CN106496275A - 与Aβ斑块具有高亲和力的N2S2类2‑芳基苯并噻唑化合物及其制备方法与应用 - Google Patents
与Aβ斑块具有高亲和力的N2S2类2‑芳基苯并噻唑化合物及其制备方法与应用 Download PDFInfo
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- A61K51/04—Organic compounds
- A61K51/041—Heterocyclic compounds
- A61K51/044—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine, rifamycins
- A61K51/0453—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine, rifamycins having five-membered rings with two or more ring hetero atoms, at least one of which being nitrogen, e.g. tetrazole
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- C07D277/00—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings
- C07D277/60—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings condensed with carbocyclic rings or ring systems
- C07D277/62—Benzothiazoles
- C07D277/64—Benzothiazoles with only hydrocarbon or substituted hydrocarbon radicals attached in position 2
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- C07D417/04—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing two hetero rings directly linked by a ring-member-to-ring-member bond
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Abstract
本发明提供一种新的与Aβ斑块具有高亲和力的N2S2类2‑芳基苯并噻唑化合物及其制备方法与应用。所述化合物的结构如式(I)所示:其中,M为Re或99mTc,X为CH或N,R为H或CH3,Y为‑(CH2)nO‑(n为3‑6之间的整数)或‑(CH2CH2O)n‑(n为2或3)。体内外实验均表明,该类分子大多与Aβ1‑42聚集体具有较高的亲和力,可特异性地与转基因小鼠和AD病人脑切片上的Aβ斑块结合,部分99mTc标记的显像剂在正常小鼠体内具有较高的初始脑摄取和较快的脑清除速率,有潜力开发为一种新的用于AD早期临床诊断的Aβ斑块SPECT显像剂。
Description
技术领域
本发明涉及放射性药物化学和临床核医学技术领域,具体地说,涉及一种与Aβ斑块具有高亲和力的N2S2类2-芳基苯并噻唑化合物及其制备方法与应用。
背景技术
阿尔兹海默症(Alzheimer’s Disease,简称AD),是一种进行性发展的致死性神经退行性疾病,是痴呆最常见的病因,主要表现出渐进性记忆障碍、认知功能障碍、人格改变及语言障碍等神经精神症状,严重影响人的社交、职业与生活能力。全球共有超过2000万AD病例,其患病率随年龄增高而增高。随着人口的老龄化,AD的发病率逐年上升,严重危害老年人的身心健康和生活质量,给病人造成深重的痛苦,同时也给家庭和社会带来沉重的负担,已成为严重的社会问题,引起各国政府和医学界的普遍关注。
然而临床上至今没有能对AD进行确诊的方法,唯有在显微镜下对死者脑组织进行检查,根据神经纤维缠结(Neurofibrillary Tangles,NFTs)和老年斑(Senile Plaques,SPs)这两项最主要的病理特征的有无,才能最终确诊。因此,AD的诊断目前仍然是一项世界难题,该领域内还有很多空白有待填补。
根据β淀粉样蛋白(Amyloid-βPeptide,Aβ)级联假说,可以针对脑内Aβ斑块设计小分子探针,通过影像学的方法,实现AD的诊断。结合核医学技术所具有的高灵敏度、简便安全、无创伤等优点,有希望得到性能优良的Aβ斑块分子探针,从而早期无创伤地诊断AD。
在过去的十年里,已经有很多Aβ分子探针进入了临床试验阶段,尤其是用于PET(正电子发射计算机断层显像)的分子探针已经取得了长足的发展,[18F]GE-067,[18F]BAY94-9172和[18F]AV-45已经获得美国FDA批准。然而,SPECT(单光子发射计算机断层显像)显像剂由于进脑量或其他体内性质的限制始终没有发现有效的Aβ分子探针。因此以Aβ斑块为靶点,开发与之具有高亲和力和高选择性的SPECT显像剂用于AD的临床影像学准确诊断具有非常重要的科学意义和实际应用价值。
发明内容
本发明的目的是提供一种与Aβ斑块具有高亲和力的N2S2类2-芳基苯并噻唑化合物及其制备方法与应用。
为了实现本发明目的,本发明提供的与Aβ斑块具有高亲和力的N2S2类2-芳基苯并噻唑化合物,其结构如式(I)所示:
其中,M为Re或99mTc,X为CH或N,R为H或CH3,Y为-(CH2)nO-(n为3-6之间的整数)或-(CH2CH2O)n-(n为2或3)。
优选地,所述化合物为:
当M为Re,Y为-(CH2)nO-时,式(I)所示的N2S2类2-芳基苯并噻唑化合物可按照如下步骤进行制备:
S11、称取1.0mmol化合物(Ⅱ),2.0mmol 1,n-二溴烷烃和1.0mmol碳酸钾于100mL圆底烧瓶中,加入约30mL乙腈,90℃加热回流2h,趁热抽滤,所得滤液减压除去溶剂,加入少量石油醚,有固体析出,抽滤,用石油醚充分冲洗所得固体,烘干,得化合物(Ⅲ);
S12、称取0.30mmol化合物Ⅲ、0.25mmol BAT-Boc、0.50mmol碳酸钾和0.25mmol碘化钾于100mL圆底烧瓶中,加入约40mL乙腈,90℃加热回流过夜;TLC监测反应结束后,趁热抽滤,所得滤液减压除去溶剂,硅胶柱层析分离纯化得标记前体(Ⅳ);
S13、称取0.10mmol标记前体(Ⅳ)于50mL圆底烧瓶中,置于冰水浴,先加入2mL三氟乙酸,搅拌5min,再加入40μL三乙基硅烷,搅拌10min,减压除去三氟乙酸,加入0.10mmol(PPh3)2ReOCl3、20mL CH2Cl2:MeOH=9:1(v:v)的混合溶剂和适量无水乙酸钠,90℃加热回流2h;TLC监测反应结束后,减压除去溶剂,硅胶柱层析分离纯化即得铼配合物。
当M为99mTc,Y为-(CH2)nO-时,式(I)所示的N2S2类2-芳基苯并噻唑化合物可按照如下步骤进行制备:
S21、称取1.0mmol化合物(Ⅱ),2.0mmol 1,n-二溴烷烃和1.0mmol碳酸钾于100mL圆底烧瓶中,加入约30mL乙腈,90℃加热回流2h,趁热抽滤,所得滤液减压除去溶剂,加入少量石油醚,有固体析出,抽滤,用石油醚充分冲洗所得固体,烘干,得化合物(Ⅲ);
S22、称取0.30mmol化合物Ⅲ、0.25mmol BAT-Boc、0.50mmol碳酸钾和0.25mmol碘化钾于100mL圆底烧瓶中,加入约40mL乙腈,90℃加热回流过夜;TLC监测反应结束后,趁热抽滤,所得滤液减压除去溶剂,硅胶柱层析分离纯化得标记前体(Ⅳ);
S23、取0.05mg标记前体(Ⅳ)溶于100μL三氟乙酸中,室温静置5min,加入2μL三乙基硅烷,室温静置10min,氮气吹干,加入50μL无水乙醇溶解,加入新鲜制备的99mTc-GH,90℃加热10min后即得99mTc标记配合物。
当M为Re,Y为-(CH2CH2O)n-时,式(I)所示的N2S2类2-芳基苯并噻唑化合物可按照如下步骤进行制备:
S31、称取1.00mmol化合物(Ⅱ),1.20mmol HO(CH2CH2O)nCl和2.00mmol碳酸钾于100mL圆底烧瓶中,加入约5mL DMF,110℃加热4h,加入去离子水,二氯甲烷萃取,有机相合并后经无水硫酸钠干燥,滤除干燥剂,旋蒸除去溶剂,加入少量石油醚,有固体析出,抽滤,用石油醚充分冲洗所得固体,烘干,得化合物(Ⅴ);
S32、称取0.80mmol化合物(Ⅴ)用二氯甲烷溶解,冰水浴中搅拌,加入三苯基膦1.60mmol,缓慢加入1.60mmol N-溴代丁二酰亚胺(NBS),冰水浴中反应1h,加入5mL饱和NaHSO4溶液搅拌30min,加入去离子水,加饱和NaHCO3中和,二氯甲烷萃取,合并有机相,无水硫酸镁干燥,旋蒸除去溶剂,硅胶柱分离得化合物(Ⅵ);
S33、称取0.30mmol化合物(Ⅵ)、0.25mmol BAT-Boc、0.50mmol碳酸钾和0.25mmol碘化钾于100mL圆底烧瓶中,加入约40mL乙腈,90℃加热回流过夜;TLC监测反应结束后,趁热抽滤,所得滤液减压除去溶剂,硅胶柱层析分离纯化得标记前体(Ⅶ);
S34、称取0.10mmol标记前体(Ⅶ)于50mL圆底烧瓶中,置于冰水浴,先加入2mL三氟乙酸,搅拌5min,再加入40μL三乙基硅烷,搅拌10min,减压除去三氟乙酸,加入0.10mmol(PPh3)2ReOCl3、20mL CH2Cl2:MeOH=9:1(v:v)的混合溶剂和适量无水乙酸钠,90℃加热回流2h;TLC监测反应结束后,减压除去溶剂,硅胶柱层析分离纯化即得铼配合物。
当M为99mTc,Y为-(CH2CH2O)n-时,式(I)所示的N2S2类2-芳基苯并噻唑化合物可按照如下步骤进行制备:
S41、称取1.00mmol化合物(Ⅱ),1.20mmol HO(CH2CH2O)nCl和2.00mmol碳酸钾于100mL圆底烧瓶中,加入约5mL DMF,110℃加热4h,加入去离子水,二氯甲烷萃取,有机相合并后经无水硫酸钠干燥,滤除干燥剂,旋蒸除去溶剂,加入少量石油醚,有固体析出,抽滤,用石油醚充分冲洗所得固体,烘干,得化合物(Ⅴ);
S42、称取0.80mmol化合物(Ⅴ)用二氯甲烷溶解,冰水浴中搅拌,加入三苯基膦1.60mmol,缓慢加入1.60mmol N-溴代丁二酰亚胺(NBS),冰水浴中反应1h,加入5mL饱和NaHSO4溶液搅拌30min,加入去离子水,加饱和NaHCO3中和,二氯甲烷萃取,合并有机相,无水硫酸镁干燥,旋蒸除去溶剂,硅胶柱分离得化合物(Ⅵ);
S43、称取0.30mmol化合物(Ⅵ)、0.25mmol BAT-Boc、0.50mmol碳酸钾和0.25mmol碘化钾于100mL圆底烧瓶中,加入约40mL乙腈,90℃加热回流过夜;TLC监测反应结束后,趁热抽滤,所得滤液减压除去溶剂,硅胶柱层析分离纯化得标记前体(Ⅶ);
S44、取0.05mg标记前体(Ⅶ)溶于100μL三氟乙酸中,室温静置5min,加入2μL三乙基硅烷,室温静置10min,氮气吹干,加入50μL无水乙醇溶解,加入新鲜制备的99mTc-GH,90℃加热10min后即得99mTc标记配合物。
上述制备方法中涉及的各化合物的结构式如下:
采用上述制备方法可制备获得所述与Aβ斑块具有高亲和力的N2S2类2-芳基苯并噻唑化合物,在此基础上,对于各反应物用量、反应条件等参数所做出的适当调整,只要能够获得本发明的化合物,均落入本发明保护范围。
本发明还提供所述与Aβ斑块具有高亲和力的N2S2类2-芳基苯并噻唑化合物在制备核医学单光子显像剂中的应用。
本发明还提供由所述与Aβ斑块具有高亲和力的N2S2类2-芳基苯并噻唑化合物制备的核医学单光子显像剂。
本发明还提供所述与Aβ斑块具有高亲和力的N2S2类2-芳基苯并噻唑化合物在制备与β-淀粉样蛋白沉积相关中枢疾病的诊断试剂中的应用。
本发明还提供由所述与Aβ斑块具有高亲和力的N2S2类2-芳基苯并噻唑化合物制备的与β-淀粉样蛋白沉积相关中枢疾病的诊断试剂。
本发明进一步提供含有上述诊断试剂的用于检测与β-淀粉样蛋白沉积相关中枢疾病的试剂盒。
本发明提供一类新的与Aβ斑块具有高亲和力的N2S2类2-芳基苯并噻唑化合物,体内外实验均表明,该类分子大多与Aβ1-42聚集体具有较高的亲和力,可特异性地与转基因小鼠和AD病人脑切片上的Aβ斑块结合,部分99mTc标记的显像剂在正常小鼠体内具有较高的初始脑摄取和较快的脑清除速率,有潜力开发为一种新的用于AD早期临床诊断的Aβ斑块SPECT显像剂。
附图说明
图1为本发明实施例40-42,44,46,49和50中的化合物在AD转基因小鼠脑切片的荧光染色结果(A-G)及相邻切片用硫磺素-S染色对照结果(H-N)。
图2为本发明实施例55和56中的化合物在AD转基因小鼠脑切片的荧光染色结果(A和C)及相邻切片用硫磺素-S染色对照结果(B和D)。
图3为本发明实施例40-42,44,46,49和50中的化合物在AD人脑切片的荧光染色结果(A-G)。
图4为本发明实施例55(A)和实施例56(B)中的化合物在AD人脑切片的荧光染色结果。
图5为本发明实施例57-63中化合物[99mTc]40,[99mTc]41,[99mTc]42,[99mTc]44,[99mTc]46,[99mTc]49和[99mTc]50在AD转基因小鼠脑切片上的放射性自显影结果(A-G)及相同切片的硫磺素-S荧光染色对照结果(H-N)。
图6为本发明实施例中N2S2类2-芳基苯并噻唑化合物的合成路线。
图7为本发明实施例中N2S2类2-芳基苯并噻唑化合物的99mTc标记路线。
具体实施方式
以下实施例用于说明本发明,但不用来限制本发明的范围。若未特别指明,实施例中所用的技术手段为本领域技术人员所熟知的常规手段,所用原料均为市售商品。
实施例1合成中间体1
称取270.1mg 2-(4-(二甲氨基)苯基)-6-羟基苯并噻唑(1.0mmol),403.8mg 1,3-二溴丙烷(2.0mmol)和414.6mg碳酸钾(3.0mmol)于100mL圆底烧瓶中,加入约30mL乙腈,90℃加热回流2h,趁热抽滤,所得滤液减压除去溶剂,加入少量石油醚,有固体析出,抽滤,用石油醚充分冲洗所得固体,烘干得产物,结构如下,产率:79%,熔点128.5-129.9℃。1H NMR(400MHz,CDCl3)δ7.87(d,J=8.6Hz,2H),7.86(d,J=8.9Hz,1H),7.32(d,J=2.5Hz,1H),7.03(dd,J=8.8,2.5Hz,1H),6.63(d,J=8.7Hz,2H),4.16(t,J=5.8Hz,2H),3.63(t,J=6.4Hz,2H),2.89(s,6H),2.35(p,J=6.1Hz,2H)。
实施例2合成中间体2
由2-(4-(二甲氨基)苯基)-6-羟基苯并噻唑和1,4-二溴丁烷反应制得中间体2,其反应的原料比例、溶剂、反应条件等均与实施例1相同,结构如下,产率:65%,熔点139.5-141.4℃。1H NMR(400MHz,CDCl3)δ7.92(d,J=8.5Hz,2H),7.87(d,J=8.8Hz,1H),7.30(d,J=2.4Hz,1H),7.02(dd,J=8.9,2.5Hz,1H),6.75(d,J=8.9Hz,2H),4.06(t,J=6.0Hz,2H),3.51(t,J=6.6Hz,2H),3.06(s,6H),2.11(p,J=6.5Hz,2H),1.99(p,J=6.0Hz,2H)。
实施例3合成中间体3
由2-(4-(二甲氨基)苯基)-6-羟基苯并噻唑和1,5-二溴戊烷反应制得中间体3,其反应的原料比例、溶剂、反应条件等均与实施例1相同,结构如下,产率:45%,熔点185.1-186.3℃。1H NMR(400MHz,CDCl3)δ7.92(d,J=8.8Hz,2H),7.87(d,J=8.9Hz,1H),7.30(d,J=2.4Hz,1H),7.03(dd,J=8.9,2.4Hz,1H),6.75(d,J=8.8Hz,2H),4.03(t,J=6.3Hz,2H),3.45(t,J=6.8Hz,2H),3.05(s,6H),2.01–1.91(m,2H),1.90–1.81(m,2H),1.71–1.63(m,2H)。
实施例4合成中间体4
由2-(4-(二甲氨基)苯基)-6-羟基苯并噻唑和1,6-二溴己烷反应制得中间体4,其反应的原料比例、溶剂、反应条件等均与实施例1相同,结构如下,产率:56%,熔点142.8-144.0℃。1H NMR(400MHz,CDCl3)δ8.04–7.85(m,3H),7.30(d,J=2.4Hz,1H),7.04(dd,J=8.9,2.2Hz,1H),6.76(d,J=8.6Hz,2H),4.03(t,J=6.4Hz,2H),3.44(t,J=6.8Hz,2H),3.06(s,6H),1.96–1.88(m,2H),1.88–1.79(m,2H),1.57–1.50(m,4H)。
实施例5合成中间体5
由2-(4-(甲氨基)苯基)-6-羟基苯并噻唑和1,3-二溴丙烷反应制得中间体5,其反应的原料比例、溶剂、反应条件等均与实施例1相同,结构如下,产率:77%,熔点86.8-88.0℃。1H NMR(400MHz,CDCl3)δ7.87(d,J=8.6Hz,2H),δ7.86(d,J=8.8Hz,1H),δ7.33(d,J=2.4Hz,1H),7.04(dd,J=8.9,2.5Hz,1H),6.65(d,J=8.7Hz,2H),4.17(t,J=5.8Hz,2H),3.64(t,J=6.4Hz,2H),2.91(s,3H),2.36(p,J=6.1Hz,2H)。
实施例6合成中间体6
由2-(4-(甲氨基)苯基)-6-羟基苯并噻唑和1,4-二溴丁烷反应制得中间体6,其反应的原料比例、溶剂、反应条件等均与实施例1相同,结构如下,产率:61%,熔点148.5-149.2℃。1H NMR(400MHz,CDCl3)δ7.86(d,J=8.6Hz,2H),δ7.85(d,J=8.7Hz,1H),δ7.29(d,J=2.3Hz,1H),7.02(dd,J=8.9,2.4Hz,1H),6.64(d,J=8.6Hz,2H),4.05(t,J=6.0Hz,2H),3.51(t,J=6.5Hz,2H),2.90(s,3H),2.12–2.05(m,2H),2.02–1.93(m,2H)。
实施例7合成中间体7
由2-(4-(甲氨基)苯基)-6-羟基苯并噻唑和1,5-二溴戊烷反应制得中间体7,其反应的原料比例、溶剂、反应条件等均与实施例1相同,结构如下,产率:78%,熔点114.9-115.6℃。1H NMR(400MHz,CDCl3)δ7.89(d,J=8.6Hz,3H),7.30(d,J=2.4Hz,1H),7.03(dd,J=8.9,2.6Hz,1H),6.65(d,J=8.7Hz,2H),4.03(t,J=6.3Hz,2H),3.46(t,J=6.7Hz,2H),2.91(s,3H),2.00–1.92(m,2H),1.90–1.81(m,2H),1.70–1.63(m,2H)。
实施例8合成中间体8
由2-(4-(甲氨基)苯基)-6-羟基苯并噻唑和1,6-二溴己烷反应制得中间体8,其反应的原料比例、溶剂、反应条件等均与实施例1相同,结构如下,产率:65%,熔点125.3-126.5℃。1H NMR(400MHz,CDCl3)δ7.87(d,J=8.5Hz,2H),δ7.86(d,J=8.4Hz,1H),δ7.30(d,J=2.3Hz,1H),7.03(dd,J=8.9,2.5Hz,1H),6.64(d,J=8.6Hz,2H),4.02(t,J=6.4Hz,2H),3.44(t,J=6.8Hz,2H),2.91(s,3H),1.96–1.78(m,4H),1.55–1.51(m,4H)。
实施例9合成中间体9
由2-(2-(二甲氨基)吡啶基)-6-羟基苯并噻唑和1,3-二溴丙烷反应制得中间体9,其反应的原料比例、溶剂、反应条件等均与实施例1相同,结构如下,产率:89%,熔点128.8-131.8℃。1H NMR(400MHz,CDCl3)δ8.76(s,1H),8.15–8.11(m,1H),7.87(d,J=8.7Hz,1H),7.34(s,1H),7.06(t,J=6.6Hz,1H),6.58(d,J=9.0Hz,1H),4.18(t,J=5.7Hz,2H),3.64(t,J=6.4Hz,2H),3.18(s,6H),2.40–2.32(m,2H)。
实施例10合成中间体10
由2-(2-(二甲氨基)吡啶基)-6-羟基苯并噻唑和1,4-二溴丁烷反应制得中间体10,其反应的原料比例、溶剂、反应条件等均与实施例1相同,结构如下,产率:68%,熔点124.2-125.0℃。1H NMR(400MHz,CDCl3)δ8.76(d,J=2.0Hz,1H),8.11(dd,J=9.0,2.4Hz,1H),7.86(d,J=8.9Hz,1H),7.30(d,J=2.3Hz,1H),7.03(dd,J=8.9,2.4Hz,1H),6.57(d,J=9.0Hz,1H),4.05(t,J=6.0Hz,2H),3.51(t,J=6.5Hz,2H),3.17(s,6H),2.14–2.04(m,2H),2.02–1.93(m,2H)。
实施例11合成中间体11
由2-(2-(二甲氨基)吡啶基)-6-羟基苯并噻唑和1,5-二溴戊烷反应制得中间体11,其反应的原料比例、溶剂、反应条件等均与实施例1相同,结构如下,产率:85%,熔点144.5-145.5℃。1H NMR(400MHz,CDCl3)δ8.76(s,1H),8.14(d,J=8.9Hz,1H),7.86(d,J=8.9Hz,1H),7.31(d,J=1.9Hz,1H),7.04(dd,J=8.9,2.3Hz,1H),6.60(d,J=9.0Hz,1H),4.04(t,J=6.3Hz,2H),3.46(t,J=6.7Hz,2H),3.19(s,6H),2.02–1.81(m,4H),1.74–1.60(m,2H)。
实施例12合成中间体12
由2-(2-(二甲氨基)吡啶基)-6-羟基苯并噻唑和1,6-二溴己烷反应制得中间体12,其反应的原料比例、溶剂、反应条件等均与实施例1相同,结构如下,产率:55%,熔点150.7-152.2℃。1H NMR(400MHz,CDCl3)δ8.76(d,J=2.4Hz,1H),8.16(dd,J=9.0,2.2Hz,1H),7.86(d,J=8.9Hz,1H),7.31(d,J=2.4Hz,1H),7.04(dd,J=8.9,2.5Hz,1H),6.60(d,J=9.0Hz,1H),4.03(t,J=6.4Hz,2H),3.44(t,J=6.8Hz,2H),3.20(s,6H),1.99–1.77(m,4H),1.61–1.46(m,4H)。
实施例13合成中间体13
由2-(2-(甲氨基)吡啶基)-6-羟基苯并噻唑和1,3-二溴丙烷反应制得中间体13,其反应的原料比例、溶剂、反应条件等均与实施例1相同,结构如下,产率:83%,熔点122.2-123.5℃。1H NMR(400MHz,CDCl3)δ8.72(d,J=2.0Hz,1H),8.12(dd,J=8.8,2.3Hz,1H),7.88(d,J=8.9Hz,1H),7.34(d,J=2.4Hz,1H),7.06(dd,J=8.9,2.5Hz,1H),6.48(d,J=8.7Hz,1H),5.01(d,J=4.6Hz,1H),4.18(t,J=5.8Hz,2H),3.64(t,J=6.4Hz,2H),3.01(d,J=5.2Hz,3H),2.36(p,J=6.1Hz,2H)。
实施例14合成中间体14
由2-(2-(甲氨基)吡啶基)-6-羟基苯并噻唑和1,4-二溴丁烷反应制得中间体14,其反应的原料比例、溶剂、反应条件等均与实施例1相同,结构如下,产率:55%,熔点152.9-154.6℃。1H NMR(400MHz,CDCl3)δ8.72(d,J=1.9Hz,1H),8.11(dd,J=8.7,2.2Hz,1H),7.86(d,J=8.9Hz,1H),7.31(d,J=2.4Hz,1H),7.04(dd,J=8.9,2.4Hz,1H),6.47(d,J=8.8Hz,1H),4.99(d,J=4.4Hz,1H),4.06(t,J=6.0Hz,2H),3.51(t,J=6.5Hz,2H),3.00(d,J=5.1Hz,3H),2.17–2.05(m,2H),2.04–1.94(m,2H)。
实施例15合成中间体15
由2-(2-(甲氨基)吡啶基)-6-羟基苯并噻唑和1,5-二溴戊烷反应制得中间体15,其反应的原料比例、溶剂、反应条件等均与实施例1相同,结构如下,产率:73%,熔点124.7-125.6℃。1H NMR(400MHz,CDCl3)δ8.72(d,J=1.9Hz,1H),8.11(dd,J=8.7,2.4Hz,1H),7.87(d,J=8.9Hz,1H),7.31(d,J=2.4Hz,1H),7.04(dd,J=8.9,2.5Hz,1H),6.46(d,J=8.8Hz,1H),4.94(d,J=4.9Hz,1H),4.04(t,J=6.3Hz,2H),3.46(t,J=6.7Hz,2H),3.00(d,J=5.2Hz,3H),2.01–1.92(m,2H),1.90–1.82(m,2H),1.69–1.63(m,2H)。
实施例16合成中间体16
由2-(2-(甲氨基)吡啶基)-6-羟基苯并噻唑和1,6-二溴己烷反应制得中间体16,其反应的原料比例、溶剂、反应条件等均与实施例1相同,结构如下,产率:63%,熔点116.4-117.6℃。1H NMR(400MHz,CDCl3)δ8.72(d,J=2.4Hz,1H),8.11(dd,J=8.7,2.4Hz,1H),7.86(d,J=8.9Hz,1H),7.31(d,J=2.5Hz,1H),7.04(dd,J=8.9,2.5Hz,1H),6.46(d,J=8.8Hz,1H),4.94(d,J=4.9Hz,1H),4.02(t,J=6.4Hz,2H),3.44(t,J=6.8Hz,2H),3.00(d,J=5.2Hz,3H),1.97–1.78(m,4H),1.57–1.50(m,4H)。
实施例17合成中间体17
称取270.1mg 2-(4-(二甲氨基)苯基)-6-羟基苯并噻唑(化合物Ⅱ,1.00mmol),148.8mg 2-(2-氯乙氧基)乙醇(1.20mmol)和276.4mg碳酸钾(2.00mmol)于100mL圆底烧瓶中,加入约5mL DMF,110℃加热4h,加入去离子水,二氯甲烷萃取,有机相合并后经无水硫酸钠干燥,滤除干燥剂,旋蒸除去溶剂,加入少量石油醚,有固体析出,抽滤,用石油醚充分冲洗所得固体,烘干,得产物,结构如下,产率:85%。1H NMR(400MHz,CDCl3)δ7.90(d,J=8.9Hz,2H),7.86(d,J=8.9Hz,1H),7.33(d,J=2.5Hz,1H),7.05(dd,J=8.9,2.5Hz,1H),6.74(d,J=8.9Hz,2H),4.20(t,J=4.5Hz,2H),3.90(t,J=4.8Hz,2H),3.78(t,J=4.6Hz,2H),3.70(t,J=4.8Hz,2H),3.04(s,6H).
实施例18合成中间体18
由2-(2-(二甲氨基)吡啶基)-6-羟基苯并噻唑和2-(2-氯乙氧基)乙醇反应制得中间体18,其反应的原料比例、溶剂、反应条件等均与实施例17相同,结构如下,产率:73%.1HNMR(400MHz,CDCl3)δ8.76(d,J=2.0Hz,1H),8.12(dd,J=9.0,2.5Hz,1H),7.87(d,J=8.9Hz,1H),7.34(d,J=2.5Hz,1H),7.07(dd,J=8.9,2.5Hz,1H),6.58(d,J=9.0Hz,1H),4.21(t,J=4.7Hz,2H),3.91(t,J=4.7Hz,2H),3.79(s,2H),3.70(t,J=4.4Hz,2H),3.18(s,6H).
实施例19合成中间体19
称取286.5mg中间体17(0.80mmol)用二氯甲烷溶解,冰水浴中搅拌,加入三苯基膦419.2mg(1.60mmol),缓慢加入284.6mg N-溴代丁二酰亚胺(NBS,1.60mmol),冰水浴中反应1h,加入5mL饱和NaHSO4溶液搅拌30min,加入去离子水,加饱和NaHCO3中和,二氯甲烷萃取,合并有机相,无水硫酸镁干燥,旋蒸除去溶剂,硅胶柱分离得产物,结构如下,产率:62%。1HNMR(400MHz,CDCl3)δ7.91(d,J=8.9Hz,2H),7.87(d,J=8.9Hz,1H),7.35(d,J=2.5Hz,1H),7.06(dd,J=8.9,2.5Hz,1H),6.75(d,J=9.0Hz,2H),4.21(t,J=4.7Hz,2H),3.95–3.88(m,4H),3.51(t,J=6.3Hz,2H),3.05(s,6H).
实施例20合成中间体20
由中间体18和NBS反应制得中间体20,其反应的原料比例、溶剂、反应条件等均与实施例19相同,结构如下,产率:92%。1H NMR(400MHz,CDCl3)δ8.76(d,J=2.0Hz,1H),8.12(dd,J=9.0,2.5Hz,1H),7.86(d,J=8.9Hz,1H),7.35(d,J=2.5Hz,1H),7.07(dd,J=8.9,2.5Hz,1H),6.58(d,J=9.0Hz,1H),4.21(t,J=4.7Hz,2H),3.93–3.89(m,4H),3.51(t,J=6.3Hz,2H),3.18(s,6H).
实施例21合成标记前体21
称取117.0mg中间体1(0.3mmol)、191.1mg BAT-Boc(0.25mmol)、79.1mg(0.50mmol)碳酸钾和41.5mg碘化钾(0.25mmol)于100mL圆底烧瓶中,加入约40mL乙腈,90℃加热回流过夜。TLC监测反应结束后,趁热抽滤,所得滤液减压除去溶剂,硅胶柱层析分离纯化得产物,结构如下,产率:28%,熔点49.7-51.1℃。1H NMR(400MHz,CDCl3)δ7.90(d,J=8.9Hz,2H),7.81(d,J=8.9Hz,1H),7.43–7.34(m,13H),7.28–7.14(m,18H),6.95(d,J=8.7Hz,1H),6.75(d,J=8.9Hz,2H),3.93(t,J=6.1Hz,2H),3.05(s,6H),3.00–2.77(m,4H),2.44–2.20(m,10H),1.78–1.66(m,2H),1.36(s,9H).MS(ESI):m/z calcd for C67H71N4O3S3[M+H]+:1075.5.Found:1075.2。
实施例22合成标记前体22
由中间体2和BAT-Boc反应制得标记前体22,其反应的原料比例、溶剂、反应条件等均与实施例21相同,结构如下,产率:29%,熔点58.6-60.0℃。1H NMR(400MHz,CDCl3)δ7.90(d,J=8.8Hz,2H),7.84(d,J=8.9Hz,1H),7.40(d,J=7.6Hz,13H),7.31–7.22(m,12H),7.21–7.13(m,6H),6.99(dd,J=8.8,2.1Hz,1H),6.73(d,J=8.9Hz,2H),3.93(t,J=6.2Hz,2H),3.03(s,6H),3.00–2.79(m,4H),2.41–2.16(m,10H),1.76–1.63(m,2H),1.48–1.30(m,11H).MS(ESI):m/z calcd for C68H73N4O3S3[M+H]+:1089.5.Found:1089.2。
实施例23合成标记前体23
由中间体3和BAT-Boc反应制得标记前体23,其反应的原料比例、溶剂、反应条件等均与实施例21相同,结构如下,产率:43%,熔点49.9-51.3℃。1H NMR(400MHz,CDCl3)δ7.90(d,J=8.9Hz,2H),7.84(d,J=8.9Hz,1H),7.45–7.34(m,12H),7.32–7.22(m,13H),7.22–7.14(m,6H),7.00(d,J=6.9Hz,1H),6.74(d,J=8.9Hz,2H),3.96(t,J=6.2Hz,2H),3.05(s,6H),3.01–2.82(m,4H),2.42–2.14(m,8H),1.80–1.70(m,2H),1.61–1.51(m,2H),1.44–1.28(m,13H).MS(ESI):m/z calcd for C69H75N4O3S3[M+H]+:1103.5.Found:1103.1。
实施例24合成标记前体24
由中间体4和BAT-Boc反应制得标记前体24,其反应的原料比例、溶剂、反应条件等均与实施例21相同,结构如下,产率:37%,熔点52.3-53.4℃。1H NMR(400MHz,CDCl3)δ7.90(d,J=8.9Hz,2H),7.84(d,J=8.9Hz,1H),7.45–7.35(m,12H),7.32–7.22(m,13H),7.22–7.13(m,6H),7.01(dd,J=8.9,2.4Hz,1H),6.74(d,J=9.0Hz,2H),3.98(t,J=6.4Hz,2H),3.05(s,6H),3.00–2.78(m,4H),2.40–2.14(m,8H),1.84–1.72(m,2H),1.57(s,4H),1.47–1.31(m,13H).MS(ESI):m/z calcd for C70H77N4O3S3[M+H]+:1117.5.Found:1117.1。
实施例25合成标记前体25
由中间体5和BAT-Boc反应制得标记前体25,其反应的原料比例、溶剂、反应条件等均与实施例21相同,结构如下,产率:24%,熔点57.2-58.5℃。1H NMR(400MHz,CDCl3)δ7.87(d,J=8.6Hz,2H),7.81(d,J=8.9Hz,1H),7.42–7.35(m,12H),7.30–7.13(m,19H),6.95(d,J=7.1Hz,1H),6.65(d,J=8.7Hz,2H),3.93(t,J=6.1Hz,2H),3.06–2.80(m,7H),2.44–2.19(m,10H),1.76–1.69(m,2H),1.42–1.33(m,9H).MS(ESI):m/zcalcd for C66H69N4O3S3[M+H]+:1061.5.Found:1060.9。
实施例26合成标记前体26
由中间体6和BAT-Boc反应制得标记前体26,其反应的原料比例、溶剂、反应条件等均与实施例21相同,结构如下,产率:28%,熔点55.1-56.5℃。1H NMR(400MHz,CDCl3)δ7.94–7.81(m,3H),7.50–7.35(m,12H),7.35–7.16(m,19H),7.01(dd,J=8.9,2.3Hz,1H),6.64(d,J=8.7Hz,2H),3.95(t,J=6.1Hz,2H),3.12–2.78(m,7H),2.49–2.16(m,10H),1.77–1.65(m,2H),1.50–1.33(m,11H).MS(ESI):m/z calcd forC67H71N4O3S3[M+H]+:1075.5.Found:1075.1。
实施例27合成标记前体27
由中间体7和BAT-Boc反应制得标记前体27,其反应的原料比例、溶剂、反应条件等均与实施例21相同,结构如下,产率:59%,熔点53.7-54.9℃。1H NMR(400MHz,CDCl3)δ7.87(d,J=8.7Hz,2H),7.84(d,J=8.9Hz,1H),7.44–7.36(m,12H),7.32–7.22(m,13H),7.22–7.13(m,6H),7.01(dd,J=8.9,2.5Hz,1H),6.64(d,J=8.7Hz,2H),3.96(t,J=6.4Hz,2H),3.09–2.79(m,7H),2.43–2.13(m,10H),1.80–1.70(m,2H),1.44–1.28(m,13H).MS(ESI):m/zcalcd for C68H73N4O3S3[M+H]+:1089.5.Found:1089.1。
实施例28合成标记前体28
由中间体8和BAT-Boc反应制得标记前体28,其反应的原料比例、溶剂、反应条件等均与实施例21相同,结构如下,产率:51%,熔点53.4-54.6℃。1H NMR(400MHz,CDCl3)δ7.90–7.82(m,3H),7.44–7.36(m,12H),7.32–7.22(m,13H),7.22–7.14(m,6H),7.01(dd,J=8.9,2.5Hz,1H),6.64(d,J=8.7Hz,2H),3.98(t,J=6.4Hz,2H),3.09–2.78(m,7H),2.41–2.11(m,10H),1.83–1.73(m,2H),1.47–1.32(m,11H),1.30–1.20(m,4H).MS(ESI):m/z calcdfor C69H75N4O3S3[M+H]+:1103.5.Found:1103.2。
实施例29合成标记前体29
由中间体9和BAT-Boc反应制得标记前体29,其反应的原料比例、溶剂、反应条件等均与实施例21相同,结构如下,产率:18%,熔点49.1-50.3℃。1H NMR(400MHz,CDCl3)δ8.76(d,J=2.3Hz,1H),8.12(dd,J=9.0,2.4Hz,1H),7.82(d,J=8.9Hz,1H),7.43–7.35(m,12H),7.29–7.12(m,19H),6.97(dd,J=8.8,2.0Hz,1H),6.57(d,J=9.0Hz,1H),3.94(t,J=6.1Hz,2H),3.16(s,6H),3.06–2.81(m,4H),2.42–2.20(m,10H),1.76–1.69(m,2H),1.37(s,9H).MS(ESI):m/z calcd for C66H70N5O3S3[M+H]+:1075.5.Found:1075.8。
实施例30合成标记前体30
由中间体10和BAT-Boc反应制得标记前体30,其反应的原料比例、溶剂、反应条件等均与实施例21相同,结构如下,产率:32%,熔点52.8-53.9℃。1H NMR(400MHz,CDCl3)δ8.76(d,J=2.2Hz,1H),8.12(dd,J=9.0,2.3Hz,1H),7.84(d,J=8.9Hz,1H),7.45–7.34(m,12H),7.32–7.22(m,13H),7.21–7.13(m,6H),7.01(dd,J=8.9,2.3Hz,1H),6.56(d,J=9.0Hz,1H),3.94(t,J=6.3Hz,2H),3.15(s,6H),3.07–2.81(m,4H),2.42–2.18(m,10H),1.76–1.65(m,2H),1.50–1.31(m,11H).MS(ESI):m/z calcd for C67H72N5O3S3[M+H]+:1090.5.Found:1090.1。
实施例31合成标记前体31
由中间体11和BAT-Boc反应制得标记前体31,其反应的原料比例、溶剂、反应条件等均与实施例21相同,结构如下,产率:26%,熔点37.2-38.3℃。1H NMR(400MHz,CDCl3)δ8.76(d,J=2.3Hz,1H),8.13(dd,J=9.0,2.4Hz,1H),7.85(d,J=8.9Hz,1H),7.44–7.36(m,12H),7.32–7.22(m,13H),7.22–7.14(m,6H),7.02(dd,J=8.9,2.4Hz,1H),6.58(d,J=9.0Hz,1H),3.97(t,J=6.5Hz,2H),3.18(s,6H),3.08–2.81(m,4H),2.40–2.16(m,10H),1.80–1.71(m,2H),1.47–1.28(m,13H).MS(ESI):m/z calcd for C68H74N5O3S3[M+H]+:1104.5.Found:1103.8。
实施例32合成标记前体32
由中间体12和BAT-Boc反应制得标记前体32,其反应的原料比例、溶剂、反应条件等均与实施例21相同,结构如下,产率:64%,熔点48.5-49.4℃。1H NMR(400MHz,CDCl3)δ8.76(d,J=2.3Hz,1H),8.13(dd,J=9.0,2.5Hz,1H),7.85(d,J=8.9Hz,1H),7.45–7.35(m,12H),7.31–7.23(m,13H),7.22–7.13(m,6H),7.03(dd,J=8.9,2.5Hz,1H),6.58(d,J=9.0Hz,1H),3.98(t,J=6.4Hz,2H),3.18(s,6H),3.08–2.78(m,4H),2.39–2.12(m,10H),1.83–1.74(m,2H),1.47–1.34(m,11H),1.29–1.22(m,4H).MS(ESI):m/z calcdforC69H76N5O3S3[M+H]+:1118.5.Found:1118.2。
实施例33合成标记前体33
由中间体13和BAT-Boc反应制得标记前体33,其反应的原料比例、溶剂、反应条件等均与实施例21相同,结构如下,产率:49%,熔点58.9-59.9℃。1H NMR(400MHz,CDCl3)δ8.71(s,1H),8.13(dd,J=8.8,2.2Hz,1H),7.83(d,J=8.9Hz,1H),7.44–7.35(m,12H),7.30–7.21(m,13H),7.21–7.14(m,6H),6.97(d,J=9.2Hz,1H),6.48(d,J=8.8Hz,1H),3.94(t,J=6.0Hz,2H),3.01(d,J=5.0Hz,3H),3.00–2.77(m,4H),2.45–2.20(m,8H),1.79–1.69(m,2H),1.67–1.56(m,2H),1.37(s,9H).MS(ESI):m/z calcd for C65H67N5O3S3[M+H]+:1062.4.Found:1062.4。
实施例34合成标记前体34
由中间体14和BAT-Boc反应制得标记前体34,其反应的原料比例、溶剂、反应条件等均与实施例21相同,结构如下,产率:46%,熔点51.7-53.1℃。1H NMR(400MHz,CDCl3)δ8.73(d,J=2.0Hz,1H),8.11(dd,J=8.8,2.2Hz,1H),7.87(d,J=8.9Hz,1H),7.47–7.36(m,12H),7.32–7.23(m,13H),7.23–7.14(m,6H),7.02(dd,J=8.9,2.4Hz,1H),6.47(d,J=8.8Hz,1H),3.95(t,J=6.3Hz,2H),3.09–2.81(m,7H),2.41–2.20(m,10H),1.76–1.66(m,2H),1.49–1.31(m,11H).MS(ESI):m/z calcd for C66H70N5O3S3[M+H]+:1076.5.Found:1076.1。
实施例35合成标记前体35
由中间体15和BAT-Boc反应制得标记前体35,其反应的原料比例、溶剂、反应条件等均与实施例21相同,结构如下,产率:44%,熔点52.6-54.0℃。1H NMR(400MHz,CDCl3)δ8.72(d,J=2.1Hz,1H),8.12(dd,J=8.8,2.4Hz,1H),7.86(d,J=8.9Hz,1H),7.44–7.34(m,12H),7.31–7.22(m,13H),7.22–7.14(m,6H),7.03(dd,J=8.9,2.5Hz,1H),6.47(d,J=8.8Hz,1H),3.97(t,J=6.4Hz,2H),3.09–2.79(m,7H),2.41–2.12(m,10H),1.81–1.70(m,2H),1.44–1.29(m,13H).MS(ESI):m/z calcd for C67H72N5O3S3[M+H]+:1090.5.Found:1090.2。
实施例36合成标记前体36
由中间体16和BAT-Boc反应制得标记前体36,其反应的原料比例、溶剂、反应条件等均与实施例21相同,结构如下,产率:51%,熔点40.6-41.5℃。1H NMR(400MHz,CDCl3)δ8.70(d,J=2.1Hz,1H),8.14(dd,J=8.8,2.4Hz,1H),7.86(d,J=8.9Hz,1H),7.46–7.36(m,12H),7.31–7.23(m,13H),7.22–7.15(m,6H),7.04(dd,J=8.9,2.5Hz,1H),6.49(d,J=8.8Hz,1H),3.98(t,J=6.4Hz,2H),3.16–2.79(m,7H),2.46–2.10(m,10H),1.83–1.73(m,2H),1.48–1.33(m,11H),1.30–1.21(m,4H).MS(ESI):m/z calcd for C68H74N5O3S3[M+H]+:1104.5.Found:1104.2。
实施例37合成标记前体37
由中间体19和BAT-Boc反应制得标记前体37,其反应的原料比例、溶剂、反应条件等均与实施例21相同,结构如下,产率:44%,熔点57.6-58.8℃。1H NMR(400MHz,CDCl3)δ7.90(d,J=8.9Hz,2H),7.83(d,J=8.9Hz,1H),7.43–7.34(m,12H),7.29(d,J=2.5Hz,1H),7.28–7.23(m,12H),7.21–7.15(m,6H),7.02(dd,J=8.9,2.5Hz,1H),6.74(d,J=9.0Hz,2H),4.11(t,J=4.9Hz,2H),3.74(t,J=4.8Hz,2H),3.42(t,J=6.1Hz,2H),3.05(s,6H),3.01–2.81(m,4H),2.53–2.45(m,2H),2.45–2.39(m,2H),2.37–2.20(m,6H),1.36(s,9H).MS(ESI):m/z calcd for C68H73N4O4S3[M+H]+:1105.5.Found:1105.4.
实施例38合成标记前体38
由中间体20和BAT-Boc反应制得标记前体38,其反应的原料比例、溶剂、反应条件等均与实施例21相同,结构如下,产率:55%,熔点45.3-46.7℃。1H NMR(400MHz,CDCl3)δ8.76(d,J=2.1Hz,1H),8.12(dd,J=9.0,2.5Hz,1H),7.84(d,J=8.9Hz,1H),7.43–7.36(m,12H),7.29(d,J=2.5Hz,1H),7.28–7.22(m,12H),7.21–7.15(m,6H),7.04(dd,J=8.9,2.5Hz,1H),6.58(d,J=8.8Hz,1H),4.11(t,J=4.9Hz,2H),3.75(t,J=4.8Hz,2H),3.42(t,J=5.9Hz,2H),3.18(s,6H),3.07–2.81(m,4H),2.52–2.45(m,2H),2.45–2.39(m,2H),2.37–2.21(m,6H),1.36(s,9H).MS(ESI):m/z calcd for C67H72N5O4S3[M+H]+:1106.5.Found:1106.3.
实施例39合成铼配合物39
称取98.7mg标记前体21(0.092mmol)于50mL圆底烧瓶中,置于冰水浴,先加入2mL三氟乙酸,搅拌5min,再加入40μL三乙基硅烷,搅拌10min,减压除去三氟乙酸,加入76.5mg(PPh3)2ReOCl3(0.092mmol)、20mL CH2Cl2:MeOH=9:1(v:v)的混合溶剂和适量无水乙酸钠,90℃加热回流2h。TLC监测反应结束后,减压除去溶剂,硅胶柱层析分离纯化即得,结构如下,产率:47%,熔点239.5-240.3℃。1H NMR(400MHz,DMSO)δ7.88–7.79(m,3H),7.67(d,J=2.5Hz,1H),7.10(dd,J=8.9,2.5Hz,1H),6.81(d,J=9.0Hz,2H),4.21–4.04(m,5H),3.90–3.78(m,1H),3.67–3.49(m,3H),3.46–3.35(m,1H),3.32–3.16(m,2H),3.10–3.03(m,1H),3.01(s,6H),2.74–2.62(m,2H),2.36–2.23(m,2H),1.75–1.65(m,1H).HRMS(ESI):m/zcalcd forC24H32N4O2S3 187Re[M+H]+:691.1245.Found:691.1242。
实施例40合成铼配合物40
由标记前体22和(PPh3)2ReOCl3反应制得铼配合物40,其反应的原料比例、溶剂、反应条件等均与实施例39相同,结构如下,产率:66%,熔点228.7-229.7℃。1H NMR(400MHz,CDCl3)δ7.91(d,J=8.8Hz,2H),7.87(d,J=9.0Hz,1H),7.32(d,J=2.4Hz,1H),7.03(dd,J=8.9,2.4Hz,1H),6.74(d,J=8.9Hz,2H),4.25–4.05(m,5H),3.94–3.84(m,1H),3.83–3.73(m,1H),3.69–3.58(m,1H),3.48–3.31(m,3H),3.31–3.21(m,1H),3.05(s,6H),3.03–2.94(m,2H),2.79–2.70(m,1H),2.10–1.99(m,2H),1.93–1.83(m,2H),1.77–1.66(m,1H).HRMS(ESI):m/z calcd for C25H34N4O2S3 185Re[M+H]+:703.1374.Found:703.1361。
实施例41合成铼配合物41
由标记前体23和(PPh3)2ReOCl3反应制得铼配合物41,其反应的原料比例、溶剂、反应条件等均与实施例39相同,结构如下,产率:53%,熔点229.9-231.0℃。1H NMR(400MHz,CDCl3)δ7.99–7.86(m,3H),7.31(d,J=2.2Hz,1H),7.03(dd,J=8.9,2.2Hz,1H),6.76(d,J=8.6Hz,2H),4.18–4.09(m,3H),4.06(t,J=6.0Hz,2H),3.91–3.82(m,1H),3.82–3.75(m,1H),3.64–3.54(m,1H),3.43–3.31(m,3H),3.30–3.20(m,1H),3.06(s,6H),3.04–2.94(m,2H),2.79–2.70(m,1H),1.97–1.84(m,4H),1.77–1.69(m,1H),1.64–1.58(m,2H).HRMS(ESI):m/z calcd for C26H36N4O2S3 187Re[M+H]+:719.1558.Found:719.1569。
实施例42合成铼配合物42
由标记前体24和(PPh3)2ReOCl3反应制得铼配合物42,其反应的原料比例、溶剂、反应条件等均与实施例39相同,结构如下,产率:29%,熔点211.8-213.1℃。1H NMR(400MHz,CDCl3)δ7.91(d,J=8.9Hz,2H),7.87(d,J=8.9Hz,1H),7.31(d,J=2.4Hz,1H),7.03(dd,J=8.9,2.5Hz,1H),6.75(d,J=8.9Hz,2H),4.16–4.08(m,3H),4.04(t,J=6.2Hz,2H),3.88–3.74(m,2H),3.60–3.50(m,1H),3.40–3.30(m,3H),3.29–3.19(m,1H),3.05(s,6H),3.03–2.93(m,2H),2.77–2.69(m,1H),1.90–1.77(m,4H),1.74–1.66(m,1H),1.62–1.57(m,2H),1.51–1.44(m,2H).HRMS(ESI):m/z calcd for C27H38N4O2S3 185Re[M+H]+:731.1687.Found:731.1699。
实施例43合成铼配合物43
由标记前体25和(PPh3)2ReOCl3反应制得铼配合物43,其反应的原料比例、溶剂、反应条件等均与实施例39相同,结构如下,产率:28%,熔点179.8-181.5℃。1H NMR(400MHz,[D6]-DMSO)δ7.80(d,J=8.9Hz,1H),7.76(d,J=8.7Hz,2H),7.65(d,J=2.5Hz,1H),7.08(dd,J=8.8,2.4Hz,1H),6.64(d,J=8.7Hz,2H),5.75(s,1H),4.16(t,J=6.1Hz,2H),4.14–4.03(m,3H),3.88–3.79(m,1H),3.65–3.50(m,3H),3.44–3.35(m,1H),3.29–3.17(m,2H),3.06(d,J=11.1Hz,1H),2.75(d,J=4.9Hz,3H),2.71–2.64(m,2H),2.35–2.24(m,2H),1.76–1.66(m,1H).HRMS(ESI):m/z calcd for C23H30N4O2S3 187Re[M+H]+:677.1089.Found:677.1080。
实施例44合成铼配合物44
由标记前体26和(PPh3)2ReOCl3反应制得铼配合物44,其反应的原料比例、溶剂、反应条件等均与实施例39相同,结构如下,产率:30%,熔点120.4-121.6℃。1H NMR(400MHz,CDCl3)δ8.01–7.83(m,3H),7.32(d,J=2.3Hz,1H),7.06(d,J=8.9Hz,1H),6.66(d,J=8.6Hz,2H),4.24–4.06(m,5H),3.95–3.86(m,1H),3.83–3.76(m,1H),3.70–3.59(m,1H),3.49–3.32(m,3H),3.32–3.22(m,1H),3.07–2.97(m,2H),2.92(s,3H),2.79–2.71(m,1H),2.12–1.99(m,2H),1.94–1.86(m,2H),1.77–1.68(m,1H).HRMS(ESI):m/z calcdforC24H32N4O2S3 185Re[M+H]+:689.1217.Found:689.1224。
实施例45合成铼配合物45
由标记前体27和(PPh3)2ReOCl3反应制得铼配合物45,其反应的原料比例、溶剂、反应条件等均与实施例39相同,结构如下,产率:37%,熔点187.2-188.6℃。1H NMR(400MHz,CDCl3)δ7.92–7.83(m,3H),7.31(d,J=2.5Hz,1H),7.02(dd,J=8.9,2.5Hz,1H),6.65(d,J=8.7Hz,2H),4.17–4.09(m,3H),4.05(t,J=6.1Hz,2H),3.91–3.82(m,1H),3.82–3.75(m,1H),3.63–3.53(m,1H),3.43–3.31(m,3H),3.29–3.21(m,1H),3.06–2.94(m,2H),2.91(s,3H),2.79–2.71(m,1H),1.96–1.83(m,4H),1.76–1.67(m,1H),1.64–1.55(m,2H).HRMS(ESI):m/z calcd for C25H34N4O2S3 185Re[M+H]+:703.1374.Found:703.1384。
实施例46合成铼配合物46
由标记前体28和(PPh3)2ReOCl3反应制得铼配合物46,其反应的原料比例、溶剂、反应条件等均与实施例39相同,结构如下,产率:61%,熔点111.1-112.3℃。1H NMR(400MHz,CDCl3)δ7.92–7.83(m,3H),7.31(d,J=2.4Hz,1H),7.03(dd,J=8.9,2.5Hz,1H),6.65(d,J=8.7Hz,2H),4.16–4.07(m,3H),4.04(t,J=6.2Hz,2H),3.89–3.74(m,2H),3.59–3.49(m,1H),3.42–3.30(m,3H),3.28–3.19(m,1H),3.05–2.93(m,2H),2.91(s,3H),2.77–2.69(m,1H),1.89–1.77(m,4H),1.74–1.65(m,1H),1.64–1.55(m,2H),1.50–1.41(m,2H).HRMS(ESI):m/z calcd for C26H36N4O2S3 185Re[M+H]+:717.1530.Found:717.1518。
实施例47合成铼配合物47
由标记前体29和(PPh3)2ReOCl3反应制得铼配合物47,其反应的原料比例、溶剂、反应条件等均与实施例39相同,结构如下,产率:53%,熔点236.4-237.9℃。1H NMR(400MHz,DMSO)δ8.71(d,J=2.4Hz,1H),8.09(dd,J=9.0,2.5Hz,1H),7.86(d,J=8.9Hz,1H),7.70(d,J=2.5Hz,1H),7.12(dd,J=8.9,2.5Hz,1H),6.80(d,J=9.1Hz,1H),4.17(t,J=6.2Hz,2H),4.15–4.04(m,3H),3.89–3.79(m,1H),3.65–3.51(m,4H),3.30–3.18(m,2H),3.13(s,6H),3.10–3.02(m,1H),2.75–2.63(m,2H),2.35–2.24(m,2H),1.76–1.66(m,1H).HRMS(ESI):m/z calcd for C23H31N5O2S3 187Re[M+H]+:692.1198.Found:692.1194。
实施例48合成铼配合物48
由标记前体30和(PPh3)2ReOCl3反应制得铼配合物48,其反应的原料比例、溶剂、反应条件等均与实施例39相同,结构如下,产率:44%,熔点231.2-231.9℃。1H NMR(400MHz,CDCl3)δ8.76(d,J=2.1Hz,1H),8.14(d,J=7.4Hz,1H),7.88(d,J=8.9Hz,1H),7.33(d,J=2.4Hz,1H),7.05(dd,J=8.9,2.4Hz,1H),6.60(d,J=8.3Hz,1H),4.26–4.06(m,5H),3.96–3.85(m,1H),3.83–3.75(m,1H),3.71–3.59(m,1H),3.51–3.33(m,3H),3.31–3.24(m,1H),3.19(s,6H),3.07–2.96(m,2H),2.80–2.71(m,1H),2.12–1.99(m,2H),1.95–1.85(m,2H),1.77–1.67(m,1H).HRMS(ESI):m/z calcd for C24H33N5O2S3 185Re[M+H]+:704.1326.Found:704.1323。
实施例49合成铼配合物49
由标记前体31和(PPh3)2ReOCl3反应制得铼配合物49,其反应的原料比例、溶剂、反应条件等均与实施例39相同,结构如下,产率:41%,熔点212.2-213.5℃。1H NMR(400MHz,DMSO)δ8.72(d,J=2.2Hz,1H),8.07(dd,J=8.9,2.3Hz,1H),7.84(d,J=8.9Hz,1H),7.66(d,J=2.3Hz,1H),7.09(dd,J=8.9,2.3Hz,1H),6.78(d,J=9.1Hz,1H),4.18–3.98(m,4H),3.97–3.77(m,2H),3.64–3.56(m,1H),3.49–3.42(m,1H),3.41–3.29(m,2H),3.28–3.16(m,2H),3.13(s,6H),3.08–2.97(m,1H),2.73–2.61(m,2H),1.93–1.75(m,4H),1.73–1.62(m,1H),1.55–1.43(m,2H).HRMS(ESI):m/z calcd for C25H35N5O2S3 187Re[M+H]+:720.1511.Found:720.1500。
实施例50合成铼配合物50
由标记前体32和(PPh3)2ReOCl3反应制得铼配合物50,其反应的原料比例、溶剂、反应条件等均与实施例39相同,结构如下,产率:53%,熔点192.8-194.2℃。1H NMR(400MHz,CDCl3)δ8.76(d,J=2.0Hz,1H),8.15(d,J=8.9Hz,1H),7.87(d,J=8.9Hz,1H),7.32(d,J=2.5Hz,1H),7.04(dd,J=8.9,2.5Hz,1H),6.60(d,J=9.0Hz,1H),4.17–4.07(m,3H),4.04(t,J=6.3Hz,2H),3.90–3.75(m,2H),3.60–3.50(m,1H),3.42–3.31(m,3H),3.29–3.22(m,1H),3.19(s,6H),3.06–2.93(m,2H),2.77–2.70(m,1H),1.91–1.78(m,4H),1.75–1.66(m,1H),1.64–1.56(m,2H),1.52–1.40(m,2H).HRMS(ESI):m/z calcd for C26H37N5O2S3 185Re[M+H]+:732.1639.Found:732.1638。
实施例51合成铼配合物51
由标记前体33和(PPh3)2ReOCl3反应制得铼配合物51,其反应的原料比例、溶剂、反应条件等均与实施例39相同,结构如下,产率:40%,熔点231.5-232.5℃。1H NMR(400MHz,DMSO)δ8.62(d,J=2.3Hz,1H),8.06–7.98(m,1H),7.85(d,J=8.9Hz,1H),7.70(d,J=2.5Hz,1H),7.12(dd,J=8.9,2.5Hz,1H),6.64(d,J=8.9Hz,1H),4.17(t,J=6.2Hz,2H),4.15–4.04(m,3H),3.89–3.80(m,1H),3.65–3.50(m,3H),3.44–3.17(m,3H),3.10–3.00(m,1H),2.87(d,J=3.0Hz,3H),2.75–2.63(m,2H),2.34–2.25(m,2H),1.77–1.66(m,1H).HRMS(ESI):m/z calcd for C22H29N5O2S3 187Re[M+H]+:678.1041.Found:678.1039。
实施例52合成铼配合物52
由标记前体34和(PPh3)2ReOCl3反应制得铼配合物52,其反应的原料比例、溶剂、反应条件等均与实施例39相同,结构如下,产率:32%,熔点205.0-206.2℃。1H NMR(400MHz,CDCl3)δ8.72(d,J=2.1Hz,1H),8.12(dd,J=8.8,2.3Hz,1H),7.88(d,J=8.9Hz,1H),7.33(d,J=2.3Hz,1H),7.06(dd,J=8.9,2.4Hz,1H),6.48(d,J=8.8Hz,1H),4.24–4.06(m,5H),3.95–3.85(m,1H),3.83–3.75(m,1H),3.70–3.59(m,1H),3.47–3.32(m,3H),3.31–3.23(m,1H),3.07–2.96(m,5H),2.78–2.70(m,1H),2.12–1.99(m,2H),1.95–1.84(m,2H),1.78–1.71(m,1H).HRMS(ESI):m/z calcd for C23H31N5O2S3 185Re[M+H]+:690.1170.Found:690.1176。
实施例53合成铼配合物53
由标记前体35和(PPh3)2ReOCl3反应制得铼配合物53,其反应的原料比例、溶剂、反应条件等均与实施例39相同,结构如下,产率:54%,熔点167.7-168.0℃。1H NMR(400MHz,CDCl3)δ8.68(d,J=2.0Hz,1H),8.16(dd,J=8.8,2.3Hz,1H),7.88(d,J=8.9Hz,1H),7.32(d,J=2.5Hz,1H),7.05(dd,J=8.9,2.5Hz,1H),6.52(d,J=8.8Hz,1H),4.18–4.09(m,3H),4.06(t,J=6.1Hz,2H),3.92–3.83(m,1H),3.82–3.76(m,1H),3.63–3.54(m,1H),3.44–3.32(m,3H),3.30–3.21(m,1H),3.06–2.95(m,5H),2.79–2.71(m,1H),1.97–1.84(m,4H),1.77–1.68(m,1H),1.66–1.56(m,2H).HRMS(ESI):m/z calcd for C24H33N5O2S3 185Re[M+H]+:704.1326.Found:704.1313。
实施例54合成铼配合物54
由标记前体36和(PPh3)2ReOCl3反应制得铼配合物54,其反应的原料比例、溶剂、反应条件等均与实施例39相同,结构如下,产率:40%,熔点210.0-211.1℃。1H NMR(400MHz,CDCl3)δ8.70(d,J=1.9Hz,1H),8.14(dd,J=8.8,2.3Hz,1H),7.88(d,J=8.9Hz,1H),7.32(d,J=2.5Hz,1H),7.05(dd,J=8.9,2.5Hz,1H),6.50(d,J=8.8Hz,1H),4.17–4.08(m,3H),4.04(t,J=6.2Hz,2H),3.90–3.75(m,2H),3.61–3.51(m,1H),3.43–3.31(m,3H),3.29–3.21(m,1H),3.06–2.94(m,5H),2.77–2.70(m,1H),1.91–1.77(m,4H),1.74–1.66(m,1H),1.65–1.56(m,2H),1.52–1.42(m,2H).HRMS(ESI):m/z calcd for C25H35N5O2S3 185Re[M+H]+:718.1483.Found:718.1498。
实施例55合成铼配合物55
由标记前体37和(PPh3)2ReOCl3反应制得铼配合物55,其反应的原料比例、溶剂、反应条件等均与实施例39相同,结构如下,产率:62%,熔点200.8-201.5℃。1H NMR(400MHz,CDCl3)δ7.90(d,J=9.0Hz,2H),7.86(d,J=8.9Hz,1H),7.33(d,J=2.5Hz,1H),7.02(dd,J=8.9,2.5Hz,1H),6.74(d,J=9.0Hz,2H),4.29–4.25(m,1H),4.25–4.21(m,2H),4.14–4.08(m,1H),4.08–4.01(m,1H),4.00–3.96(m,2H),3.95–3.92(m,1H),3.91–3.87(m,2H),3.87–3.83(m,1H),3.81–3.75(m,1H),3.54–3.47(m,1H),3.47–3.39(m,1H),3.38–3.30(m,1H),3.22–3.15(m,2H),3.06(s,6H),3.04–2.96(m,1H),2.74–2.69(m,1H),1.81–1.73(m,1H).HRMS(ESI):m/z calcd for C25H34N4O3S3 185Re[M+H]+:719.1323.Found:719.1326.
实施例56合成铼配合物56
由标记前体38和(PPh3)2ReOCl3反应制得铼配合物56,其反应的原料比例、溶剂、反应条件等均与实施例39相同,结构如下,产率:30%,熔点214.3-215.1℃。1H NMR(400MHz,CDCl3)δ8.76(d,J=2.1Hz,1H),8.14(d,J=8.8Hz,1H),7.87(d,J=8.9Hz,1H),7.34(d,J=2.5Hz,1H),7.04(dd,J=8.9,2.5Hz,1H),6.60(d,J=9.0Hz,1H),4.29–4.26(m,1H),4.25–4.22(m,2H),4.14–4.09(m,1H),4.08–4.02(m,1H),4.01–3.96(m,2H),3.96–3.92(m,1H),3.92–3.89(m,2H),3.88–3.83(m,1H),3.81–3.76(m,1H),3.53–3.48(m,1H),3.47–3.40(m,1H),3.38–3.31(m,1H),3.23–3.16(m,8H),3.04–2.96(m,1H),2.74–2.69(m,1H),1.80–1.73(m,1H).HRMS(ESI):m/z calcd for C24H33N5O3S3 185Re[M+H]+:720.1272.Found:720.1275.
上述N2S2类2-芳基苯并噻唑化合物的合成路线如图6所示。
上述各实施例制备的化合物均可以通过现有技术中的常规方法标记放射性核素99mTc,标记反应通式如图7所示,方法如下:取0.05mg标记前体溶于100μL三氟乙酸中,室温静置5min。加入2μL三乙基硅烷,室温静置10min,氮气吹干。加入50μL无水乙醇溶解,加入新鲜制备的99mTc-GH,90℃加热10min后即得99mTc标记配合物。
所得配合物进行HPLC检测。HPLC分析条件:Venusil MP C18柱(AgelaTechnologies,5μm,4.6×250mm);CH3CN/H2O=80%/20%;流速,1mL/min。
表1 99mTc标记配合物(实施例57-65)
实施例66N2S2类2-芳基苯并噻唑化合物的效果实验
以下通过体外竞争结合实验、荧光染色实验和体外放射自显影实验对本发明所述化合物进行亲和力评价,充分验证它们与Aβ斑块的亲和力。通过正常小鼠体内分布实验对标记化合物进行初始脑摄取及脑清除速率评价。
1.竞争结合实验
竞争结合实验(Ki测定):一定浓度的Aβ1-42聚集体与一定浓度的放射性配基[125I]IMPY发生结合反应,反应系统中同时加入不同浓度的待测铼配合物无与[125I]IMPY发生竞争反应,平衡后分离复合物通过测定放射性来计算抑制常数(Ki)。
1.1实验步骤:
(1)配制pH=7.4的PBS(0.2M)缓冲液4L;
(2)放射配基[125I]IMPY按照已有方法制备;将[125I]IMPY配制成100000cpm/100μL的水溶液;
(3)将待测化合物配制成10-3至10-9mol/L连续稀释的乙醇溶液;
(4)受体Aβ1-42蛋白按照已有方法制备。将其稀释成约30nM的水溶液;
(5)玻璃纤维滤膜用含0.1%(体积分数)聚乙烯亚胺的PBS溶液浸泡0.5h;
(6)在12×75mm硼硅玻璃管中分别加入100μL不同浓度待测化合物溶液和100μL[125I]IMPY溶液、700μL PBS及100μL Aβ1-42溶液。用封口膜封好,涡旋;
(7)在37℃恒温水浴中振荡孵育2h;
(8)多头细胞收集器收集反应液,用PBS冲洗三遍,每次3mL;
(9)用γ计数仪测量计数;
(10)数据处理。
1.2实验结果:
由竞争结合实验得到的半抑制常数(IC50)以及进一步根据公式计算出的抑制常数Ki见表2。
表2本发明制备的化合物与Aβ1-42聚集体亲和力常数
通过上述竞争结合实验可知,本发明提供的化合物均与Aβ1-42聚集体具有一定的的亲和力,特别是化合物40-42,44,46,49,50和55的亲和力较高,Ki值小于50nM。
2.荧光染色实验
2.1实验步骤:
2.1.1小鼠脑切片的荧光染色
(1)分别配制铼化合物(40-42,44,46,49,50,55和56)的40%的乙醇溶液,浓度为1μM;
(2)将12个月龄转基因小鼠脑切片(石蜡)和两片正常小鼠脑切片(石蜡)依次经过3×20min的二甲苯脱蜡,然后依次经过2×5min的100%的乙醇,2×5min的95%的乙醇,5min的80%的乙醇和5min的70%的乙醇洗涤,流水冲洗10min后,置于10mM的PBS(pH=7.4)中;
(3)将小鼠脑切片分别浸于待测化合物溶液中10min;
(4)切片经过40%的乙醇洗涤后,采用荧光显微镜观察。
2.1.2AD患者脑切片的荧光染色
步骤及方法同上。
2.2实验结果:
实验结果如图1-4所示,其中图1是铼配合物(40-42,44,46,49,50)的AD转基因小鼠脑切片的荧光染色结果(A-G),图2是铼配合物(55和56)的AD转基因小鼠脑切片的荧光染色结果(A和C),很明显这些化合物都与Aβ斑块有结合,而且相邻脑切片均经过硫磺素-S染色进行对照(图1,H-N;图2,B和D),均能得到良好的匹配。图3是铼配合物(40-42,44,46,49,50)的AD人脑切片的荧光染色结果,图4是铼配合物(55和56)的AD人脑切片的荧光染色结果,均能很明显地观测到脑切片上的Aβ斑块。通过以上结果,充分说明本发明的化合物能与脑内Aβ斑块有效结合。
3.放射自显影实验
将一定浓度的99mTc标记化合物与AD转基因小鼠脑切片中的斑块结合后,通过磷屏曝光,后用储磷屏系统分析图像。
3.1实验步骤:
(1)预处理AD转基因小鼠脑切片与荧光染色实验步骤(2)相同;
(2)在AD转基因小鼠脑切片上覆盖约20μCi的99mTc标记化合物(40-42,44,46,49,50)200μL,室温下孵育60分钟;
(3)用40%乙醇溶液冲洗5分钟,流水冲洗5分钟;
(4)晾干后,置于磷屏下曝光60分钟,用储磷屏系统成像。
3.2实验结果:
实验结果如图5所示,99mTc标记化合物能够特异性与脑中Aβ斑块结合,充分说明本发明的化合物被放射性核素标记后,可以作为Aβ斑块的显像剂。
4.正常小鼠体内分布实验
通过体内分布实验研究了99mTc标记化合物(40-42,44,46,49,50,55和56)在ICR小鼠体内的药代动力学性质。
4.1实验步骤:
将5-10μCi标记化合物(100μL生理盐水溶液,含10%乙醇)由尾静脉注射入正常小鼠(ICR,雄性,20-22g)体内(n=5),分别于注射后2分钟、10分钟、30分钟和60分钟将其断头处死,解剖取出相关脏器,测量湿重及放射性计数。数据表示为脏器中放射性百分剂量(%ID/organ)和每克脏器中放射性百分剂量(%ID/g)。
4.2实验结果:
实验结果如表3所示,本发明提供的[99mTc]44在2min的初始脑摄取较高,而且脑清除也较快,因此可能成为一种用于诊断AD的Aβ斑块显像剂。
表3 99mTc标记化合物的正常小鼠(n=5)体内生物分布a
注:a表示%ID/g,平均值±标准偏差,b表示%ID/脏器。
虽然,上文中已经用一般性说明及具体实施方案对本发明作了详尽的描述,但在本发明基础上,可以对之作一些修改或改进,这对本领域技术人员而言是显而易见的。因此,在不偏离本发明精神的基础上所做的这些修改或改进,均属于本发明要求保护的范围。
Claims (10)
1.与Aβ斑块具有高亲和力的N2S2类2-芳基苯并噻唑化合物,其特征在于,其结构如式(I)所示:
其中,M为Re或99mTc,X为CH或N,R为H或CH3,Y为-(CH2)nO-或-(CH2CH2O)n-;Y为-(CH2)nO-时,n为3-6之间的整数,Y为-(CH2CH2O)n-时,n为2或3。
2.根据权利要求1所述的化合物,其特征在于,所述化合物为:
3.权利要求1或2所述化合物的制备方法,其特征在于,当M为Re且Y为-(CH2)nO-时,所述化合物的制备方法包括以下步骤:
S11、称取1.0mmol化合物(Ⅱ),2.0mmol 1,n-二溴烷烃和1.0mmol碳酸钾于100mL圆底烧瓶中,加入30mL乙腈,90℃加热回流2h,趁热抽滤,所得滤液减压除去溶剂,加入少量石油醚,有固体析出,抽滤,用石油醚充分冲洗所得固体,烘干,得化合物(Ⅲ);
S12、称取0.30mmol化合物Ⅲ、0.25mmol BAT-Boc、0.50mmol碳酸钾和0.25mmol碘化钾于100mL圆底烧瓶中,加入40mL乙腈,90℃加热回流过夜;反应结束后,趁热抽滤,所得滤液减压除去溶剂,硅胶柱层析分离纯化得标记前体(Ⅳ);
S13、称取0.10mmol标记前体(Ⅳ)于50mL圆底烧瓶中,置于冰水浴,先加入2mL三氟乙酸,搅拌5min,再加入40μL三乙基硅烷,搅拌10min,减压除去三氟乙酸,加入0.10mmol(PPh3)2ReOCl3、20mL CH2Cl2与MeOH按9:1体积比的混合溶剂和适量无水乙酸钠,90℃加热回流2h;反应结束后,减压除去溶剂,硅胶柱层析分离纯化即得;
其中,所述化合物(Ⅱ)、化合物(Ⅲ)和标记前体(Ⅳ)的结构式如下:
4.权利要求1或2所述化合物的制备方法,当M为99mTc且Y为-(CH2)nO-时,所述化合物的制备方法包括以下步骤:
S21、称取1.0mmol化合物(Ⅱ),2.0mmol 1,n-二溴烷烃和1.0mmol碳酸钾于100mL圆底烧瓶中,加入30mL乙腈,90℃加热回流2h,趁热抽滤,所得滤液减压除去溶剂,加入少量石油醚,有固体析出,抽滤,用石油醚充分冲洗所得固体,烘干,得化合物(Ⅲ);
S22、称取0.30mmol化合物Ⅲ、0.25mmol BAT-Boc、0.50mmol碳酸钾和0.25mmol碘化钾于100mL圆底烧瓶中,加入40mL乙腈,90℃加热回流过夜;反应结束后,趁热抽滤,所得滤液减压除去溶剂,硅胶柱层析分离纯化得标记前体(Ⅳ);
S23、取0.05mg标记前体(Ⅳ)溶于100μL三氟乙酸中,室温静置5min,加入2μL三乙基硅烷,室温静置10min,氮气吹干,加入50μL无水乙醇溶解,加入新鲜制备的99mTc-GH,90℃加热10min后即得。
5.权利要求1或2所述化合物的制备方法,当M为Re、且Y为-(CH2CH2O)n-时,所述化合物的制备方法包括以下步骤:
S31、称取1.00mmol化合物(Ⅱ),1.20mmol HO(CH2CH2O)nCl和2.00mmol碳酸钾于100mL圆底烧瓶中,加入5mL DMF,110℃加热4h,加入去离子水,二氯甲烷萃取,有机相合并后经无水硫酸钠干燥,滤除干燥剂,旋蒸除去溶剂,加入少量石油醚,有固体析出,抽滤,用石油醚充分冲洗所得固体,烘干,得化合物(Ⅴ);
S32、称取0.80mmol化合物(Ⅴ)用二氯甲烷溶解,冰水浴中搅拌,加入三苯基膦1.60mmol,加入1.60mmolN-溴代丁二酰亚胺,冰水浴中反应1h,加入5mL饱和NaHSO4溶液搅拌30min,加入去离子水,加饱和NaHCO3中和,二氯甲烷萃取,合并有机相,无水硫酸镁干燥,旋蒸除去溶剂,硅胶柱分离得化合物(Ⅵ);
S33、称取0.30mmol化合物(Ⅵ)、0.25mmol BAT-Boc、0.50mmol碳酸钾和0.25mmol碘化钾于100mL圆底烧瓶中,加入40mL乙腈,90℃加热回流过夜;反应结束后,趁热抽滤,所得滤液减压除去溶剂,硅胶柱层析分离纯化得标记前体(Ⅶ);
S34、称取0.10mmol标记前体(Ⅶ)于50mL圆底烧瓶中,置于冰水浴,先加入2mL三氟乙酸,搅拌5min,再加入40μL三乙基硅烷,搅拌10min,减压除去三氟乙酸,加入0.10mmol(PPh3)2ReOCl3、20mL CH2Cl2与MeOH按9:1体积比的混合溶剂和适量无水乙酸钠,90℃加热回流2h;反应结束后,减压除去溶剂,硅胶柱层析分离纯化即得;
其中,所述化合物(Ⅱ)、化合物(Ⅴ)、化合物(Ⅵ)和标记前体(Ⅶ)的结构式如下:
6.权利要求1或2所述化合物的制备方法,当M为99mTc且Y为-(CH2CH2O)n-时,所述化合物的制备方法包括以下步骤:
S41、称取1.00mmol化合物(Ⅱ),1.20mmol HO(CH2CH2O)nCl和2.00mmol碳酸钾于100mL圆底烧瓶中,加入5mL DMF,110℃加热4h,加入去离子水,二氯甲烷萃取,有机相合并后经无水硫酸钠干燥,滤除干燥剂,旋蒸除去溶剂,加入少量石油醚,有固体析出,抽滤,用石油醚充分冲洗所得固体,烘干,得化合物(Ⅴ);
S42、称取0.80mmol化合物(Ⅴ)用二氯甲烷溶解,冰水浴中搅拌,加入三苯基膦1.60mmol,加入1.60mmolN-溴代丁二酰亚胺,冰水浴中反应1h,加入5mL饱和NaHSO4溶液搅拌30min,加入去离子水,加饱和NaHCO3中和,二氯甲烷萃取,合并有机相,无水硫酸镁干燥,旋蒸除去溶剂,硅胶柱分离得化合物(Ⅵ);
S43、称取0.30mmol化合物(Ⅵ)、0.25mmol BAT-Boc、0.50mmol碳酸钾和0.25mmol碘化钾于100mL圆底烧瓶中,加入40mL乙腈,90℃加热回流过夜;反应结束后,趁热抽滤,所得滤液减压除去溶剂,硅胶柱层析分离纯化得标记前体(Ⅶ);
S44、取0.05mg标记前体(Ⅶ)溶于100μL三氟乙酸中,室温静置5min,加入2μL三乙基硅烷,室温静置10min,氮气吹干,加入50μL无水乙醇溶解,加入新鲜制备的99mTc-GH,90℃加热10min后即得。
7.权利要求1或2所述化合物在制备核医学单光子显像剂中的应用。
8.由权利要求1或2所述化合物制备的核医学单光子显像剂。
9.权利要求1或2所述化合物在制备与β-淀粉样蛋白沉积相关中枢疾病的诊断试剂中的应用。
10.由权利要求1或2所述化合物制备的与β-淀粉样蛋白沉积相关中枢疾病的诊断试剂。
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