CN116199563B - 一种用于艾地骨化醇20s异构体的合成方法 - Google Patents
一种用于艾地骨化醇20s异构体的合成方法 Download PDFInfo
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- MECHNRXZTMCUDQ-RKHKHRCZSA-N vitamin D2 Chemical compound C1(/[C@@H]2CC[C@@H]([C@]2(CCC1)C)[C@H](C)/C=C/[C@H](C)C(C)C)=C\C=C1\C[C@@H](O)CCC1=C MECHNRXZTMCUDQ-RKHKHRCZSA-N 0.000 claims abstract description 4
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- C07C45/27—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation
- C07C45/29—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation of hydroxy groups
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
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Abstract
本发明涉及艾地骨化醇杂质合成技术领域,具体为一种用于艾地骨化醇20S异构体的合成方法,以Vitamin D2为合成方法的起始原料合成得到去手性化的中间产物IP‑Ⅲ;中间产物IP‑Ⅲ通过烯基官能团与烷基溴发生偶联反应、并且在手性配体的作用下生成以20S构型为主、同时含有20R构型的中间产物IP‑Ⅳ;制备并且利用含有艾地骨化醇杂质41分子印迹的聚合物MIPMMA‑EI41从中间产物IP‑Ⅳ中富集分离出中间产物IP‑Ⅳ‑20S构型,以此合成本发明的目标产物TP;本发明提供了一种合成艾地骨化醇20S异构体CD环中间体的新技术路线,并且提供了一种用于制备和提纯中间产物IP‑Ⅳ‑20S构型的工艺方法。
Description
技术领域
本发明涉及艾地骨化醇杂质合成技术领域,具体为一种用于艾地骨化醇20S异构体的合成方法。
背景技术
发明专利号CN114656384 A公开了一种艾地骨化醇20S异构体的制备方法,其在背景技术中记载了采用汇聚法制备艾地骨化醇20S异构体的合成步骤,本发明的目标是合成艾地骨化醇20S异构体CD环中间体,其化学结构式如图8所示。
发明内容
为了实现本发明的技术目标,提供如下技术方案:
一种用于艾地骨化醇20S异构体的合成方法,所述合成方法包括如下步骤:
步骤1,以Vitamin D2为合成方法的起始原料合成得到去手性化的中间产物IP-Ⅲ;
步骤2,中间产物IP-Ⅲ通过烯基官能团与烷基溴发生偶联反应、并且在手性配体的作用下生成以20S构型为主、同时含有20R构型的中间产物IP-Ⅳ;
步骤3,制备并且利用含有艾地骨化醇杂质41分子印迹的聚合物MIPMMA-EI41从中间产物IP-Ⅳ中富集分离出中间产物IP-Ⅳ-20S构型,以此合成本发明的目标产物TP。
优选的,所述步骤2,偶联反应以锌粉和六水合氯化镍为共同催化剂、在吡啶溶剂中发生。
优选的,所述步骤2,手性配体优选为(R)-2-甲基-CBS-恶唑硼烷。
优选的,所述聚合物MIPMMA-EI41的制备方法如下:
步骤1,以甲基丙烯酸为功能单体、以艾地骨化醇杂质41为模板分子,两者通过氢键作用自组装形成聚合单体MMMA-EI41;
步骤2,聚合单体MMMA-EI41与二乙烯基苯在偶氮二异丁腈引发剂的作用下发生聚合反应,聚合产物采用混合溶剂洗脱,得到含有艾地骨化醇杂质41分子印迹的聚合物MIPMMA-EI41。
优选的,所述步骤2,混合溶剂由9体积份甲醇和1体积份乙酸组成。
优选的,所述聚合物MIPMMA-EI41能够在提纯艾地骨化醇杂质41的工艺中应用。
优选的,所述步骤3,聚合物MIPMMA-EI41从中间产物IP-Ⅳ中富集分离出中间产物IP-Ⅳ-20S构型的具体方法如下:
把由20S构型和20R构型组成的有机相溶解在混合溶剂中,加入聚合物MIPMMA-EI41,震荡吸附,取出聚合物MIPMMA-EI41,洗脱聚合物MIPMMA-EI41,震荡解吸,过滤、减压浓缩,得到中间产物IP-Ⅳ-20S构型。
优选的,所述混合溶剂的体积组成为5%氯仿/20%乙腈/70%甲醇/5%水。
与现有技术相比,本发明具备以下有益的技术效果:
本发明一方面设计合成一种含有艾地骨化醇杂质41分子印迹的聚合物MIPMMA-EI41,其能够特异性选择吸附艾地骨化醇杂质41;
另一方面,以VitaminD2为合成方法的起始原料合成得到去手性化的中间产物IP-Ⅲ,其贫电子烯键官能团与烷基溴发生C(sp3)-C(sp3)偶联反应、并且在手性配体的作用下生成以20S构型为主、同时含有20R构型的中间产物IP-Ⅳ;
利用含有艾地骨化醇杂质41分子印迹的聚合物MIPMMA-EI41从中间产物IP-Ⅳ中富集分离出中间产物IP-Ⅳ-20S构型,进而合成本发明的目标产物TP;
本发明提供了一种合成艾地骨化醇20S异构体CD环中间体的新的技术路线,并且提供了一种用于制备和提纯中间产物IP-Ⅳ-20S构型的工艺方法。
附图说明
图1为艾地骨化醇杂质41的化学结构式;
图2为功能单体(甲基丙烯酸)与模板分子(艾地骨化醇杂质41)通过氢键作用自组装形成聚合单体MMMA-EI41的化学结构式;
图3为本发明所合成中间产物IP-Ⅰ的化学结构式;
图4为本发明所合成中间产物IP-Ⅱ的化学结构式;
图5为本发明所合成中间产物IP-Ⅲ的化学结构式;
图6为本发明所合成中间产物IP-Ⅳ-20S构型(即艾地骨化醇杂质41)的化学结构式;
图7为本发明所合成中间产物IP-Ⅳ-20R构型(即艾地骨化醇CD-2)的化学结构式;
图8为本发明所合成目标产物TP(即艾地骨化醇20S异构体CD环中间体)的化学结构式;
图9为CD二醇的化学结构式。
具体实施方式
实施例1-1:
制备含有艾地骨化醇杂质41分子印迹的聚合物MIPMMA-EI41:把1.128g艾地骨化醇杂质41(其化学结构式如图1所示)溶解在10mL氯仿中,向氯仿溶液中加入688mg甲基丙烯酸,超声分散5min、室温下磁力搅拌1h,得到聚合单体MMMA-EI41(其化学结构式如图2所示),之后向氯仿溶液中加入5.859g二乙烯基苯和0.15g偶氮二异丁腈,振荡0.5h、通氮气0.5h,置于60℃的真空条件下聚合反应5h,把得到的聚合产物过400目筛,采用由9体积份甲醇和1体积份乙酸组成的混合溶剂洗脱艾地骨化醇杂质41分子,直至洗液中检测不出艾地骨化醇杂质41分子,在40℃下真空干燥至恒重,得到含有艾地骨化醇杂质41分子印迹的聚合物MIPMMA-EI41。
实施例1-2:
制备不含有分子印迹的聚合物NIPMMA:把688mg甲基丙烯酸、5.859g二乙烯基苯和0.15g偶氮二异丁腈溶解在10mL氯仿中,振荡0.5h、通氮气0.5h,置于60℃的真空条件下聚合反应5h,把得到的聚合产物过400目筛,在40℃下真空干燥至恒重,得到不含有分子印迹的聚合物NIPMMA。
实施例1-3:
为了测定含有艾地骨化醇杂质41分子印迹的聚合物MIPMMA-EI41与不含有分子印迹的聚合物NIPMMA对艾地骨化醇杂质41分子的吸附能力,实施吸附实验,具体步骤如下:
步骤1:精密称量艾地骨化醇杂质41置于100mL量瓶中,加入混合溶剂(5%氯仿/20%乙腈/70%甲醇/5%水)溶解并稀释,配制浓度分别为0mg/L、25mg/L、50mg/L、75mg/L、100mg/L、150mg/L的艾地骨化醇杂质41溶液;
步骤2:称取6等份含有艾地骨化醇杂质41分子印迹的聚合物MIPMMA-EI41,每份质量为10mg;
步骤3:称取6等份不含有分子印迹的聚合物NIPMMA,每份质量为10mg;
步骤4:分别向浓度0mg/L、25mg/L、50mg/L、75mg/L、100mg/L、150mg/L的艾地骨化醇杂质41溶液中,加入10mg含有艾地骨化醇杂质41分子印迹的聚合物MIPMMA-EI41,超声分散1h,测定各溶液中艾地骨化醇杂质41的浓度,并且计算其吸附量QMIP-EI41;
步骤5:分别向浓度0mg/L、25mg/L、50mg/L、75mg/L、100mg/L、150mg/L的艾地骨化醇杂质41溶液中,加入10mg不含有分子印迹的聚合物NIPMMA,超声分散1h,测定各溶液中艾地骨化醇杂质41的浓度,并且计算其吸附量QNIP-EI41。
实施例1-4:
为了获悉含有艾地骨化醇杂质41分子印迹的聚合物MIPMMA-EI41对艾地骨化醇CD-2(结构式如图7所示)和CD二醇(结构式如图9所示)的吸附能力,实施吸附实验,具体步骤如下:
步骤1:参照实施例1-3中步骤1的方法,配制浓度100mg/L的艾地骨化醇CD-2溶液和浓度100mg/L的CD二醇溶液;
步骤2:称取2等份含有艾地骨化醇杂质41分子印迹的聚合物MIPMMA-EI41,每份质量为10mg;
步骤3:称取2等份不含有分子印迹的聚合物NIPMMA,每份质量为10mg;
步骤4:向浓度100mg/L的艾地骨化醇CD-2溶液中,加入10mg含有艾地骨化醇杂质41分子印迹的聚合物MIPMMA-EI41,超声分散1h,测定艾地骨化醇CD-2溶液的浓度,并且计算其吸附量QMIP-CD-2;
向浓度100mg/L的CD二醇溶液中,加入10mg含有艾地骨化醇杂质41分子印迹的聚合物MIPMMA-EI41,超声分散1h,测定CD二醇溶液的浓度,并且计算其吸附量QMIP-CD;
步骤5:向浓度100mg/L的艾地骨化醇CD-2溶液中,加入10mg不含有分子印迹的聚合物NIPMMA,超声分散1h,测定艾地骨化醇CD-2溶液的浓度,并且计算其吸附量QNIP-CD-2;
向浓度100mg/L的CD二醇溶液中,加入10mg不含有分子印迹的聚合物NIPMMA,超声分散1h,测定CD二醇溶液的浓度,并且计算其吸附量QNIP-CD。
实施例1-5:
含有艾地骨化醇杂质41分子印迹的聚合物MIPMMA-EI41与不含有分子印迹的聚合物NIPMMA在艾地骨化醇杂质41溶液中的吸附实验结果如下表1所示;
表1聚合物MIPMMA-EI41与聚合物NIPMMA在艾地骨化醇杂质41溶液中的吸附实验数据
CI-EI41(mg/L) | QMIP-EI41(mg/mg) | QNIP-EI41(mg/mg) | IFEI41 |
0 | 0 | 0 | 0 |
25 | 0.022 | 0.004 | 5.50 |
50 | 0.040 | 0.009 | 4.44 |
75 | 0.065 | 0.011 | 5.91 |
100 | 0.059 | 0.010 | 5.90 |
150 | 0.061 | 0.009 | 6.78 |
其中,吸附量Q=[(CI-CⅡ)×VI]/m
式中:CI为溶液的初始浓度,其单位为mg/L;
CⅡ为溶液在吸附1h后的浓度,其单位为mg/L;
V为溶液的初始体积,其单位为mL;
m为吸附聚合物的质量,其单位为mg;
IFEI41表示艾地骨化醇杂质41的印迹因子,其计算公式为:
IFEI41=QMIP-EI41/QNIP-EI41。
实施例1-6:
含有艾地骨化醇杂质41分子印迹的聚合物MIPMMA-EI41与不含有分子印迹的聚合物NIPMMA在浓度100mg/L的艾地骨化醇CD-2溶液和浓度100mg/L的CD二醇溶液中的吸附实验结果如下表2所示;
表2聚合物MIPMMA-EI41与聚合物NIPMMA在浓度100mg/L溶液的吸附实验数据
QMIP-(mg/mg) | QNIP-(mg/mg) | IF*=QMIP-/QNIP- | |
艾地骨化醇CD-2 | 0.004 | 0.005 | 0.80 |
CD二醇 | 0.007 | 0.013 | 0.54 |
实施例1-7:
根据表1和表2中的数据计算聚合物MIPMMA-EI41对于艾地骨化醇CD-2的选择系数SCCD-2=IFEI41/IFCD-2=5.90/0.80=7.38;
根据表1和表2中的数据计算聚合物MIPMMA-EI41对于CD二醇的选择系数SCCD=IFEI41/IFCD=5.90/0.54=10.96;
据此可知,聚合物MIPMMA-EI41对于艾地骨化醇杂质41具有非常显著的选择性能,能够用于艾地骨化醇杂质41的选择性分离;
并且对于艾地骨化醇CD-2和CD二醇几乎不存在吸附能力。
实施例2-1:
合成中间产物IP-Ⅰ:在200mL混合溶剂(4体积份二氯甲烷和1体积份甲醇)中加入11.88gVitaminD2,在温度-78℃下,通入氮气8min之后、通入臭氧反应2h,加入11.5g硼氢化钠,升温至20℃,磁力搅拌反应18h,淬灭反应,采用二氯甲烷萃取、饱和氯化钠洗涤、无水硫酸钠干燥、混合溶剂(5体积份石油醚和1体积份乙酸乙酯)溶解抽滤洗涤,得到中间产物IP-Ⅰ,其化学结构式如图3所示。
实施例2-2:
合成中间产物IP-Ⅱ:在250mL四氢呋喃中加入5.3g中间产物IP-Ⅰ、6.9g三苯基膦、5.1g咪唑、10g碘,磁力搅拌反应6h,淬灭反应,采用乙酸乙酯萃取、饱和氯化钠洗涤、无水硫酸钠干燥、柱层析(60体积份石油醚和1体积份乙酸乙酯),得到中间产物IP-Ⅱ,其化学结构式如图4所示。
实施例2-3:
合成中间产物IP-Ⅲ:在50mL二甲基亚砜中加入6g中间产物IP-Ⅱ、2g叔丁醇钾,在20℃下磁力搅拌反应3h,淬灭反应,采用乙酸乙酯萃取、饱和氯化钠洗涤、无水硫酸钠干燥、柱层析(10体积份石油醚和1体积份乙酸乙酯),得到中间产物IP-Ⅲ,其化学结构式如图5所示。
实施例2-4:
合成中间产物IP-Ⅳ-20S构型:在200mL吡啶中加入5.17g锌粉、2.1g六水合氯化镍、3g中间产物IP-Ⅲ,在氮气保护下,在60℃下磁力搅拌反应3h,降温至30℃,加入3.1g3-(溴甲基)-2,2-二甲基环氧乙烷和3.58g(R)-2-甲基-CBS-恶唑硼烷手性配体,在30℃下磁力搅拌反应8h,产物采用乙酸乙酯萃取、去离子水洗涤、稀盐酸洗涤、饱和氯化钠洗涤之后溶解在100mL四氢呋喃中,加入3.92g氢化铝锂,在30℃下磁力搅拌反应3h,把产物过滤、乙酸乙酯洗涤滤渣、饱和氯化铵洗涤滤液并用乙酸乙酯萃取、合并有机相;
所述有机相中包括如图6所示的20S构型和如图7所示的20R构型,采用含有艾地骨化醇杂质41分子印迹的聚合物MIPMMA-EI41从有机相中分离出20S构型,其具体的步骤如下:
把有机相溶解在混合溶剂(5%氯仿/20%乙腈/70%甲醇/5%水)中,加入10g含有艾地骨化醇杂质41分子印迹的聚合物MIPMMA-EI41,震荡吸附1h,取出聚合物MIPMMA-EI41,采用由9体积份甲醇和1体积份乙酸组成的混合溶剂洗脱聚合物MIPMMA-EI41,震荡解吸1h,过滤、减压浓缩,得到中间产物IP-Ⅳ-20S构型。
实施例2-5:
合成目标产物TP:在50mL二氯甲烷溶剂中加入2.5g中间产物IP-Ⅳ-20S构型、6.4g过氧单磺酸钾、0.3g四丁基溴化铵、75mg2,2,6,6-四甲基哌啶氧化物,在30℃下磁力搅拌反应6h,淬灭反应,采用二氯甲烷萃取,合并有机相,饱和氯化钠洗涤、无水硫酸钠干燥,柱层析(5体积份石油醚和1体积份乙酸乙酯),得到目标产物TP(即艾地骨化醇20S异构体的CD环中间体),其化学结构式如图8所示;
目标产物TP的核磁共振谱表征结果为:
1HNMR(600MHz,CDCl3),δ:0.88(d,3H),1.09-1.13(m,1H),1.12(s,3H),1.16-1.21(m,2H),(m,2H),1.23-1.26(m,2H),1.26-1.31(m,1H),1.24(s,6H),1.32-1.36(m,2H),1.54-2.38(m,11H),1.79-1.82(m,1H);
13CNMR(150MHz,CDCl3),δ:13.3(q,CH3),19.4(q,CH3),29.8(q,2个CH3),61(d,CH),55.6(d,CH),35.5(d,CH),49.9(s,C),72.3(s,C),211.5(s,C),21.5(t,CH2),22.5(t,CH2),23.4(t,CH2),36.4(t,CH2),26.5(t,CH2),39.8(t,CH2),41.6(t,CH2),44(t,CH2)。
Claims (1)
1.一种用于艾地骨化醇20S异构体CD环中间体的合成方法,其特征在于,包括如下步骤:
合成中间产物IP-Ⅰ:在200mL混合溶剂Ⅰ中加入11.88gVitamin D2,在温度-78℃下,通入氮气8min之后、通入臭氧反应2h,加入11.5g硼氢化钠,升温至20℃,磁力搅拌反应18h,淬灭反应,采用二氯甲烷萃取、饱和氯化钠洗涤、无水硫酸钠干燥、混合溶剂Ⅱ溶解抽滤洗涤,得到中间产物IP-Ⅰ;
其中,混合溶剂Ⅰ由4体积份二氯甲烷和1体积份甲醇组成;
混合溶剂Ⅱ由5体积份石油醚和1体积份乙酸乙酯组成;
中间产物IP-Ⅰ的化学结构式为:;
合成中间产物IP-Ⅱ:在250mL四氢呋喃中加入5.3g中间产物IP-Ⅰ、6.9g三苯基膦、5.1g咪唑、10g碘,磁力搅拌反应6h,淬灭反应,采用乙酸乙酯萃取、饱和氯化钠洗涤、无水硫酸钠干燥、柱层析Ⅰ,得到中间产物IP-Ⅱ;
其中,柱层析Ⅰ的洗脱剂由60体积份石油醚和1体积份乙酸乙酯组成;
中间产物IP-Ⅱ的化学结构式为:;
合成中间产物IP-Ⅲ:在50mL二甲基亚砜中加入6g中间产物IP-Ⅱ、2g叔丁醇钾,在20℃下磁力搅拌反应3h,淬灭反应,采用乙酸乙酯萃取、饱和氯化钠洗涤、无水硫酸钠干燥、柱层析Ⅱ,得到中间产物IP-Ⅲ;
其中,柱层析Ⅱ的洗脱剂由10体积份石油醚和1体积份乙酸乙酯组成;
中间产物IP-Ⅲ的化学结构式为:;
合成中间产物IP-Ⅳ-20S构型:在200mL吡啶中加入5.17g锌粉、2.1g六水合氯化镍、3g中间产物IP-Ⅲ,在氮气保护下,在60℃下磁力搅拌反应3h,降温至30℃,加入3.1g3-(溴甲基)-2,2-二甲基环氧乙烷和3.58g(R)-2-甲基-CBS-恶唑硼烷手性配体,在30℃下磁力搅拌反应8h,产物采用乙酸乙酯萃取、去离子水洗涤、稀盐酸洗涤、饱和氯化钠洗涤之后溶解在100mL四氢呋喃中,加入3.92g氢化铝锂,在30℃下磁力搅拌反应3h,把产物过滤、乙酸乙酯洗涤滤渣、饱和氯化铵洗涤滤液并用乙酸乙酯萃取、合并有机相;
所述有机相中包括中间产物IP-Ⅳ-20S构型和中间产物IP-Ⅳ-20R构型,采用含有艾地骨化醇杂质41分子印迹的聚合物MIPMMA-EI41从有机相中分离出中间产物IP-Ⅳ-20S构型,其具体的步骤如下:
把有机相溶解在混合溶剂Ⅲ中,加入10g含有艾地骨化醇杂质41分子印迹的聚合物MIPMMA-EI41,震荡吸附1h,取出聚合物MIPMMA-EI41,采用混合溶剂Ⅳ洗脱聚合物MIPMMA-EI41,震荡解吸1h,过滤、减压浓缩,得到中间产物IP-Ⅳ-20S构型;
其中,混合溶剂Ⅲ由5%氯仿/20%乙腈/70%甲醇/5%水组成;
混合溶剂Ⅳ由9体积份甲醇和1体积份乙酸组成;
中间产物IP-Ⅳ-20S构型的化学结构式为:;
中间产物IP-Ⅳ-20R构型的化学结构式为:;
合成艾地骨化醇20S异构体CD环中间体:在50mL二氯甲烷溶剂中加入2.5g中间产物IP-Ⅳ-20S构型、6.4g过氧单磺酸钾、0.3g四丁基溴化铵、75mg2,2,6,6-四甲基哌啶氧化物,在30℃下磁力搅拌反应6h,淬灭反应,采用二氯甲烷萃取,合并有机相,饱和氯化钠洗涤、无水硫酸钠干燥,柱层析Ⅲ,得到艾地骨化醇20S异构体CD环中间体;
其中,柱层析Ⅲ的洗脱剂由5体积份石油醚和1体积份乙酸乙酯组成;
艾地骨化醇20S异构体CD环中间体的化学结构式为:
;
所述聚合物MIPMMA-EI41的制备方法如下:
步骤1,以甲基丙烯酸为功能单体、以艾地骨化醇杂质41为模板分子,两者通过氢键作用自组装形成聚合单体MMMA-EI41;
聚合单体MMMA-EI41的化学结构式为:
;
步骤2,聚合单体MMMA-EI41与二乙烯基苯在偶氮二异丁腈引发剂的作用下发生聚合反应,聚合产物采用混合溶剂Ⅴ洗脱,得到含有艾地骨化醇杂质41分子印迹的聚合物MIPMMA-EI41;
其中,混合溶剂Ⅴ由9体积份甲醇和1体积份乙酸组成。
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