CN112898201A - 硝酸酯化合物以及合成吡啶亚砜亚胺导向的c-h硝酸酯化的方法 - Google Patents
硝酸酯化合物以及合成吡啶亚砜亚胺导向的c-h硝酸酯化的方法 Download PDFInfo
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- -1 Nitrate ester compound Chemical class 0.000 title claims abstract description 31
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- 238000000034 method Methods 0.000 title claims abstract description 22
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 230000032050 esterification Effects 0.000 title claims abstract description 17
- 238000005886 esterification reaction Methods 0.000 title claims abstract description 17
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 229910017604 nitric acid Inorganic materials 0.000 title claims abstract description 15
- 229910002651 NO3 Inorganic materials 0.000 title claims abstract description 14
- 230000002194 synthesizing effect Effects 0.000 title claims abstract description 7
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- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims abstract description 17
- 239000002904 solvent Substances 0.000 claims abstract description 15
- IOGXOCVLYRDXLW-UHFFFAOYSA-N tert-butyl nitrite Chemical compound CC(C)(C)ON=O IOGXOCVLYRDXLW-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000012414 tert-butyl nitrite Substances 0.000 claims abstract description 13
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 12
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 claims abstract description 11
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- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 8
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- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 4
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 4
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 4
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- HEDRZPFGACZZDS-MICDWDOJSA-N Trichloro(2H)methane Chemical compound [2H]C(Cl)(Cl)Cl HEDRZPFGACZZDS-MICDWDOJSA-N 0.000 description 20
- 230000000052 comparative effect Effects 0.000 description 12
- 238000000655 nuclear magnetic resonance spectrum Methods 0.000 description 12
- 238000001644 13C nuclear magnetic resonance spectroscopy Methods 0.000 description 11
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- NFHFRUOZVGFOOS-UHFFFAOYSA-N palladium;triphenylphosphane Chemical compound [Pd].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 NFHFRUOZVGFOOS-UHFFFAOYSA-N 0.000 description 4
- 229910004679 ONO2 Inorganic materials 0.000 description 3
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 3
- 150000001336 alkenes Chemical class 0.000 description 3
- 230000001588 bifunctional effect Effects 0.000 description 3
- 125000001893 nitrooxy group Chemical group [O-][N+](=O)O* 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 229910052723 transition metal Inorganic materials 0.000 description 3
- 150000003624 transition metals Chemical class 0.000 description 3
- XNDZQQSKSQTQQD-UHFFFAOYSA-N 3-methylcyclohex-2-en-1-ol Chemical compound CC1=CC(O)CCC1 XNDZQQSKSQTQQD-UHFFFAOYSA-N 0.000 description 2
- 238000010499 C–H functionalization reaction Methods 0.000 description 2
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- 125000004429 atom Chemical group 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
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- XMPZTFVPEKAKFH-UHFFFAOYSA-P ceric ammonium nitrate Chemical compound [NH4+].[NH4+].[Ce+4].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O XMPZTFVPEKAKFH-UHFFFAOYSA-P 0.000 description 2
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- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 2
- PBDBXAQKXCXZCJ-UHFFFAOYSA-L palladium(2+);2,2,2-trifluoroacetate Chemical compound [Pd+2].[O-]C(=O)C(F)(F)F.[O-]C(=O)C(F)(F)F PBDBXAQKXCXZCJ-UHFFFAOYSA-L 0.000 description 2
- 230000008569 process Effects 0.000 description 2
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- CFMZSMGAMPBRBE-UHFFFAOYSA-N 2-hydroxyisoindole-1,3-dione Chemical compound C1=CC=C2C(=O)N(O)C(=O)C2=C1 CFMZSMGAMPBRBE-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 1
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- 150000001350 alkyl halides Chemical class 0.000 description 1
- HSNWZBCBUUSSQD-UHFFFAOYSA-N amyl nitrate Chemical compound CCCCCO[N+]([O-])=O HSNWZBCBUUSSQD-UHFFFAOYSA-N 0.000 description 1
- WOIVNLSVAKYSKX-UHFFFAOYSA-N benzyl nitrate Chemical compound [O-][N+](=O)OCC1=CC=CC=C1 WOIVNLSVAKYSKX-UHFFFAOYSA-N 0.000 description 1
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- 238000007306 functionalization reaction Methods 0.000 description 1
- 208000019622 heart disease Diseases 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 125000001183 hydrocarbyl group Chemical group 0.000 description 1
- RXPAJWPEYBDXOG-UHFFFAOYSA-N hydron;methyl 4-methoxypyridine-2-carboxylate;chloride Chemical compound Cl.COC(=O)C1=CC(OC)=CC=N1 RXPAJWPEYBDXOG-UHFFFAOYSA-N 0.000 description 1
- 239000002840 nitric oxide donor Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
- C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
- C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D213/62—Oxygen or sulfur atoms
- C07D213/70—Sulfur atoms
- C07D213/71—Sulfur atoms to which a second hetero atom is attached
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- Chemical & Material Sciences (AREA)
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Catalysts (AREA)
- Pyridine Compounds (AREA)
Abstract
Description
技术领域
本发明属于有机合成化学技术领域,涉及一种硝酸酯化合物以及合成吡啶亚砜亚胺导向的C-H硝酸酯化的方法。
背景技术
过渡金属催化的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)。硝酸酯是一类潜在有用的有机化合物,由于其NO供体的特性,已被广泛用作治疗心脏和血管疾病的药物。药用的烷基化硝酸盐,特别是β-羟基硝酸盐,可用于血管扩张药。在许多炸药的设计中,在烃骨架上还掺入了ONO2基团。过渡金属催化也是近年来的研究热点,特别是在C-H活化领域中,而钯催化应用的更为广泛。现已知的反应中没有通过使用过渡金属催化的C-H活化策略来实现硝酸酯化的反应,而已知的生成硝酸酯化合物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。
现有的用于合成硝酸酯化的产物的反应主要包括:(1)用亲核亲核试剂进攻使环氧化合物或者烷基卤化物等开环,得到硝酸酯化产物,例如文献1采用硝酸铋作为硝化试剂,使环氧乙烷发生开环反应,生成了β-羟基硝酸酯化合物,总产率良好,但不具有良好的区域选择性(Helvetica Chimica Acta,2007,90(1):110–113);(2)苄基位的C-H直接与硝化试剂反应,得到高选择性的硝酸酯化产物,例如文献2在催化量的N-羟基邻苯二甲酰亚胺和硝酸铈铵的共同作用下,将苄基化合物转化为苄基硝酸酯,产率良好,但是底物范围受限(Tetrahedron Letters,2008,49(34):5070-5072);(3)烯烃与硝化试剂反应,实现双官能化,从而得到硝酸酯化产物,例如文献3通过亚硝酸叔丁酯和分子氧的组合进行烯烃氧化硝化的方法,以生成β-硝酸酯,其本质上是一个烯烃的双官能化反应,用一个硝基来源同时实现了硝基和硝酸酯基的双官能化(Tetrahedron Letters,2011,52(36):4654-4657)。
上述方法大多都是使用活化的C-H实现硝酸酯化,而通过未活化C-H实现C(sp3)-H硝酸酯化未见报道。
发明内容
本发明的目的之一在于提供一种硝酸酯化合物,其化学结构式如下:
本发明的目的之二在于提供一种条件温和、较高产率、绿色环保的合成吡啶亚砜亚胺导向的C-H硝酸酯化的方法。采用自由基反应,使用易合成的吡啶亚砜亚胺导向基实现羧酸底物的未活化C(sp3)-H硝酸酯化,首先亚硝酸叔丁酯在氧气的作用下,使NO2·自由基被氧化成ONO2·自由基,底物通过和Pd(Ⅱ)结合生成一个六元环状中间体,ONO2·自由基进攻,然后通过进一步的还原消除反应,得到最终的硝酸酯化合物。上述合成吡啶亚砜亚胺导向的C-H硝酸酯化的方法,反应通式为:
具体步骤如下:
吡啶亚砜亚胺导向的羧酸底物在醋酸钯的催化作用下,以亚硝酸叔丁酯作为硝化试剂,1,4-二氧六环为溶剂,在氧气条件下,70~90℃反应12~24h,反应结束后过短硅胶柱,用旋蒸除去溶剂得粗产物,粗产物经柱层析分离后即得得到硝酸酯化产物,所述的吡啶亚砜亚胺导向的羧酸底物的结构式如下:其中,R1基选自甲基、乙基、丙基、丁基、芳香取代基等,R2基为甲基。
优选的,醋酸钯的摩尔量为吡啶亚砜亚胺导向的羧酸底物摩尔量的0.1~0.2equiv。
优选的,亚硝酸叔丁酯的摩尔量为吡啶亚砜亚胺导向的羧酸底物摩尔量的1~5equiv。
优选的,1,4-二氧六环与吡啶亚砜亚胺导向的羧酸底物的体积摩尔比为1:1,ml:mmol。
优选的,柱层析中采用的洗脱剂为甲醇:二氯甲烷的体积比=0.5:100的混合溶液。
与现有技术相比,本发明的显著效果如下:
(1)采用广泛易得、便宜的羧酸作为底物合成的起始原料,一步酰胺化反应即可与导向基结合生成羧酸类底物,比传统的合成方法更加高效。
(2)运用碳氢活化的反应方法,实现了未活化C-H的C(sp3)-H硝酸酯化,原子经济性高,方法绿色简便。
(3)选用氧气作为体系中的氧化剂,更加的绿色,原子利用率也更高。
附图说明
图1为实施例1中产物的核磁共振氢谱(1H NMR)。
图2为实施例1中产物的核磁共振碳谱(13C NMR)。
图3为实施例2中产物的核磁共振氢谱(1H NMR)。
图4为实施例2中产物的核磁共振碳谱(13C NMR)。
图5为实施例3中产物的核磁共振氢谱(1H NMR)。
图6为实施例3中产物的核磁共振碳谱(13C NMR)。
图7为实施例3中产物的核磁共振氢谱(1H NMR)。
图8为实施例3中产物的核磁共振碳谱(13C NMR)。
图9为实施例4中产物的核磁共振氢谱(1H NMR)。
图10为实施例4中产物的核磁共振碳谱(13C NMR)。
图11为实施例5中产物的核磁共振氢谱(1H NMR)。
图12为实施例5中产物的核磁共振碳谱(13C NMR)。
具体实施方式
下面通过具体实施例和附图对本发明作进一步详细说明。
本发明是在醋酸钯的催化作用下,以亚硝酸叔丁酯作为硝化试剂,1,4-二氧六环为溶剂,在氧气条件下,70℃反应24h,反应结束后,过柱纯化得到硝酸酯化合物。该方法条件温和,能够一步得到硝酸酯化合物,直接以商业可得羧酸为底物前体,与导向基通过简单的酰胺化反应即可得到羧酸类底物,合成方法参考文献【Organic letters,2012,14(14):3724-3727,Organic letters,2014,16(20):5258-5261】。反应步骤比较简单,具有较高的原子经济性,该化合物可进一步进行后续衍生,将硝酸酯基转化为其它的基团,也可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
2,2-二甲基-3-((甲基(氧代)(吡啶-2-基)-亚磺酰基)氨基)-3-氧代丙基硝酸盐
准确称量N-(甲基(氧代)(吡啶-2-基)-亚磺酰基)新戊酰胺(24mg,0.1mmol),醋酸钯(2.24mg,0.01mmol)亚硝酸叔丁酯(24μL,0.2mmol),转移至反应容器中,加入1ml的1,4-二氧六环,抽放氧气,旋紧瓶塞,70℃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,去除溶剂得粗产物,粗产物进行柱层析分离(洗脱剂:甲醇/二氯甲烷=0.5:100),得到纯净干燥的产物,单取代:双取代产物>20:1,单取代的产率75%。1H NMR(500MHz,CDCl3)δ8.69(d,J=4.1Hz,1H),8.23(d,J=7.9Hz,1H),8.00(td,J=7.8,1.6Hz,1H),7.56(ddd,J=7.6,4.7,0.7Hz,1H),4.59(d,J=10.0Hz,1H),4.50(d,J=10.0Hz,1H),3.41(s,3H),1.23(d,J=15.4Hz,6H).13C NMR(126MHz,CDCl3)δ183.52,156.43,150.09,138.32,127.53,123.26,78.90,44.19,39.62,22.76,22.58.
实施例2
2-甲基-2-((甲基(氧代)(吡啶-2-基)-亚磺酰基)氨基甲酰基)丁基硝酸酯
准确称量2,2-二甲基-N-(甲基(氧代)(吡啶-2-基)-亚磺酰基)丁酰胺(25.4mg,0.1mmol),醋酸钯(2.24mg,0.01mmol)亚硝酸叔丁酯(24μL,0.2mmol),转移至反应容器中,加入1ml的1,4-二氧六环,抽放氧气,旋紧瓶塞,70℃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,去除溶剂得粗产物,粗产物进行柱层析分离(洗脱剂:甲醇/二氯甲烷=0.5:100),得到纯净干燥的产物,单取代:双取代产物>15:1,单取代的产率65%。1H NMR(500MHz,CDCl3)δ8.72–8.53(m,1H),8.25(d,J=7.9Hz,1H),7.97(td,J=7.8,1.7Hz,1H),7.52(ddd,J=7.6,4.7,0.8Hz,1H),3.39(s,3H),1.56(dd,J=7.3,6.4Hz,2H),1.10(d,J=12.0Hz,6H),0.78(t,J=7.5Hz,3H).13C NMR(126MHz,CDCl3)δ183.02,156.69,149.98,138.25,127.45,123.36,47.80,39.64),29.16,29.00,19.76,8.47.
实施例3
2-甲基-2-((甲基(氧代)(吡啶-2-基)-亚磺酰基)氨基甲酰基)戊基硝酸酯
准确称量2,2-二甲基-N-(甲基(氧代)(吡啶-2-基)-亚磺酰基)戊酰胺(26.8mg,0.1mmol),醋酸钯(2.24mg,0.01mmol)亚硝酸叔丁酯(24μL,0.2mmol),转移至反应容器中,加入1ml的1,4-二氧六环,抽放氧气,旋紧瓶塞,70℃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,去除溶剂得粗产物,粗产物进行柱层析分离(洗脱剂:甲醇/二氯甲烷=0.5:100),得到纯净干燥的产物,单取代:双取代产物>45:33,总产率78%。1H NMR(500MHz,CDCl3)δ8.67(t,J=4.7Hz,1H),8.30–8.16(m,1H),7.99(t,J=7.8Hz,1H),7.63–7.45(m,1H),4.65(dd,J=31.4,10.0Hz,1H),4.45(dd,J=39.1,10.0Hz,1H),3.39(d,J=10.5Hz,3H),1.61–1.40(m,2H),1.19(d,J=12.1Hz,5H),0.89–0.81(m,3H).13C NMR(126MHz,CDCl3)δ183.12,156.68,149.95,138.24,127.42,123.35,77.64,47.59,39.63,38.59,20.22,17.36,14.56.
实施例4
2-甲基-2-((甲基(氧代)(吡啶-2-基)-亚磺酰基)氨基甲酰基)己基硝酸酯
准确称量2-乙基-2-甲基-N-(甲基(氧代)(吡啶-2-基)-亚磺酰基)己酰胺(26.8mg,0.1mmol),醋酸钯(2.24mg,0.01mmol)亚硝酸叔丁酯(24μL,0.2mmol),转移至反应容器中,加入1ml的1,4-二氧六环,抽放氧气,旋紧瓶塞,70℃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,去除溶剂得粗产物,粗产物进行柱层析分离(洗脱剂:甲醇/二氯甲烷=0.5:100),得到纯净干燥的产物,单取代:双取代产物>20:1,单取代的产率67%。1H NMR(500MHz,CDCl3)δ8.67(t,J=4.2Hz,1H),8.23(d,J=7.7Hz,1H),7.99(t,J=7.7Hz,1H),7.54(d,J=3.6Hz,1H),4.65(dd,J=26.6,10.0Hz,1H),4.53–4.37(m,1H),3.39(d,J=10.1Hz,3H),1.69–1.44(m,2H),1.22(dd,J=31.3,6.9Hz,7H),0.85(dd,J=10.2,4.8Hz,3H).13C NMR(126MHz,CDCl3)δ183.11,156.66,149.94,138.23,127.44,123.37,77.63,47.48,39.63,36.09,26.15,23.13,20.22,13.95.
实施例5
2-苄基-2-甲基-3-((甲基(氧代)(吡啶-2-基)-亚磺酰亚氨基)氨基)-3-氧代丙基硝酸酯
准确称量2,2-二甲基-N-(甲基(氧代)(吡啶-2-基)-16-亚磺酰基)-3-苯基丙酰胺(31.6mg,0.1mmol),醋酸钯(2.24mg,0.01mmol)亚硝酸叔丁酯(24μL,0.2mmol),转移至反应容器中,加入1ml的1,4-二氧六环,抽放氧气,旋紧瓶塞,70℃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,去除溶剂得粗产物,粗产物进行柱层析分离(洗脱剂:甲醇/二氯甲烷=0.5:100),得到纯净干燥的产物,单取代:双取代产物>20:1,单取代的产率75%。1H NMR(500MHz,CDCl3)δ8.71(d,J=4.4Hz,1H),8.23(t,J=8.2Hz,1H),7.99(d,J=7.1Hz,1H),7.69–7.40(m,1H),7.23–6.85(m,5H),4.61–4.32(m,2H),3.42(d,J=6.4Hz,3H),3.08–2.84(m,2H),1.22(d,J=3.7Hz,3H).13C NMR(126MHz,CDCl3)δ182.49,156.57,149.99,138.30,136.64,130.26,128.25,127.52,126.72,123.38,76.26,48.35,41.53,41.20,39.60,20.76.
对比例1
本对比例与实施例1基本相同,唯一不同的是采用的催化剂为四(三苯基膦)钯。当催化剂为四(三苯基膦)钯时,硝酸酯化产物的产率只有42%。
对比例2
本对比例与实施例1基本相同,唯一不同的是采用的催化剂为三氟乙酸钯。当催化剂为三氟乙酸钯时,硝酸酯化产物的产率只有53%。
对比例3
本对比例与实施例1基本相同,唯一不同的是采用的硝化试剂为九水硝酸铝。当硝化试剂为九水硝酸铝时,不能得到硝酸酯化得产物。
对比例4
本对比例与实施例1基本相同,唯一不同的是采用的溶剂为二氯甲烷。当溶剂为二氯甲烷时,初始底物的双硝酸酯化产物会增多,单取代:双取代=2:1,总产率为32%。
对比例5
本对比例与实施例1基本相同,唯一不同的是反应温度为110℃。在反应温度为110℃时,会有副产物生成,硝酸酯化产物的产率为48%。
对比例6
本对比例与实施例1基本相同,唯一不同的是反应温度为50℃。在反应温度为50℃时,会有大量原料剩余,硝酸酯化产物的产率为43%。
Claims (6)
3.根据权利要求2所述的方法,其特征在于,醋酸钯的摩尔量为吡啶亚砜亚胺导向的羧酸底物摩尔量的0.1~0.2equiv。
4.根据权利要求2所述的方法,其特征在于,亚硝酸叔丁酯的摩尔量为吡啶亚砜亚胺导向的羧酸底物摩尔量的1~5equiv。
5.根据权利要求2所述的方法,其特征在于,1,4-二氧六环与吡啶亚砜亚胺导向的羧酸底物的体积摩尔比为1:1ml:mmol。
6.根据权利要求2所述的方法,其特征在于,柱层析中采用的洗脱剂为甲醇:二氯甲烷的体积比=0.5:100的混合溶液。
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