WO2022012036A1 - 一种制备不对称二硫醚的方法 - Google Patents

一种制备不对称二硫醚的方法 Download PDF

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WO2022012036A1
WO2022012036A1 PCT/CN2021/075467 CN2021075467W WO2022012036A1 WO 2022012036 A1 WO2022012036 A1 WO 2022012036A1 CN 2021075467 W CN2021075467 W CN 2021075467W WO 2022012036 A1 WO2022012036 A1 WO 2022012036A1
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reaction
disulfide
asymmetric disulfide
preparing
methylthio
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PCT/CN2021/075467
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French (fr)
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杨科
宋梦杰
李义
李正义
孙小强
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常州大学
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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C323/00—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups
    • C07C323/50—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and carboxyl groups bound to the same carbon skeleton
    • C07C323/62—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and carboxyl groups bound to the same carbon skeleton having the sulfur atom of at least one of the thio groups bound to a carbon atom of a six-membered aromatic ring of the carbon skeleton
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C323/00—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups
    • C07C323/50—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and carboxyl groups bound to the same carbon skeleton
    • C07C323/51—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and carboxyl groups bound to the same carbon skeleton having the sulfur atoms of the thio groups bound to acyclic carbon atoms of the carbon skeleton
    • C07C323/60—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and carboxyl groups bound to the same carbon skeleton having the sulfur atoms of the thio groups bound to acyclic carbon atoms of the carbon skeleton with the carbon atom of at least one of the carboxyl groups bound to nitrogen atoms
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C319/00—Preparation of thiols, sulfides, hydropolysulfides or polysulfides
    • C07C319/22—Preparation of thiols, sulfides, hydropolysulfides or polysulfides of hydropolysulfides or polysulfides
    • C07C319/24—Preparation of thiols, sulfides, hydropolysulfides or polysulfides of hydropolysulfides or polysulfides by reactions involving the formation of sulfur-to-sulfur bonds

Definitions

  • the invention belongs to the field of fine chemicals, and relates to a method for preparing asymmetric disulfide N-phenyl-3-(phenyldisulfanyl) propionamide.
  • Asymmetric disulfides are an important class of organic compounds, and their parent skeletons are widely present in various natural products with medicinal activity. At the same time, the compounds are also important intermediates in organic synthesis. Therefore, how to directly and efficiently synthesize such compounds has attracted great attention of chemists.
  • This method uses a sulfide compound and a symmetrical disulfide compound as raw materials, and N-fluorobisbenzenesulfonamide as an additive to construct the target product asymmetric disulfide in one step.
  • This kind of reaction mode has not been reported, and this method does not need to use Metal catalysts and smelly mercaptans.
  • a novel asymmetric disulfide, N-phenyl-3-(phenyldisulfanyl)propionamide was synthesized.
  • the object of the present invention is to overcome the deficiencies of the prior art, and to provide a method for synthesizing an efficient, green asymmetric disulfide N-phenyl-3-(phenyldisulfanyl) propionamide.
  • NFSI N-fluorobis Benzenesulfonamide
  • reaction solvent of the system in the present invention is acetonitrile, 1,2-dichloroethane and dichloromethane, preferably acetonitrile.
  • the concentration of the reaction system is 0.05 to 0.2 mol/liter, preferably 0.1 mol/liter.
  • the molar ratio of 3-methylthio-N-phenylpropanamide, diphenyldisulfide and N-fluorobisbenzenesulfonamide is 1:1:1.
  • reaction temperature described in the present invention is 60-120 degrees Celsius, preferably 80 degrees Celsius.
  • reaction time described in the present invention is 8 to 18 hours, preferably 12 hours.
  • the present invention has the beneficial effects of using 3-methylthio-N-phenylpropionamide and symmetrical diphenyl disulfide as reaction raw materials, and N-fluorobisbenzenesulfonamide as an additive, A new asymmetric disulfide product can be synthesized efficiently in one step. This method is easy to operate, mild in reaction, and avoids the use of unpleasant thiol raw materials or the use of transition metal catalysts, which has potential application value.
  • NMR data and mass spectrometry data of the target product N-phenyl-3-(phenyldisulfanyl)propionamide are as follows:
  • Specific embodiment 2 comparative experiment: acetonitrile (10 mL), 3-methylthio-N-phenylpropionamide (1 mmol, 0.195 g) and diphenyl disulfide (1 mmol, 0.218 g) were added in sequence to a 50 mL sealed tube ), the inverse temperature was controlled at 80 degrees Celsius, and the reaction was vigorously stirred for 12 hours. After the reaction was completed, the reaction solution was concentrated and separated by column chromatography in sequence, and the target product N-phenyl-3-(phenyldisulfanyl)propionamide could not be separated.
  • the equation involved in the reaction is as follows:

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

本发明涉及精细化工技术领域，公开了一种制备不对称二硫醚的方法。具体步骤：以3-甲硫基-N-苯基丙酰胺和二苯二硫醚为原料，N-氟代双苯磺酰胺为添加剂，优选在乙腈溶剂中，加热反应，即可得到目标产物对称二硫醚N-苯基-3-(苯基二硫烷基)丙酰胺。此方法操作简便、反应温和，使用3-甲硫基-N-苯基丙酰胺和对称的二苯二硫醚作为反应原料，一步高效地合成不对称二硫醚产物，避免使用有气味难闻的硫醇原料或者使用过渡金属催化剂，具有潜在的应用价值。

Description

一种制备不对称二硫醚的方法 技术领域
本发明属于精细化工领域，涉及一种制备不对称二硫醚N-苯基-3-(苯基二硫烷基)丙酰胺的方法。
背景技术
不对称二硫醚是一类重要的有机化合物，其母体骨架广泛存在于各类具有药物活性的天然产物中，同时该化合物也是重要的有机合成的中间体。因此，如何直接高效地合成该类化合物已经引起化学工作者的高度关注。
目前合成不对称二硫醚主要有两种方法，第一种使用两种不同的硫醇为原料，通过氧化脱氢合成不对称二硫醚，该类方法存在的缺陷是硫醇的气味难闻，同时该类反应会发生自偶联得到对称的二硫醚；第二种使用二硫烷基试剂在过渡金属催化剂作用下与亲核试剂反应得到目标产物，该类反应的缺陷主要在于使用金属催化剂，不符合绿色环保的特点。
本方法使用硫醚化合物与对称的二硫醚化合物为原料，N-氟代双苯磺酰胺为添加剂一步构建目标产物不对称二硫醚，该类反应模式尚未被报道，此外该方法不需要使用金属催化剂和气味难闻的硫醇。利用该方法，一种全新的不对称二硫醚N-苯基-3-(苯基二硫烷基)丙酰胺被合成。
发明内容
本发明的目的在于克服现有技术的不足，提供一种高效、绿色的不对称二硫醚N-苯基-3-(苯基二硫烷基)丙酰胺的合成方法。
本发明所涉及合成N-苯基-3-(苯基二硫烷基)丙酰胺步骤如下：将3-甲硫基-N-苯基丙酰胺、二苯二硫醚和N-氟代双苯磺酰胺(NFSI)依次加入含有反应溶剂的封管中，加热搅拌反应，反应结束后，依次进行反应液浓缩和柱层析分离，即可获得淡黄色固体N-苯基-3-(苯基二硫烷基)丙酰胺。
进一步，本发明中体系的反应溶剂为乙腈、1,2-二氯乙烷和二氯甲烷，优选乙腈。
进一步，本发明中反应体系的浓度为0.05～0.2摩尔/升，优选0.1摩尔/升。
进一步，本发明中3-甲硫基-N-苯基丙酰胺、二苯二硫醚和N-氟代双苯磺酰胺的摩尔比用量为1：1：1。
进一步，本发明中所述的反应温度为60～120摄氏度，优选80摄氏度。
进一步，本发明中所述的反应时间为8～18小时，优选12小时。
与现有技术相比，本发明的有益效果为：使用3-甲硫基-N-苯基丙酰胺和对称的二苯二硫醚作为反应原料，N-氟代双苯磺酰胺为添加剂，一步高效地合成全新的不对称二硫醚产物，此方法操作简便、反应温和，且避免使用有气味难闻的硫醇原料或者使用过渡金属催化剂，具有潜在的应用价值。
具体实施方式
下面的实施例将有助于说明本发明，但是不局限其范围。
具体实施例1：合成方法：在50mL的封管中依次加入乙腈(10mL)、3-甲硫基-N-苯基丙酰胺(1mmol,0.195g)、二苯二硫醚(1mmol,0.218g)和N-氟代双苯磺酰胺(1mmol,0.315g)，反温度控制在80摄氏度，并且剧烈搅拌反应12小时。反应结束后依次进行反应液浓缩和柱层析分离，最终获得淡黄色固体N-苯基-3-(苯基二硫烷基)丙酰胺(0.187g,65％)。反应涉及的方程式如下：
Figure PCTCN2021075467-appb-000001
目标产物N-苯基-3-(苯基二硫烷基)丙酰胺的核磁数据、质谱数据如下：
1H NMR(300MHz,CDCl 3)δ7.64–7.02(m,11H),3.06(t,J＝6.8Hz,2H),2.71(t,J＝6.9Hz,2H).
13C NMR(75MHz,CDCl 3)δ169.08,137.61,137.16,129.18,129.02,127.88,127.18,124.52,120.07,36.49,34.00.
LCMS(ESI,m/z):290.0[M+H] +.
具体实施例2：对比实验：在50mL的封管中依次加入乙腈(10mL)、3-甲硫基-N-苯基丙酰胺(1mmol,0.195g)和二苯二硫醚(1mmol,0.218g)，反温度控制在80摄氏度， 并且剧烈搅拌反应12小时。反应结束后依次进行反应液浓缩和柱层析分离，无法分离到目标产物N-苯基-3-(苯基二硫烷基)丙酰胺。反应涉及的方程式如下：
Figure PCTCN2021075467-appb-000002
具体实施例3：对比实验：在50mL的封管中依次加入乙腈(10mL)、3-甲硫基-N-苯基丙酰胺(1mmol,0.195g)、二苯二硫醚(1mmol,0.218g)和1-氯甲基-4-氟-1,4-二氮杂双环[2.2.2]辛烷二(四氟硼酸)盐[Selectfluor](1mmol,0.36g)，反温度控制在80摄氏度，并且剧烈搅拌反应12小时。反应结束后依次进行反应液浓缩和柱层析分离，无法分离到目标产物N-苯基-3-(苯基二硫烷基)丙酰胺。反应涉及的方程式如下：
Figure PCTCN2021075467-appb-000003
以上描述了本发明的可选实施方案，以教导本领域技术人员如何实施和再现本发明。为了教导本发明方案，已经对一些常规技术方面进行了简化和省去。本领域技术人员应该理解源自这方面的变型，均在本发明的保护范围之内。

Claims (10)

  1. 一种不对称二硫醚，其特征在于：所述不对称二硫醚为N-苯基-3-(苯基二硫烷基)丙酰胺，结构式如下：
    Figure PCTCN2021075467-appb-100001
  2. 一种根据权利要求1所述不对称二硫醚的制备方法，其特征在于：
    将3-甲硫基-N-苯基丙酰胺、二苯二硫醚和N-氟代双苯磺酰胺(NFSI)依次加入反应溶剂中，在加热的条件下搅拌反应，反应结束后依次进行反应液浓缩和柱层析分离，获得不对称二硫醚N-苯基-3-(苯基二硫烷基)丙酰胺目标产物。
  3. 根据权利要求2所述不对称二硫醚的制备方法，其特征在于：3-甲硫基-N-苯基丙酰胺、二苯二硫醚和N-氟代双苯磺酰胺的摩尔比用量为1：1：1。
  4. 根据权利要求2所述不对称二硫醚的制备方法，其特征在于：反应溶剂为乙腈、1,2-二氯乙烷或二氯甲烷。
  5. 根据权利要求4所述不对称二硫醚的制备方法，其特征在于：反应溶剂为乙腈。
  6. 根据权利要求2所述不对称二硫醚的制备方法，其特征在于：反应温度为60～120摄氏度。
  7. 根据权利要求6所述不对称二硫醚的制备方法，其特征在于：反应温度为80摄氏度。
  8. 根据权利要求2所述不对称二硫醚的制备方法，其特征在于：3-甲硫基-N-苯基丙酰胺在反应体系的浓度为0.05～0.2摩尔/升。
  9. 根据权利要求8所述不对称二硫醚的制备方法，其特征在于：3-甲硫基-N-苯基丙酰胺在反应体系的浓度为0.1摩尔/升。
  10. 根据权利要求2所述不对称二硫醚的制备方法，其特征在于：反应时间为8～18小时。
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CN113563241B (zh) * 2021-07-16 2022-07-26 常州大学 一种nfsi催化合成非对称二硫醚衍生物的方法
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CN115197179B (zh) * 2022-08-04 2023-08-22 常州大学 一种无过渡金属参与的c-s键复分解反应制备硫醚和二硫醚的方法

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