CN111087417A - 含有C-Si键的甲基二苯基硅烷类化合物的合成方法 - Google Patents
含有C-Si键的甲基二苯基硅烷类化合物的合成方法 Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/02—Silicon compounds
- C07F7/08—Compounds having one or more C—Si linkages
- C07F7/0803—Compounds with Si-C or Si-Si linkages
- C07F7/0805—Compounds with Si-C or Si-Si linkages comprising only Si, C or H atoms
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/02—Silicon compounds
- C07F7/08—Compounds having one or more C—Si linkages
- C07F7/0803—Compounds with Si-C or Si-Si linkages
- C07F7/081—Compounds with Si-C or Si-Si linkages comprising at least one atom selected from the elements N, O, halogen, S, Se or Te
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/02—Silicon compounds
- C07F7/08—Compounds having one or more C—Si linkages
- C07F7/0803—Compounds with Si-C or Si-Si linkages
- C07F7/0825—Preparations of compounds not comprising Si-Si or Si-cyano linkages
- C07F7/0827—Syntheses with formation of a Si-C bond
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Abstract
本发明公开了一种含有C‑Si键的甲基二苯基硅烷类化合物的合成方法。所述方法为在硝酸银的催化作用下,以过硫酸钾为氧化剂,乙腈为溶剂,将二甲基苯基硅羧酸、含炔或烯烃的化合物为混合后采用一锅法50℃~100℃反应得到含C‑Si键的甲基二苯基硅烷类化合物。本发明方法条件温和,能够一步得到复杂结构的C‑Si化合物,直接以商业可得的烯烃或者炔烃为底物,省去了预官能团化过程,减少了反应步骤,具有较高的原子经济性,对简单的羧酸分子结构进行修饰,生成含硅原子的新型化合物,该化合物可进一步用于医药或全合成等研究,在药物化学等领域具有广阔的应用前景。
Description
技术领域
本发明属于有机合成化学技术领域,涉及一种含有C-Si键的甲基二苯基硅烷类化合物的合成方法。
背景技术
近年来,过渡金属催化的C-H键官能化已成为催化领域的研究热点。这种C-H键官能化策略提供了一种简洁的途径,将C-H键直接转化为各种有价值的C-C和C-杂原子键(例如,C-卤化物,C-O,C-N和C-S),这将简化许多合成过程并减少不需要的副产物的形成。在C-C键形成的方法中,两个C-H键的催化脱氢交叉偶联代表了原子和经济的理想策略。然而,已知的反应通常具有高反应温度,低化学选择性,区域选择性以及狭窄的底物范围。考虑到这些限制以及上述有机卤化物和有机金属试剂的缺点,合成化学家一直在寻求通过C-H键官能化形成C-C键的新偶联配偶体,同时尝试一步构建在生物与药物以及材料中广泛含有的C-Si键。
文献1采用苯基硅烷为原料,二碘曙红为光催化剂,氢氧化钾为碱,叔丁基过氧化氢为氧化剂,1,2-二氯乙烷、水为溶剂,25W白灯光照的条件下,反应36h得到C-Si 键苯基环硅烷化合物(Adv.Synth.Catal.2018,360,1–7)。文献2采用正丁烯酸乙酯和苯基二甲基硅烷为原料,在光催化剂4CzIPN,乙腈为溶剂,金刚烷为HAT试剂,二异丙基乙胺为碱,25W蓝光灯的条件下,反应24h得到苯基二甲基硅烷类化合物(Angew. Chem.Int.Ed.2017,56,16621–16625)。上述方法所需添加物多,催化剂昂贵,反应所需成本极高,反应时间长,适用性很窄,会产生污染性气体,并且原子经济性很差,难以简单便捷得到产物。
发明内容
本发明的目的在于提供一种条件温和、高产率、绿色环保、成本低、产物易得的一种含有C-Si键的甲基二苯基硅烷类化合物的合成方法。该方法为自由基反应,Ag(I)氧化SiCOOH,-COOH基团离去,同时Ag(I)被氧化成Ag(II),同时产生Si·自由基,烯烃进攻Si自由基,与Si自由基结合,产生C·自由基,然后C·的电子被Ag(II)捕获,生成Ag(I)的同时,得到含有C-Si键的甲基二苯基硅烷类化合物。
实现本发明目的的技术方案如下:
含有C-Si键的甲基二苯基硅烷类化合物的合成方法,含有C-Si键的甲基二苯基硅烷类化合物的结构式如式III所示,
通过二甲基苯基硅羧酸(结构式如式I所示),含炔或烯烃的化合物(结构式如式II所示),
在硝酸银的催化作用下,以过硫酸钾为氧化剂,乙腈为溶剂,采用一锅煮法,实现含有C-Si键的甲基二苯基硅烷类化合物III的构建,其反应通式为:
具体步骤如下:
在硝酸银的催化作用下,以过硫酸钾为氧化剂,乙腈为溶剂,二甲基苯基硅羧酸、含炔或烯烃的化合物为原料,采用一锅法,混合后在50℃~100℃反应,反应结束后过短硅胶柱,水洗后乙酸乙酯萃取,除去溶剂得粗产物,粗产物经柱层析分离后即得含有 C-Si键的甲基二苯基硅烷类化合物。
优选的,所述的硝酸银摩尔量为二甲基苯基硅羧酸摩尔量的0.05~0.2equive。
优选的,所述的烯烃或炔烃的摩尔量为二甲基苯基硅羧酸摩尔量的2~5equive。
优选的,所述的过硫酸钾摩尔量为二甲基苯基硅羧酸摩尔量的1~3equive。
优选的,所述的含炔或烯烃的化合物选自高价碘炔-4-甲基苯,丙烯酸乙酯或对氰基苯乙烯。
优选的,所述的反应时间为12~48h。
与现有技术相比,本发明具有以下优点:
(1)采用广泛易得、便宜的烯烃、炔烃作为起始原料,一步串联反应合成含C-Si 键的甲基二苯基硅烷类化合物,比传统的多步合成方法更加高效;
(2)运用碳氢活化的反应方法,避免了常规的合成方法的预活化,原子经济性高,方法绿色简便;
(3)反应条件温和,产物易得易纯化,应用前景大,反应无污染气体产生,绿色环保。
具体实施方式
以下通过实施例对本发明作进一步详细说明。
本发明是在硝酸银的催化作用下,以过硫酸钾为氧化剂,乙腈为溶剂,将二甲基苯基硅羧酸,含炔或烯烃的化合物加入其中,采用一锅法50℃~100℃反应,反应结束后,过柱纯化得到含C-Si键的甲基二苯基硅烷类的化合物。该方法条件温和,能够一步得到复杂结构的含C-Si键的甲基二苯基硅烷类化合物,直接以商业可得的烯烃或者炔烃为底物,省去了预官能团化过程,减少了反应步骤,具有较高的原子经济性,对简单的羧酸分子结构进行修饰,生成含硅原子的新型化合物,该化合物可进一步用于医药或全合成等研究,在药物化学等领域具有较高的潜在价值和广阔的应用前景。
实施例1
甲基二苯基(对甲苯乙炔基)硅烷
准确称量硅羧酸(24.2mg,0.1mmol),高价碘苯炔试剂(36.2mg,0.1mmol),硝酸银(1.69mg,0.01mmol),过硫酸钾(32.5mg,0.12mmol),转移至反应容器中,加入2ml 乙腈,旋紧瓶塞,80℃反应24h,反应结束后将反应液冷却至室温,短硅胶过滤除去难溶杂质,用乙酸乙酯和水萃取3次,用卤水萃取1次,有机相去除溶剂得粗产物,粗产物进行柱层析分离(洗脱剂:乙酸乙酯/石油醚=1:100),得到纯净干燥的产物,产率60%。1H NMR(500MHz,Chloroform-d)δ7.71(d,J=3.0Hz,4H),7.51–7.33(m,8H),7.14(d,J =7.3Hz,2H),2.36(d,J=2.5Hz,3H),0.76(d,J=2.6Hz,3H).
实施例2
1-乙氧基-3-(甲基二苯基甲硅烷基)-1-氧丙烷-2-磺酸
准确称量硅羧酸(24.2mg,0.1mmol),硝酸银(1.69mg,0.01mmol),过硫酸钾(32.5mg, 0.12mmol),转移至反应容器中,加入丙烯酸乙酯(16.2μL,0.15mmol),最后加入2ml 乙腈,旋紧瓶塞,80℃反应24h,反应结束后将反应液冷却至室温,短硅胶过滤除去难溶杂质,用乙酸乙酯和水萃取3次,用卤水萃取1次,有机相去除溶剂得粗产物,粗产物进行柱层析分离(洗脱剂:乙酸乙酯/石油醚=1:100),得到纯净干燥的产物,产率 50%。.1H NMR(500MHz,Chloroform-d)δ7.52(dd,J=15.6,7.8Hz,4H),7.46–7.35(m, 6H),5.07(dd,J=9.2,6.8Hz,1H),4.09(dt,J=17.8,8.8Hz,1H),3.97–3.78(m,1H),1.77 (d,J=6.9Hz,1H),1.73–1.63(m,1H),1.18(d,J=7.3Hz,3H),0.74(d,J=8.6Hz,3H).
实施例3
4-(2-(甲基二苯基甲硅烷基)乙基)苄腈:
准确称量硅羧酸(24.2mg,0.1mmol),硝酸银(1.69mg,0.01mmol),过硫酸钾(32.5mg, 0.12mmol),转移至反应容器中,加入对氰基苯乙烯(18μL,0.15mmol),最后加入2ml 乙腈,旋紧瓶塞,80℃反应24h,反应结束后将反应液冷却至室温,短硅胶过滤除去难溶杂质,用乙酸乙酯和水萃取3次,用卤水萃取1次,有机相去除溶剂得粗产物,粗产物进行柱层析分离(洗脱剂:乙酸乙酯/石油醚=1:100),得到纯净干燥的产物,产率45%。1H NMR(500MHz,Chloroform-d)δ7.53(d,J=5.7Hz,6H),7.38(p,J=6.6Hz,6H),7.25 (d,J=7.8Hz,2H),2.77–2.63(m,2H),1.47–1.37(m,2H),0.59(s,3H)。
Claims (6)
2.根据权利要求1所述的合成方法,其特征在于,所述的硝酸银的摩尔量为二甲基苯基硅羧酸摩尔量的0.05~0.2equive。
3.根据权利要求1所述的合成方法,其特征在于,所述的烯烃或炔烃的摩尔量为二甲基苯基硅羧酸摩尔量的2~5equive。
4.根据权利要求1所述的合成方法,其特征在于,所述的过硫酸钾摩尔量为二甲基苯基硅羧酸摩尔量的1~3equive。
5.根据权利要求1所述的合成方法,其特征在于,所述的含炔或烯烃的化合物选自高价碘炔-4-甲基苯,丙烯酸乙酯或对氰基苯乙烯。
6.根据权利要求1所述的合成方法,其特征在于,所述的反应时间为12~48h。
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