CN104672125B - 一种吲哚酰腙化合物 - Google Patents

一种吲哚酰腙化合物 Download PDF

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CN104672125B
CN104672125B CN201510112197.2A CN201510112197A CN104672125B CN 104672125 B CN104672125 B CN 104672125B CN 201510112197 A CN201510112197 A CN 201510112197A CN 104672125 B CN104672125 B CN 104672125B
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索有瑞
叶英
杨永晶
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Northwest Institute of Plateau Biology of CAS
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    • C07ORGANIC CHEMISTRY
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    • C07D209/00Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom
    • C07D209/02Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom condensed with one carbocyclic ring
    • C07D209/04Indoles; Hydrogenated indoles
    • C07D209/30Indoles; Hydrogenated indoles with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, directly attached to carbon atoms of the hetero ring
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    • C07DHETEROCYCLIC COMPOUNDS
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    • C07D209/02Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom condensed with one carbocyclic ring
    • C07D209/04Indoles; Hydrogenated indoles
    • C07D209/10Indoles; Hydrogenated indoles with substituted hydrocarbon radicals attached to carbon atoms of the hetero ring
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Abstract

本发明提供了如式I所示化合物,其中,R与吲哚基的2或3位碳原子相连;R选自无或C1~3的烷撑。本发明双吲哚酰腙类分子钳对所考察的苹果酸、酒石酸、抗坏血酸、色氨酸具有良好的识别配合作用,而对所考察的其他有机酸如乳酸、草酸、酪氨酸、组氨酸、丝氨酸等无识别配合作用,因此,该类分子钳受体的选择性识别性能有望应用于生物医药中相关有机酸的分析、分离及有机酸类药物的转运等领域。

Description

一种吲哚酰腙化合物
技术领域
本发明涉及一种吲哚酰腙化合物。
背景技术
不同类型的人工受体的合成及分子识别性能研究成为现代生物有机化学 的研究热点。通过人工受体的分子识别性能研究可以更好地了解受体与底物 分子之间的相互作用,从而开拓出更新颖、更有效的分子器件与催化剂应用 于生物传感、新药合成、手性拆分、仿生催化等领域。钳形受体因其易于将 功能团聚集在受体与底物结合的活性部位上引起人们极大的兴趣,并且在生 命科学和化学领域应用研究中占得一席之地。
发明内容
本发明的目的在于提供一种新化合物。本发明的另一目的在于提供该类 化合物的用途。
具体地,本发明提供了如式I所示化合物:
其中,R与吲哚基的2或3位碳原子相连;R选自无或C1~3的烷撑。
进一步地,R与吲哚基的3位碳原子相连;R选自无。
本发明还提供了上述化合物的合成方法,它包括如下操作步骤:
(1)中间体化合物2的制备:
取5~15mmol化合物1,8~15ml无水甲醇,0.2~1.0ml浓硫酸,加 热回流,TLC监测反应进程,待反应完全,将反应物冷却至室温,倒入冰水 中,调节pH至中性,过滤,干燥,得化合物2;
(2)中间体化合物3的制备:
取5.0mmol化合物2,1~8mL 80%~98%w/w的水合肼,于250~450W 微波功率下回流反应,TLC监测反应进程,待反应完全,停止反应,反应 物冷却后析出固体,过滤,干燥,得中间体3;
(3)式I化合物的制备:
取1.0~1.5mmol中间体3,3~5ml DMF,0.5~1.0ml36%~99%w/w 乙酸,0.5~0.75mmol对苯二甲醛,于350~500W微波功率下回流反应, TLC监测反应进程,待反应完全,停止反应,反应物冷却至室温,往反应体 系中加入20~50mL水,产生大量固体,过滤,得粗品,重结晶,得目标物。
进一步地,步骤(1)中,化合物1用量为9mmol,无水甲醇用量为10ml, 浓硫酸用量为0.5ml。
进一步地,步骤(2)中,水合肼用量为3~7ml;优选地,水合肼用量为 3~5ml;进一步地,步骤(2)中,水合肼的浓度为80%w/w。
进一步地,步骤(3)中,中间体3与对苯二甲醛的摩尔用量比为1∶3; 优选地,中间体3的用量为1.5mmol,DMF用量为3ml,乙酸用量为0.5ml; 进一步地,步骤(3)中,乙酸浓度为36%w/w。
进一步地,步骤(2)中,微波功率为300W;步骤(3)中,微波功率 为450W。
进一步地,步骤(3)中,重结晶所用溶剂为DMF-乙醇-水=1∶1∶10v/v/v。
本发明还提供了上述化合物在紫外分光光度法中检测或识别有机酸的应 用。
本发明一个具体实施方式中,所述有机酸为苹果酸、酒石酸、抗坏血酸 或色氨酸。
本发明一个具体实施方式中,所述紫外分光光度法中,选择DMSO作为 溶剂体系。
本发明的一种实施方式中,还包括了同位素标记的上述化合物,所述同
本发明双吲哚酰腙类分子钳对所考察的苹果酸、酒石酸、抗坏血酸、色 氨酸具有良好的识别配合作用,而对所考察的其他有机酸如乳酸、草酸、酪 氨酸、组氨酸、丝氨酸等无识别配合作用,因此,该类分子钳受体的选择性 识别性能有望应用于生物医药中相关有机酸的分析、分离及有机酸类药物的 转运等领域。
本发明化合物制备方法,快速、高效、溶剂用量小,且目标化合物收率 较高,为进一步研究式I化合物或相关化合物提供了必要基础。
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,还可以做出其他多种形式的修改、 替换或变更。
以下通过具体实施例的形式,对本发明的上述内容再做进一步的详细说 明。但不应将此理解为本发明上述主题的范围仅限于以下的实施例。凡基于 本发明上述内容所实现的技术均属于本发明的范围。
附图说明
图1 化合物4e中加入苹果酸的UV谱图
图2 25℃时,化合物4e与苹果酸形成配合物的1/ΔA对1/[G]0作图
具体实施方式
本发明所用仪器与试剂:
核磁共振仪:Varian INOVA-400MHz,TMS为内标,DMSO为溶剂;质谱 仪:FINNIGAN-LCQDECA型;红外光谱仪:TFS-40型,KBr压片;紫外可见 光谱仪:北京普析TU-1901型分光光度计;元素分析仪:Carlo-Erba-1106型; 熔点仪:XT-4型熔点测定仪;微波反应器:北京祥鹄科技公司商用微波反应 器XH-100A.
所用试剂均为市售化学纯或分析纯.
实施例1 本发明化合物的合成
本发明中吲哚(Indole)的C原子排序编号如下:
本发明化合物制备途径如下:
(1)中间体2d-2h的合成
在50mL三颈瓶中加入9mmol原料1,10ml无水甲醇,0.5ml浓硫酸, 80℃下加热回流2-3h(TLC监测反应进程),待反应物冷却至室温,倒入冰水 中,Na2CO3中和至PH≈7,过滤,干燥,得白色固体2,收率91%~99%.
(2)中间体3的微波合成与表征
在50mL三颈瓶中加入5mmol中间体2,3mL 80%的水合肼,于300W 微波功率下回流反应5-8min(TLC监测反应进程),停止反应,冷却后析出固 体,过滤,干燥,得中间体3,收率87%~98%.
3d:白色固体,收率97%,m.p.251~253℃;1H NMR(400MHz,DMSO-d6) δ:11.60(s,1H,indole-NH),9.78(s,1H,CONH),7.59(d,J=8.0Hz,1H,ArH), 7.43(d,J=8.0Hz,1H,ArH),7.16(t,J=7.6Hz,1H,ArH),7.08(s,1H, indole-CH in 3-moiety),7.02(d,J=7.6Hz,1H,ArH),4.50(s,2H,NH2);IR(KBr) v:3305,3302,3064,1625,1540,1425,1314,745cm-1;ESI-MS m/z(%):174 ([M-1]+,100).Anal.calcd for C9H9N3O:C 61.70,H 5.18,N23.99;Found:C 61.63, H 5.15,N 23.81.
3e:白色固体,收率98%,m.p.265~266℃;1H NMR(400MHz,DMSO-d6) δ:11.52(s,1H,indole-NH),9.15(s,1H,CONH),8.13(d,J=7.6Hz,1H,ArH), 7.96(s,1H,indole-CH in2-moiety),7.42(d,J=7.6Hz,1H,ArH),7.16~7.07(m,2H,ArH),4.31(s,2H,NH2);IR(KBr)v:3412,3299,2926,1621,1535,1433, 1223,748cm-1;ESI-MS m/z(%):174([M-1]+,100).Anal.calcd for C9H9N3O:C 61.70,H 5.18,N 23.99;Found:C 61.69,H 5.13,N 23.92.
3f:白色固体,收率87%,m.p.183~185℃;1H NMR(400MHz,DMSO-d6) δ:10.85(s,1H,indole-NH),9.11(s,1H,CONH),7.56(d,J=8.0Hz,1H,ArH), 7.32(d,J=7.6Hz,1H,ArH),7.17(s,1H,indole-CH in 2-moiety),7.05(t,J=7.6 Hz,1H,ArH),6.96(t,J=7.6Hz,1H,ArH),4.19(s,2H,NH2),3.44(s,2H,CH2); IR(KBr)v:3285,3044,2915,1649,1514,1426,1357,743cm-1;ESI-MS m/z(%): 401([2M+Na]+,100).Anal.calcd forC10H11N3O:C 63.48,H 5.86,N 22.21;Found: C 63.50,H 5.76,N 22.41.
3g:白色固体,收率92%,m.p.124~125℃;1H NMR(400MHz,DMS0-d6) δ:10.76(s,1H,indole-NH),9.00(s,1H,CONH),7.51(d,J=8.0Hz,1H,ArH), 7.32(d,J=8.0Hz,1H,ArH),7.09(s,1H,indole-CH in 2-moiety),7.06(t,J=7.6 Hz,1H,ArH),6.97(t,J=8.0Hz,1H,ArH),4.18(s,2H,NH2),2.91(t,J=8.0Hz, 2H,CH2),2.39(t,J=8.0Hz,2H,CH2);IR(KBr)v:3308,3024,2924,1637,1525, 1441,1230,738cm-1;ESI-MS m/z(%):429([2M+Na]+,100).Anal.calcd for C11H13N3O:C 65.01,H 6.45,N 20.68;Found:C 65.25,H 6.25,N 20.56.
3h:白色固体,收率95%,m.p.113~114℃;1H NMR(400MHz,DMSO-d6) δ:10.76(s,1H,indole-NH),8.95(s,1H,CONH),7.49(d,J=8.0Hz,1H,ArH), 7.32(d,J=7.6Hz,1H,ArH),7.10(s,1H,indole-CH in 2-moiety),7.05(t,J=8.0 Hz,1H,ArH),6.96(t,J=7.6Hz,1H,ArH),4.18(s,2H,NH2),2.66(t,J=7.6Hz, 2H,CH2),2.09(t,J=6.4Hz,2H,CH2),1.86(t,J=6.8Hz,2H,CH2);IR(KBr)v: 3319,3268,3048,1666,1623,1525,1448,1210,730cm-1;ESI-MS m/z(%):218 ([M+1]+,100).Anal.calcd for C12H15N3O:C 66.34,H 6.96,N 19.34;Found:C 66.45,H 6.86,N 19.30.
(3)目标物4的微波合成与表征
在50mL三颈瓶中依次加入1.5mmol中间体3,3ml DMF,0.5ml乙酸 (36%),0.5mmol对苯二甲醛,于450W微波功率下回流反应5-10min(TLC 监测反应进程),停止反应,冷却至室温,往反应体系中加入30mL水,产 生大量固体,过滤,得粗品,用DMF-乙醇-水重结晶,得目标物4.
4d:黄色固体,收率99%,m.p.236~238℃;1H NMR(400MHz,DMSO-d6) δ:12.01(s,1H,indole-NH),11.86(s,1H,indole-NH),11.60(s,1H,CONH),9.78 (s,1H,CONH),8.50(s,1H,NCH),7.87(s,2H,NCH+ArH),7.70(d,J=7.6Hz, 2H,ArH),7.59(d,J=8.0Hz,1H,ArH),7.48(d,J=8.0Hz,2H,ArH),7.42(d,J =8.4Hz,1H,ArH),7.36(s,1H,indole-CH in 3-moiety),7.24(t,J=7.2Hz,2H, ArH),7.16(t,J=7.6Hz,1H,ArH),7.11~7.07(m,2H,indole-CH in 3-moiety +ArH),7.02(t,J=7.6Hz,1H,ArH);IR(KBr)v:3436,3257,3062,1613,1535, 1319,1226,1123,743cm-1;ESI-MS m/z(%):919([2M+Na]+,100).Anal.calcdfor C26H20N6O2:C 69.63,H 4.49,N 18.74;Found:C 69.73,H 4.51,N 18.76.
4e:黄色固体,收率99%,m.p.>300℃;1H NMR(400MHz,DMSO-d6) δ:11.78(s,2H,indole-NH),11.48(s,2H,CONH),8.34(s,3H,NCH+indole-CH in 2-moiety),8.22(d,J=6.4Hz,3H,indole-CH in 2-moiety+2ArH),7.80(s,4H,ArH),7.49(d,J=8.0Hz,2H,ArH),7.23~7.15(m,4H,ArH);IR(KBr)v:3412, 3230,3050,1618,1536,1433,1312,1192,737cm-1;ESI-MS m/z(%):919([2M+ Na]+,100).Anal.calcd for C26H20N6O2:C 69.63,H 4.49,N18.74;Found:C 69.69, H 4.53,N 18.1.
4f:黄色固体,收率99%,m.p.294~296℃;1H NMR(400MHz,DMSO-d6) δ:11.61(s,1H,indole-NH),11.37(s,1H,indole-NH),10.93(s,1H,CONH),10.88 (s,1H,CONH),8.23(d,J=7.6Hz,1H,NCH),8.01(d,J=5.6Hz,1H,NCH), 7.78(s,2H,indole-CH in 2-moiety),7.40(t,J=8.0Hz,2H,ArH),7.58(s,2H, ArH),7.37~7.32(m,2H,ArH),7.26~7.24(m,2H,ArH),7.10~7.04(m,2H, ArH),7.01~6.94(m,2H,ArH),4.07(s,2H,CH2),3.65(s,2H,CH2);IR(KBr)v: 3385,3251,2923,1666,1535,1367,1264,1053,743cm-1;ESI-MS m/z(%):975 ([2M+Na]+,100).Anal.calcd for C28H24N6O2:C 70.57,H 5.08,N 17.64;Found:C 70.61,H 5.15,N 17.60.
4g:黄色固体,收率93%,m.p.243~246℃;1H NMR(400MHz,DMSO-d6) δ:11.45(d,J=8.4Hz,1H,indole-NH),11.34(d,J=3.6Hz,1H,indole-NH), 10.79(s,2H,CONH),8.14(s,1H,NCH),7.99(d,J=9.2Hz,1H,NCH),7.73(s, 2H,indole-CH in 2-moiety),7.69(s,1H,ArH),7.65(s,1H,ArH),7.56(d,J=8.0 Hz,2H,ArH),7.33(d,J=8.0Hz,2H,ArH),7.14(d,J=8.0Hz,2H,ArH),7.09~ 7.03(m,2H,ArH),7.00~6.95(m,2H,ArH),3.03~3.00(m,6H,CH2),2.59(d,J =6.4Hz,2H,CH2);IR(KBr)v:3406,3207,3051,1665,1551,1350,1214,1157, 738cm-1;ESI-MS m/z(%):1031([2M+Na]+,100).Anal.calcd for C30H28N6O2:C71.41,H 5.59,N 16.66;Found:C 71.50,H 5.65,N 16.60.
4h:黄色固体,收率99%,m.p.224~225℃;1H NMR(400MHz,DMSO-d6) δ:11.42(s,1H,indole-NH),11.30(s,1H,indole-NH),10.79(s,2H,CONH),8.15 (s,1H,NCH),7.96(d,J=4.8Hz,1H,NCH),7.70(d,J=8.4Hz,2H,ArH),7.61 (d,J=8.4Hz,1H,ArH),7.56~7.53(m,3H,ArH),7.34(d,J=8.4Hz,2H,ArH), 7.14(s,2H,indole-CH in 2-moiety),7.06(t,J=7.2Hz,2H,ArH),6.99~6.94(m, 2H,ArH),2.80~2.70(m,6H,CH2),2.28(t,J=7.6Hz,2H,CH2),1.96(m,4H, CH2);IR(KBr)v:3401,3080,2936,1659,1403,1338,1209,1136,737cm-1; ESI-MS m/z(%):1087([2M+Na]+,80).Anal.calcd for C32H32N6O2:C 72.16,H6.06,N 15.78;Found:C 72.25,H 6.10,N 15.68.
实施例2 本发明化合物对有机酸识别性能研究方法
用DMSO配制浓度为1×10-4~10×10-5mol·L-1的本发明化合物溶液及初 始浓度为1.0×10-5mol·L-1的有机酸溶液。测定本发明化合物的吸光度值,然 后不断加入一定量的有机酸(加入有机酸溶液的总体积不超过100μL),使其 浓度保持在10-4~10-3mol·L-1,测定各组配合物溶液的吸光度值,同时采用相 同浓度的客体DMSO液作参比液。测定温度控制在(25±0.1)℃,吸光度误差不 超过0.002.
当固定本发明化合物的浓度,不断加入有机酸溶液时,随着有机酸的不断 加入,吸光度值呈规律性下降,表明所考察的有机酸化合物进入本发明化合 物分子裂穴并产生了识别配合作用,典型的紫外吸收变化图谱见图1。
根据Hildebrand-Benes方程,若实验中固定主体浓度,则可得变形后方程 式(1),以1/[G]0对1/ΔA作图即得一条直线,说明主客体间形成1∶1型配 合物,然后再根据直线的截距1/a和斜率1/Ka·a可求出配合物的结合常数 Ka值,根据式(2)计算出自由能变化值-ΔG0
ΔG0=-RT lnKa (2)
由图1、图2可看出,苹果酸与本发明化合物4e产生识别配合作用,形成 了1∶1型超分子配合物,同样,4e也能与酒石酸、抗坏血酸、色氨酸形成1∶1 型超分子配合物,其相关配合物的结合常数(Ka)和自由能变化值(-ΔG0) 列于表1。
当固定主体浓度,不断加入不同浓度的乳酸、酪氨酸、组氨酸等其他有机 酸时,溶液的吸光度值无明显变化,说明本发明化合物对乳酸、酪氨酸、组 氨酸等无配合作用,而对苹果酸、酒石酸、抗坏血酸及色氨酸具有选择性识 别配合能力。
表1 25℃时,在DMSO溶液中,化合物4e与苹果酸、酒石酸、抗坏血酸、色氨酸形成配合物的结 合常数(Ka)和自由能变化值(-ΔG0)
结果与讨论:
1中间体3的合成
将微波辐射技术应用于中间体3的合成中,反应时间由常规合成法的2-3 h小时缩短为5-8min,产率由常规合成法的60%~70%提高至85%~98%, 且极大减少溶剂用量,此反应中,水合肼既作溶剂又作反应物.
由于水合肼沸点较高不易蒸出,为了便于目标产物的析出,水合肼的用量 不宜过多,经反复实验得水合肼的最佳用量为:每5mmol原料2加入3-5ml 水合肼.反应完全后需充分冷却才能得到固体粗品3,如冷至室温后未见固体 析出可放置冰箱冷冻过夜.
2目标物4的合成
对苯二甲醛与中间体3的配比影响目标物的产率,当两者投料比恰好为 1∶2时,对苯二甲醛反应不完全,产率仅为60%-78%,适当增加中间体3的用 量可有效提高目标物的产率,经摸索得最佳投料比为对苯二甲醛∶中间体 3=1∶3,此时目标物4的产率可提高至84%-99%.
采用微波法与常规法分别合成目标物4,两种不同加热方法的反应时间、 溶剂用量、产率列于表2.从表中可以看出,与常规加热方法相比,微波合成 法能大大缩短反应时间、提高反应产率、减少溶剂用量等.
表2微波法与常规法合成目标物4的比较
atc,传统加热时间;tmw,微波辐射时间。

Claims (2)

1.式I所述化合物在紫外分光光度法中检测或识别苹果酸、酒石酸、抗坏血酸或色氨酸的应用,
R与吲哚基的3位碳原子相连;R选自无。
2.根据权利要求1所述的应用,其特征在于:紫外分光光度法中,选择DMSO作为溶剂体系。
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