,C5-H),4.07(d,1H,J=12.8Hz,C23-H),3.93(d,1H,J=13.6Hz,C23-H),2.00(m,2H,C18-H),0.75(m,3H,C19-H);Anal.Calcd For C29H23FN4O8S:C,57.42;H,3.82;N,9.24.Found:C,57.56;H,4.00;N,9.34.MS-ESI m/z:629.2[M+Na]+.
实施例5:目标化合物5的合成
实验步骤与实施例1同,仅以对甲基苯磺酰氨基甲酸乙酯代替甲基磺酰氨基甲酸乙酯。产物的检测数据如下:产率:50%;熔点:182-183℃;1H NMR(DMSO-d6,400MHz)δ:10.96(s,1H,Ts-NH),8.71(s,1H,C7-H),8.19(d,1H,J=8.8Hz,C9-H),8.15(d,1H,J=8.4Hz,C12-H),7.89(t,1H,J=7.6Hz,C10-H),7.85(d,2H,J=8.4Hz,Ts-H),7.73(t,1H,J=7.6Hz,C11-H),7.24(d,2H,J=8.0Hz,Ts-H),7.15(s,1H,C14-H),6.91(t,1H,J=5.2Hz,L-glycine-NH),5.48(s,2H,C17-H),5.30(s,2H,C5-H),4.08(dd,1H,J=18.0,5.6Hz,C23-H),3.93(dd,1H,J=17.6,5.2Hz,C23-H),2.26(s,3H,Ts-CH3 ),2.02(m,2H,C18-H),0.78(t,3H,J=7.2Hz,C19-H);Anal.Calcd For C30H26N4O8S:C,59.79;H,4.35;N,9.30.Found:C,59.82;H,4.54;N,9.24.MS-ESI m/z:625.4[M+Na]+.
实施例6:目标化合物6的合成
实验步骤与实施例1同,仅以对氯苯磺酰氨基甲酸乙酯代替甲基磺酰氨基甲酸乙酯。产物的检测数据如下:产率:51%;熔点:181-183℃;1H NMR(DMSO-d6,400MHz)δ:11.21(s,1H,SO2 NH),8.72(s,1H,C7-H),8.17(m,2H,C9-H,C12-H),8.01(d,2H,J=7.2Hz,p-ClPh-H),7.90(t,1H,J=7.2Hz,C10-H),7.74(t,1H,J=6.8Hz,C11-H),7.51(t,2H,J=7.6Hz,p-ClPh-H),7.15(s,1H,C14-H),6.98(br,1H,L-glycine-NH),5.48(s,2H,C17-H),5.31(s,2H,C5-H),3.90-4.08(m,2H,C23-H),2.00-2.09(m,2H,C18-H),0.85(m,3H,C19-H);Anal.CalcdFor C29H23ClN4O8S:C,55.91;H,3.72;N,8.99.Found:C,55.99;H,3.80;N,9.04.MS-ESI m/z:661.0[M+K]+.
实施例7:目标化合物7的合成
实验步骤与实施例1同,仅以2-噻吩磺酰氨基甲酸乙酯代替甲基磺酰氨基甲酸乙酯。产物的检测数据如下:产率:50%;熔点:205-207℃;1H NMR(DMSO-d6,400MHz)δ:11.19(s,1H,SO2 NH),8.71(s,1H,C7-H),8.19(d,1H,J=8.4Hz,C9-H),8.14(d,1H,J=8.0Hz,C12-H),7.89(t,1H,J=7.2Hz,C10-H),7.80(m,2H,thiophene-H),7.73(t,1H,J=7.2Hz,C11-H),7.17(s,1H,C14-H),6.93(m,2H,thiophene-H,L-glycine-NH),5.49(s,2H,C17-H),5.30(s,2H,C5-H),4.10(dd,1H,J=5.6,18.0Hz,C23-H),3.97(dd,1H,J=5.2,18.4Hz,C23-H),2.05(m,2H,C18-H),0.84(m,3H,C19-H);Anal.Calcd For C27H22N4O8S2:C,54.54;H,3.73;N,9.42.Found:C,54.47;H,4.02;N,9.54.MS-ESI m/z:595.2[M+H]+.
实施例8:目标化合物8的合成
实验步骤与实施例1同,仅以N-Boc-丙氨酸代替N-Boc-甘氨酸。产物的检测数据如下:产率:43%;熔点:172-174℃;1H NMR(DMSO-d6,400MHz)δ:10.33(s,1H,SO2NH),8.70(s,1H,C7-H),8.15(m,2H,C12-H,C9-H),7.88(t,1H,J=8.4Hz,C10-H),7.69-7.74(m,1H,C11-H),7.20(s,1H,C14-H),7.03(d,1H,J=6.4Hz,L-alanine-NH),5.51(s,2H,C17-H),5.30(s,2H,C5-H),4.11-4.39(m,1H,C23-H),3.40(s,3H,Ms-CH3 ),2.12-2.22(m,2H,C18-H),1.43(d,3H,J=7.6Hz,L-alanine-CH3 ),0.94(m,3H,J=6.4Hz,C19-H);Anal.Calcd ForC25H24N4O8S:C,55.55;H,4.48;N,10.36.Found:C,55.63;H,4.32;N,10.45.MS-ESI m/z:563.1[M+Na]+.
实施例9:目标化合物9的合成
实验步骤与实施例1同,仅以N-Boc-丙氨酸代替N-Boc-甘氨酸,对氟苯磺酰氨基甲酸乙酯代替甲基磺酰氨基甲酸乙酯。产物的检测数据如下:产率:40%;熔点:150-152℃;1HNMR(DMSO-d6,400MHz)δ:10.86(s,1H,SO2NH),8.73(s,1H,C7-H),8.28(m,2H,p-FPh-H),8.18(m,2H,C12-H,C9-H),7.89(t,1H,J=7.2Hz,C10-H),7.74(t,1H,J=7.6Hz,C11-H),7.25(t,2H,J=8.4Hz,p-FPh-H),7.14(s,1H,C14-H),7.02(d,1H,J=6.0Hz,L-alanine-NH),5.48(s,2H,C17-H),5.32(s,2H,C5-H),4.11-4.24(m,1H,C23-H),1.89-2.01(m,2H,C18-H),1.36(d,3H,J=6.8Hz,L-alanine-CH3 ),0.61(t,3H,J=7.2Hz,C19-H);Anal.Calcd ForC30H25FN4O8S:C,58.06;H,4.06;N,9.03.Found:C,58.12;H,4.02;N,8.96.MS-ESI m/z:621.2[M+H]+.
实施例10:目标化合物10的合成
实验步骤与实施例1同,仅以N-Boc-丙氨酸代替N-Boc-甘氨酸,对甲基苯磺酰氨基甲酸乙酯代替甲基磺酰氨基甲酸乙酯。产物的检测数据如下:产率:47%;熔点:168-170℃;1H NMR(DMSO-d6,400MHz)δ:10.67(s,1H,Ts-NH),8.74(s,1H,C7-H),8.16-8.24(m,2H,C9-H,C12-H),8.05(d,2H,J=8.0Hz,Ts-H),7.90(t,1H,J=7.6Hz,C10-H),7.74(t,1H,J=7.6Hz,C11-H),7.27(d,2H,J=8.0Hz,Ts-H),7.13(s,1H,C14-H),6.91(d,1H,J=6.4Hz,L-alanine-NH),5.48(s,2H,C17-H),5.33(s,2H,C5-H),4.24(m,1H,C23-H),2.24(s,3H,Ts-CH3 ),1.92-2.04(m,2H,C18-H),1.36(d,3H,J=7.6Hz,L-alanine-CH3 ),0.68(t,3H,J=6.8Hz,C19-H);Anal.Calcd For C31H28N4O9S:C,60.38;H,4.58;N,9.09.Found:C,60.30;H,4.52;N,8.99.MS-ESI m/z:617.3[M+H]+.
实施例11:目标化合物11的合成
实验步骤与实施例1同,仅以N-Boc-丙氨酸代替N-Boc-甘氨酸,2-噻吩磺酰氨基甲酸乙酯代替甲基磺酰氨基甲酸乙酯。产物的检测数据如下:产率:51%;熔点:167-169℃;1HNMR(DMSO-d6,400MHz)δ:10.98(s,1H,SO2 NH),8.74(s,1H,C7-H),8.15-8.22(m,2H,C9-H,C12-H),7.85-7.91(m,2H,C10-H,thiophene-H),7.67-7.77(m,2H,C11-H,thiophene-H),7.13(s,1H,C14-H),6.96(m,2H,L-alanine-NH,thiophene-H),5.49(s,2H,C17-H),5.31(s,2H,C5-H),4.29(m,1H,C23-H),1.96-2.08(m,2H,C18-H),1.36(m,3H,L-alanine-CH3 ),0.73(t,3H,J=7.2Hz,C19-H);Anal.Calcd For C28H24N4O8S2:C,55.25;H,3.97;N,9.21.Found:C,55.36;H,4.02;N,9.37.MS-ESI m/z:609.3[M+H]+.
实施例12:目标化合物12的合成
实验步骤与实施例1同,仅以N-Boc-缬氨酸代替N-Boc-甘氨酸。产物的检测数据如下:产率:49%;熔点:198-200℃;1H NMR(DMSO-d6,400MHz)δ:10.08(br,1H,Ms-NH),8.69(s,1H,C7-H),8.12-8.17(m,2H,C9-H,C12-H),7.88(t,1H,J=6.8Hz,C10-H),7.72(t,1H,J=7.2Hz,C11-H),7.19(s,1H,C14-H),6.83(m,1H,L-valine-NH),5.56(s,2H,C17-H),5.29(s,2H,C5-H),4.13(m,1H,C23-H),3.06(s,3H,Ms-CH3 ),2.30(m,1H,L-valine-CH(CH3)2),2.18(m,2H,C18-H),0.69-1.03(m,9H,C19-H,L-valine-CH(CH3) 2));Anal.Calcd ForC32H29N4O8S:C,57.03;H,4.96;N,9.85.Found:C,56.95;H,5.02;N,9.89.MS-ESI m/z:569.2[M+H]+.
实施例13:目标化合物13的合成
实验步骤与实施例1同,仅以N-Boc-缬氨酸代替N-Boc-甘氨酸,对氟苯磺酰氨基甲酸乙酯代替甲基磺酰氨基甲酸乙酯。产物的检测数据如下:产率:46%;熔点:215-217℃;1HNMR(DMSO-d6,400MHz)δ:10.66(br,1H,SO2NH),8.72(s,1H,C7-H),8.14-8.20(m,2H,C9-H,C12-H),7.88-7.97(m,2H,p-FPh-H),7.33-7.49(m,2H,p-FPh-H),7.26(t,1H,J=8.8Hz,C10-H),7.19(t,1H,J=8.8Hz,C11-H),7.12(s,1H,C14-H),6.80(m,1H,L-valine-NH),5.49(d,2H,J=6.4Hz,C17-H),5.29(d,2H,J=9.6Hz,C5-H),3.97-4.02(m,1H,C23-H),2.23-2.33(m,1H,L-valine-CH(CH3)2),1.90-2.14(m,2H,C18-H),0.79-0.94(m,9H,C19-H,L-valine-CH(CH3) 2);Anal.Calcd For C32H29FN4O8S:C,59.25;H,4.51;N,8.64.Found:C,59.03;H,4.44;N,8.971.MS-ESI m/z:671.4[M+Na]+.
实施例14:目标化合物14的合成
实验步骤与实施例1同,仅以N-Boc-缬氨酸代替N-Boc-甘氨酸,2-噻吩磺酰氨基甲酸乙酯代替甲基磺酰氨基甲酸乙酯。产物的检测数据如下:产率:50%;熔点:217-218℃;1HNMR(DMSO-d6,400MHz)δ:174(s,1H,SO2 NH),8.71(s,1H,C7-H),8.14-8.21(m,2H,C9-H,C12-H),7.89(m,2H,C10-H,thiophene-H),7.73(m,2H,C11-H,thiophene-H),7.08(s,1H,C14-H),6.98(t,1H,J=4.4Hz,thiophene-H),6.76(m,1H,L-alaine-NH),5.49(s,2H,C17-H),5.31(s,2H,C5-H),4.04(q,1H,J=7.2Hz,C23-H),2.22-2.33(m,1H,L-alaine-CH(CH3)2),1.92-2.01(m,2H,C18-H),0.75-0.95(m,9H,C19-H,L-alaine-CH(CH3) 2);Anal.Calcd ForC30H28N4O8S2:C,56.59;H,4.43;N,8.80.Found:C,56.47;H,4.34;N,8.91.MS-ESI m/z:659.2[M+Na]+.
实施例15:目标化合物15的合成
实验步骤与实施例1同,仅以N-Boc-蛋氨酸代替N-Boc-甘氨酸,2-噻吩磺酰氨基甲酸乙酯代替甲基磺酰氨基甲酸乙酯。产物的检测数据如下:产率:43%;熔点:159-160℃;1HNMR(DMSO-d6,400MHz)δ:11.01(s,1H,SO2 NH),8.72(s,1H,C7-H),8.14-8.22(m 2H,C9-H,C12-H),7.87(m,2H,C10-H,thiophene-H),7.74(d,1H,J=8.8Hz,thiophene-H),7.70(t,1H,J=4.4Hz,C11-H),7.20(s,1H,C14-H),7.11(m,1H,thiophene-H),6.97(t,1H,J=4.8Hz,L-methionine-NH),5.50(d,2H,J=5.6Hz,C17-H),5.31(s,2H,C5-H),4.41-4.61(m,1H,C23-H),1.96-2.33(m,6H,L-methionine-CH2CH2 SCH3,C18-H),0.84-0.91(m,3H,L-methionine-CH2CH2SCH3 ),0.75(t,3H,J=7.2Hz,C19-H);Anal.Calcd For C30H28N4O8S3:C,53.88;H,4.22;N,8.38.Found:C,54.98;H,4.14;N,8.25.MS-ESI m/z:691.1[M+Na]+.
实施例16:目标化合物16的合成
实验步骤与实施例1同,仅以N-Boc-蛋氨酸代替N-Boc-甘氨酸,对氟苯磺酰氨基甲酸乙酯代替甲基磺酰氨基甲酸乙酯。产物的检测数据如下:产率:45%;熔点:152-154℃;1HNMR(DMSO-d6,400MHz)δ:10.86(s,1H,SO2 NH),8.72(s,1H,C7-H),8.17-8.32(m 4H,C9-H,C12-H,p-FPh-H),8.00(m,1H,C10-H),7.74(t,1H,J=7.2Hz,C11-H),7.11-7.28(m,4H,p-FPh-H,C14-H,L-methionine-NH),5.49(d,2H,J=7.2Hz,C17-H),5.31(d,2H,J=7.2Hz,C5-H),4.34(m,1H,C23-H),1.92-2.33(m,9H,L-methionine-CH2CH2SCH3 ,C18-H),0.82(t,3H,J=6.8Hz,C19-H);Anal.Calcd For C32H29FN4O8S2:C,56.46;H,4.29;N,8.23.Found:C,56.67;H,4.04;N,8.20.MS-ESI m/z:703.1[M+Na]+.
实施例17:化合物1-16的细胞毒活性的试验方法及结果
本发明的药理实验采用磺酰罗丹明B(Sulforhodamine B,SRB)比色法。肿瘤细胞培养选用10%胎牛血清(FBS)的RPMI-1640培养基,将肿瘤细胞接种于96孔板,每个孔培养3-5×103个细胞,加入不同浓度的待测试目标化合物溶液。培养72小时后,每孔加入预冷的三氯乙酸溶液(50%,w/v)固定细胞,冰箱中固定30分钟。待96孔板室温下晾干后,每孔加入0.04%(w/v)的SRB染液(1%的乙酸配制,购自Sigma Chemical公司),染色30min后倒掉染液,用乙酸冲洗4次,去除未结合的染料,室温晾干。用100μL非缓冲Tris-base碱液溶解与细胞蛋白结合的染料,水平摇床上振荡20min,采用ELx800吸收光酶标仪(美国Bio-TeK公司生产,操作软件Gen5)测定515nm处光吸收值。所有试验设3个平行组或重复3次。化合物1-16的细胞毒活性测试结果见表1。
表1化合物1-16的细胞毒活性试验结果
注:(1)筛选方法:磺酰罗丹明B比色法;(2)作用时间:48小时;(3)化合物编号1-16分别为前述实施例1至实施例16所得产物。
对四种肿瘤细胞体外细胞毒活性测试结果显示,本发明所合成的化合物1-16对人肺腺癌细胞(A-549)、人乳腺癌细胞株(MDA-MB-231)、人口腔表皮样癌细胞(KB)和人口腔表皮样癌细胞耐药株(KBvin)等肿瘤细胞表现出良好的抑制活性,且大部分化合物的体外细胞毒活性高于临床药物拓扑替康,部分化合物与临床药物伊立替康相当,因此本发明所制得化合物可用于制备抗肿瘤药物,表现出较好的应用前景。
Claims (8)
2.根据权利要求1所述的一种喜树碱磺酰脲类化合物的制备方法,其特征在于将不同的20-氨基酸-喜树碱三氟乙酸盐(0.2mmol)溶于甲苯后,滴加适量的三乙胺,搅拌至澄清。将相应的磺酰氨基甲酸乙酯(0.4mmol)溶于甲苯后滴加到反应液中,加热回流3-4小时,TLC检测,反应完毕后,冷却至室温,减压除去溶剂,进行柱层析的到目标化合物。
3.根据权利要求2所述的方法,其特征在于层析用硅胶柱采用200~300目的柱层析用硅胶。
4.根据权利要求1所述的一种喜树碱磺酰脲类化合物用于制备抗肿瘤药物。
5.根据权利要求1所述的一种喜树碱磺酰脲类化合物在制备治疗人肺腺癌(A549)的药物中的应用。
6.根据权利要求1所述的一种喜树碱磺酰脲类化合物在制备治疗人乳腺癌(MDA-MB-231)的药物中的应用。
7.根据权利要求1所述的一种喜树碱磺酰脲类化合物在制备治疗人口腔表皮样癌(KB)的药物中的应用。
8.根据权利要求1所述的一种喜树碱磺酰脲类化合物在制备治疗人口腔表皮样癌耐药株(KBvin)的药物中的应用。
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