CN117510430A - 一种噁唑类化合物及其合成方法与应用 - Google Patents
一种噁唑类化合物及其合成方法与应用 Download PDFInfo
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- -1 Oxazole compound Chemical class 0.000 title claims abstract description 78
- 238000010189 synthetic method Methods 0.000 title description 3
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical class CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 claims abstract description 48
- 238000006243 chemical reaction Methods 0.000 claims abstract description 18
- LQZMLBORDGWNPD-UHFFFAOYSA-N N-iodosuccinimide Substances IN1C(=O)CCC1=O LQZMLBORDGWNPD-UHFFFAOYSA-N 0.000 claims abstract description 16
- 125000003118 aryl group Chemical group 0.000 claims abstract description 15
- 238000001308 synthesis method Methods 0.000 claims abstract description 15
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 9
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 8
- 125000000842 isoxazolyl group Chemical group 0.000 claims abstract description 6
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- 238000000034 method Methods 0.000 claims description 8
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- 239000012044 organic layer Substances 0.000 claims description 6
- UEXCJVNBTNXOEH-UHFFFAOYSA-N phenyl acethylene Natural products C#CC1=CC=CC=C1 UEXCJVNBTNXOEH-UHFFFAOYSA-N 0.000 claims description 6
- ITMCEJHCFYSIIV-UHFFFAOYSA-N triflic acid Chemical compound OS(=O)(=O)C(F)(F)F ITMCEJHCFYSIIV-UHFFFAOYSA-N 0.000 claims description 5
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- 238000004440 column chromatography Methods 0.000 claims description 2
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- LMBFAGIMSUYTBN-MPZNNTNKSA-N teixobactin Chemical compound C([C@H](C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](CO)C(=O)N[C@H](CCC(N)=O)C(=O)N[C@H]([C@@H](C)CC)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](CO)C(=O)N[C@H]1C(N[C@@H](C)C(=O)N[C@@H](C[C@@H]2NC(=N)NC2)C(=O)N[C@H](C(=O)O[C@H]1C)[C@@H](C)CC)=O)NC)C1=CC=CC=C1 LMBFAGIMSUYTBN-MPZNNTNKSA-N 0.000 claims 3
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- 229940079593 drug Drugs 0.000 abstract description 3
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- 150000001345 alkine derivatives Chemical class 0.000 abstract 1
- 238000009776 industrial production Methods 0.000 abstract 1
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- 238000005481 NMR spectroscopy Methods 0.000 description 31
- 238000001228 spectrum Methods 0.000 description 23
- 238000005040 ion trap Methods 0.000 description 20
- 238000004009 13C{1H}-NMR spectroscopy Methods 0.000 description 19
- 238000012512 characterization method Methods 0.000 description 11
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 6
- ZCQWOFVYLHDMMC-UHFFFAOYSA-N Oxazole Chemical compound C1=COC=N1 ZCQWOFVYLHDMMC-UHFFFAOYSA-N 0.000 description 6
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- QLQIWRCWPJRJJA-UHFFFAOYSA-N 2-methyl-4,5-diphenyl-1,3-oxazole Chemical compound O1C(C)=NC(C=2C=CC=CC=2)=C1C1=CC=CC=C1 QLQIWRCWPJRJJA-UHFFFAOYSA-N 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 125000003145 oxazol-4-yl group Chemical group O1C=NC(=C1)* 0.000 description 3
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
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- 150000003851 azoles Chemical class 0.000 description 2
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- 125000002971 oxazolyl group Chemical group 0.000 description 2
- 125000004430 oxygen atom Chemical group O* 0.000 description 2
- 125000001037 p-tolyl group Chemical group [H]C1=C([H])C(=C([H])C([H])=C1*)C([H])([H])[H] 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 229910052723 transition metal Inorganic materials 0.000 description 2
- 150000003624 transition metals Chemical class 0.000 description 2
- KWYARAWBLOGQHJ-UHFFFAOYSA-N 2-methyl-4-(4-nitrophenyl)-5-phenyl-1,3-oxazole Chemical class O1C(C)=NC(C=2C=CC(=CC=2)[N+]([O-])=O)=C1C1=CC=CC=C1 KWYARAWBLOGQHJ-UHFFFAOYSA-N 0.000 description 1
- QXAHNLKTEROMSH-UHFFFAOYSA-N 4-(4-methoxyphenyl)-2-methyl-5-phenyl-1,3-oxazole Chemical compound COC1=CC=C(C=C1)C=1N=C(OC1C1=CC=CC=C1)C QXAHNLKTEROMSH-UHFFFAOYSA-N 0.000 description 1
- 125000004800 4-bromophenyl group Chemical group [H]C1=C([H])C(*)=C([H])C([H])=C1Br 0.000 description 1
- 125000001255 4-fluorophenyl group Chemical group [H]C1=C([H])C(*)=C([H])C([H])=C1F 0.000 description 1
- 125000004172 4-methoxyphenyl group Chemical group [H]C1=C([H])C(OC([H])([H])[H])=C([H])C([H])=C1* 0.000 description 1
- BLUKBENFCRVXNS-UHFFFAOYSA-N BrC1=CC=C(C=C1)C=1N=C(OC1C1=CC=CC=C1)C Chemical compound BrC1=CC=C(C=C1)C=1N=C(OC1C1=CC=CC=C1)C BLUKBENFCRVXNS-UHFFFAOYSA-N 0.000 description 1
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 230000003110 anti-inflammatory effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000004071 biological effect Effects 0.000 description 1
- JRXXLCKWQFKACW-UHFFFAOYSA-N biphenylacetylene Chemical group C1=CC=CC=C1C#CC1=CC=CC=C1 JRXXLCKWQFKACW-UHFFFAOYSA-N 0.000 description 1
- 239000007810 chemical reaction solvent Substances 0.000 description 1
- 239000000645 desinfectant Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 150000002391 heterocyclic compounds Chemical class 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 125000004433 nitrogen atom Chemical group N* 0.000 description 1
- 238000000655 nuclear magnetic resonance spectrum Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 125000003854 p-chlorophenyl group Chemical group [H]C1=C([H])C(*)=C([H])C([H])=C1Cl 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D263/00—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings
- C07D263/02—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings not condensed with other rings
- C07D263/30—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
- C07D263/32—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D413/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms
- C07D413/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms containing two hetero rings
- C07D413/04—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms containing two hetero rings directly linked by a ring-member-to-ring-member bond
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)
Abstract
本发明涉及芳基及异噁唑基取代的噁唑类化合物的合成技术领域,具体为一种噁唑类化合物及其合成方法与应用。本发明首次利用N‑碘代丁二酰亚胺(NIS)与双三氟甲烷磺酰亚胺(HNTf2)作为新型的共促进剂,促进炔烃以及C4‑炔基取代的异噁唑类化合物与乙腈发生分子间的反应构建芳基及异噁唑基取代的噁唑类化合物。该反应无需贵重金属催化剂,无需额外的溶剂,反应8h就可以生成目标产物,最高产率可达93%。因此,本发明的合成方法可在环境友好及温和的反应条件下实现目标噁唑类化合物的高效合成,对开发新型药物及工业生产具有重要的意义。
Description
技术领域
本发明涉及有机合成的技术领域,尤其涉及一种噁唑类化合物及其合成方法与应用。
背景技术
噁唑是一种分子结构中含有氮原子和氧原子的五元杂环化合物,通过向噁唑环中引入功能基团,往往能使噁唑类分子表现出良好的抗菌、消炎与杀毒等功效,特别是与生物体内多种酶和受体作用,呈现出广泛的生物活性,进而在医药等领域应用广泛,是新药研制开发的重要领域。
目前关于噁唑类化合物的合成方法中,最多的还是采用过渡金属,例如金、钯和铂等作为催化剂,催化末端炔烃类化合物与腈类化合物发生分子间反应构建此类化合物。然而,这一合成方法所使用的过渡金属往往价格昂贵,不仅不利于反应后的处理,而且还会造成环境污染,不符合当前绿色环保的需求,因此亟需提供一种方案改善上述问题。
发明内容
本发明的目的在于提供一种噁唑类化合物及其合成方法与应用,无需贵金属催化剂和额外的溶剂,能够在友好温和的环境下实现噁唑类化合物的高效合成。
第一方面,本发明提供的一种噁唑类化合物的合成方法,在28-90℃的空气气氛下,在乙腈、促进剂中,乙炔类化合物Ⅰ发生以下反应生成式Ⅱ所示化合物;
;
所述R1为芳基;所述R2为芳基、异噁唑基、噻吩基中的一种;所述促进剂包括双三氟甲烷磺酸亚胺和N-碘代丁二酰亚胺,且所述双三氟甲烷磺酸亚胺和所述N-碘代丁二酰亚胺的摩尔比为0.25-2。
本发明提供的一种噁唑类化合物的合成方法,在乙腈中进行反应,乙腈不但能够作为反应溶剂,还能够作为反应物与乙炔类化合物Ⅰ进行反应,并且在空气气氛下空气中所含的氧气能够参与反应提供氧原子,生成式Ⅱ所示化合物,无需贵金属催化剂和额外的溶剂,能够在友好温和的环境下实现目标产物的高效合成。
可选地,所述乙炔类化合物Ⅰ包括苯乙炔类化合物Ⅲ,所述苯乙炔类化合物Ⅲ的结构式如式Ⅲ所示:
;
所述R3为氢、甲氧基、卤素、甲基、腈基、硝基、三氟甲基中的一种。
可选地,在乙腈、促进剂中乙炔类化合物Ⅰ反应生成式Ⅱ所示化合物时,所述乙炔类化合物Ⅰ与所述促进剂的摩尔比为2:(3-8)。如此,乙炔类化合物Ⅰ与促进剂的摩尔比在这一区间内时,能够从经济效益、反应速率等方面达到良好的平衡。
可选地,在乙腈、促进剂中乙炔类化合物Ⅰ反应生成式Ⅱ所示化合物时,控制反应时长为8-12h。
可选地,在乙腈、促进剂中乙炔类化合物Ⅰ反应生成式Ⅱ所示化合物后,对所述式Ⅱ所示化合物进行分离纯化。
可选地,对所述式Ⅱ所示化合物进行分离纯化时,向反应体系中加入有机溶剂萃取后分离有机层,对所述有机层浓缩后柱层析,收集得纯化后的式Ⅱ所示化合物。
第二方面,本发明提供一种噁唑类化合物,所述噁唑类化合物的结构式如式Ⅳ所示:
;
所述R1为芳基;R4和R5相互独立地为芳基、烷基、烷氧基中的至少一种。
第三方面,本发明提供上述任一可选合成方法所合成的噁唑类化合物在医药合成上的应用。
附图说明
图1为本发明实施例1中制备的噁唑类化合物的核磁共振氢谱图;
图2为本发明实施例1中制备的噁唑类化合物的核磁共振碳谱图;
图3为本发明实施例24中制备的噁唑类化合物的核磁共振氢谱图;
图4为本发明实施例24中制备的噁唑类化合物的核磁共振碳谱图。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚,下面将对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。除非另外定义,此处使用的技术术语或者科学术语应当为本发明所属领域内具有一般技能的人士所理解的通常意义。本文中使用的“包括”等类似的词语意指出现该词前面的元件或者物件涵盖出现在该词后面列举的元件或者物件及其等同,而不排除其他元件或者物件。
本发明实施例提供了一种噁唑类化合物的合成方法,在28-90℃的空气气氛下,在乙腈、促进剂中,乙炔类化合物Ⅰ发生以下反应生成式Ⅱ所示化合物:
;
其中,R1为芳基,R2为芳基、异噁唑基、噻吩基中的一种。
具体的,在乙腈、促进剂中乙炔类化合物Ⅰ反应生成式Ⅱ所示化合物时,所述促进剂包括双三氟甲烷磺酸亚胺和N-碘代丁二酰亚胺。进一步的,双三氟甲烷磺酸亚胺和N-碘代丁二酰亚胺的摩尔比为0.25-2。
一些实施例中,在乙腈、促进剂中乙炔类化合物Ⅰ反应生成式Ⅱ所示化合物时,所述乙炔类化合物Ⅰ与所述促进剂的摩尔比为2:(3-8)。
一些实施例中,在乙腈、促进剂中乙炔类化合物Ⅰ反应生成式Ⅱ所示化合物时,控制反应时长为8-12h。
实际上,乙炔类化合物Ⅰ包括苯乙炔类化合物Ⅲ,所述苯乙炔类化合物Ⅲ的结构式如式Ⅲ所示:
;
所述R3为氢、甲氧基、卤素、甲基、腈基、硝基、三氟甲基中的一种。
具体的,本发明实施例合成的噁唑类化合物的结构式如式Ⅱ所示:
;
其中,R1为芳基,R2为芳基、异噁唑基、噻吩基中的一种。
具体的,噁唑类化合物的结构式还可以如式Ⅳ所示:
;
其中,R4和R5相互独立地为芳基、烷基、烷氧基中的至少一种。
实施例1
本实施例1提供一种噁唑类化合物——2-甲基-4,5-二苯基噁唑的合成方法,包括以下步骤:
S1、将0.2mmol的二苯乙炔溶解在2mL的乙腈后,依次加入0.2mmol的双三氟甲烷磺酸亚胺(HNTf2)和0.1mmol的N-碘代丁二酰亚胺(NIS)搅拌溶解后,在60℃水浴环境、空气气氛中搅拌反应12h;
S2、向反应结束后的混合体系中加入体积为15mL的乙酸乙酯萃取后,分离有机层并对有机层进行真空浓缩,浓缩至体积不再变化的浓缩层,使用乙酸乙酯与石油醚体积比1:15的展开剂,通过薄层色谱硅胶制备板进行分离提纯,制得纯化后呈黄色油状的2-甲基-4,5-二苯基噁唑,计算产率为30%。
具体的,实施例1在合成2-甲基-4,5-二苯基噁唑时的反应式如下所示:
。
实施例2到实施例6
本实施例2到实施例6分别提供一种噁唑类化合物的合成方法,与实施例1的不同之处在于,步骤S1中三氟甲烷磺酸亚胺(HNTf2)和N-碘代丁二酰亚胺(NIS)的添加摩尔量,其具体摩尔量与产物产率如表1所示。
表1 实施例2到实施例6中HNTf2、NIS的添加量与产物产率
。
实施例7
本实施例7提供一种噁唑类化合物的合成方法,与实施例1的不同之处在于,步骤S1中加入0.4mmol的双三氟甲烷磺酸亚胺(HNTf2)和0.2mmol的N-碘代丁二酰亚胺(NIS)搅拌溶解后,在60℃水浴环境中搅拌反应8h,在步骤S2中计算产率为91%。
实施例8
本实施例8提供一种噁唑类化合物的合成方法,与实施例1的不同之处在于,步骤S1中加入0.4mmol的双三氟甲烷磺酸亚胺(HNTf2)和0.2mmol的N-碘代丁二酰亚胺(NIS)搅拌溶解后,在28℃水浴环境中搅拌反应12h,在步骤S2中计算产率为80%。
实施例9
本实施例9提供一种噁唑类化合物的合成方法,与实施例8的不同之处在于,步骤S1中搅拌溶解后,在90℃水浴环境中搅拌反应12h,在步骤S2中计算产率为78%。
实施例10
本实施例10提供一种噁唑类化合物的合成方法,与实施例1的不同之处在于,步骤S1中加入0.4mmol的双三氟甲烷磺酸亚胺(HNTf2)和0.3mmol的N-碘代丁二酰亚胺(NIS)搅拌溶解后,在50℃水浴环境中搅拌反应12h,在步骤S2中计算产率为78%。
实施例11到实施例29
本实施例11到实施例29分别提供一种噁唑类化合物的合成方法,与实施例7的不同之处在于,步骤S1中使用的乙炔类化合物Ⅰ的结构式不同,具体结构式及产物形态、产率如表2所示。
表2 实施例1到实施例29中使用的乙炔类化合物Ⅰ的结构式与产物结构式、形态、产率
,
,
,
,
,
,
对实施例1到实施例10中的噁唑类化合物(2-Methyl-4,5-diphenyloxazole)的波谱表征如下:
1H NMR (500 MHz, CDCl3) δ 7.68–7.62 (m, 2H), 7.61–7.54 (m, 2H), 7.39–7.28 (m, 6H), 2.56 (s, 3H). 13C{1H} NMR (125 MHz, CDCl3) δ 160.4, 145.4,135.3, 132.7, 129.3, 128.8, 128.7, 128.5, 128.2, 128.1, 126.6, 14.2. HRMS(ESI-ion trap) m/z: [M+H]+ calcd for C16H14NO, 236.1075; found, 236.1070.
实施例11中的噁唑类化合物(4-(4-Methoxyphenyl)-2-methyl-5-phenyloxazole)的波谱表征如下所示:
1H NMR (600 MHz, CDCl3) δ 7.67–7.52 (m, 4H), 7.39–7.32 (m, 2H), 7.32–7.26 (m, 1H), 6.96–6.86 (m, 2H), 3.83 (s, 3H), 2.54 (s, 3H). 13C{1H} NMR (150MHz, CDCl3) δ 160.2, 159.6, 144.7, 135.1, 129.4, 129.3, 128.7, 128.2, 126.4,125.1, 114.1, 55.4, 14.1. HRMS (ESI-ion trap) m/z: [M+H]+ calcd for C17H16NO2,266.1181; found, 266.1178.
实施例12中的噁唑类化合物(4-(4-Chlorophenyl)-2-methyl-5-phenyloxazole)的波谱表征如下所示:
1H NMR (600 MHz, CDCl3) δ 7.62–7.58 (m, 2H), 7.48–7.43 (m, 4H), 7.39–7.32 (m, 3H), 2.55 (s, 3H). 13C{1H} NMR (150 MHz, CDCl3) δ 160.7, 144.4,135.9, 132.4, 132.1, 128.8, 128.4, 128.1, 128.0, 127.9, 122.4, 14.1. HRMS(ESI-ion trap) m/z: [M+H]+ calcd for C16H13ClNO, 270.0686; found, 270.0681.
实施例13中的噁唑类化合物(4-(4-Bromophenyl)-2-methyl-5-phenyloxazole)的波谱表征如下所示:
1H NMR (600 MHz, CDCl3) δ 7.60 (m, 2H), 7.50–7.43 (m, 4H), 7.40–7.30(m, 3H), 2.55 (s, 3H). 13C{1H} NMR (150 MHz, CDCl3) δ 160.7, 144.4, 135.9,132.4, 132.1, 128.8, 128.5, 128.2, 128.0, 127.9, 122.5, 14.2. HRMS (ESI-iontrap) m/z: [M+H]+ calcd for C16H13BrNO, 314.0181; found, 314.0174.
实施例14中的噁唑类化合物(2-Methyl-5-phenyl-4-(4-(trifluoromethyl)phenyl)oxazole)的波谱表征如下所示:
1H NMR (600 MHz, CDCl3) δ 7.69 (d, J = 8.2 Hz, 2H), 7.60 (m, 4H),7.42–7.35 (m, 3H), 2.58 (s, 3H). 13C{1H} NMR (150 MHz, CDCl3) δ 161.1, 144.1,137.2, 132.6 (d, J = 1.5 Hz), 132.2, 130.1 (q, J = 33.0 Hz), 128.9, 128.8,128.2, 126.3, 125.8 (q, J = 4.5 Hz), 124.1 (q, J = 271.5 Hz), 14.2. 19F NMR(564 MHz, CDCl3) δ -62.74. HRMS (ESI-ion trap) m/z: [M+H]+ calcd forC17H13F3NO, 304.0949; found, 304.0942.
实施例15中的噁唑类化合物(2-Methyl-4-(4-nitrophenyl)-5-phenyloxazole)的波谱表征如下所示:
1H NMR (600 MHz, CDCl3) δ 8.13–8.09 (m, 2H), 7.70–7.63 (m, 2H), 7.52(m, 2H), 7.37–7.32 (m, 3H), 2.52 (s, 3H). 13C{1H} NMR (150 MHz, CDCl3) δ161.9, 147.1, 143.3, 138.9, 135.2, 131.9, 129.2, 129.1, 128.4, 126.3, 124.3,14.2. HRMS (ESI-ion trap) m/z: [M+H]+ calcd for C16H13N2O3, 281.0926; found,281.0917.
实施例16中的噁唑类化合物(4-(2-Methyl-5-phenyloxazol-4-yl)benzonitrile)的波谱表征如下所示:
1H NMR (600 MHz, CDCl3) δ 7.67 (d, J = 8.5 Hz, 2H), 7.61–7.56 (m, 4H),7.42–7.37 (m, 3H), 2.57 (s, 3H). 13C{1H} NMR (150 MHz, CDCl3) δ 161.5, 143.5,138.2, 133.2, 132.5, 132.1, 129.0, 128.3, 126.2, 118.7, 111.4, 14.1. HRMS(ESI-ion trap) m/z: [M+H]+ calcd for C17H13N2O, 261.1028; found, 261.1023.
实施例17中的噁唑类化合物(4,5-Bis(4-methoxyphenyl)-2-methyloxazole)的波谱表征如下所示:
1H NMR (600 MHz, CDCl3) δ 7.52 (dd, J = 33.9, 8.5 Hz, 4H), 6.88 (dd, J= 8.1, 2.1 Hz, 4H), 3.82 (s, 6H), 2.52 (s, 3H). 13C NMR (150 MHz, CDCl3) δ159.71, 159.42, 144.77, 133.86, 132.05, 129.13, 128.09, 125.32, 122.07,114.26, 114.12, 55.47, 55.43, 14.13. HRMS (ESI-ion trap) m/z: [M+H]+ calcdfor C18H18NO3, 296.1287; found, 296.1280.
实施例18中的噁唑类化合物(4,5-Bis(4-fluorophenyl)-2-methyloxazole)的波谱表征如下所示:
1H NMR (600 MHz, CDCl3) δ 7.60–7.55 (m, 2H), 7.54–7.48 (m, 2H), 7.09–7.02 (m, 4H), 2.53 (s, 3H). 13C{1H} NMR (150 MHz, CDCl3) δ 163.6 (d, J = 10.5Hz), 161.9 (d, J = 9.0 Hz), 160.4, 144.5, 134.3, 129.7 (d, J = 7.5 Hz),128.6, 128.6 (d, J = 7.5 Hz), 125.3 (d, J = 3.0 Hz), 115.9 (q, J = 21.0 Hz),14.1. 19F NMR (564 MHz, CDCl3) δ -112.1, -113.3. HRMS (ESI-ion trap) m/z: [M+H]+ calcd for C16H12F2NO, 272.0887; found, 272.0887.
实施例19中的噁唑类化合物(4,5-Bis(4-chlorophenyl)-2-methyloxazole)的波谱表征如下所示:
1H NMR (600 MHz, CDCl3) δ 7.50–7.44 (m, 2H), 7.42–7.38 (m, 2H), 7.32–7.21 (m, 4H), 2.46 (s, 3H). 13C{1H} NMR (150 MHz, CDCl3) δ 160.8, 144.7,134.7, 134.6, 134.2, 130.9, 129.3, 129.2, 129.1, 127.8, 127.5, 14.1. HRMS(ESI-ion trap) m/z: [M+H]+ calcd for C16H12Cl2NO, 304.0296; found, 304.0288.
实施例20中的噁唑类化合物(4,5-Bis(4-bromophenyl)-2-methyloxazole)的波谱表征如下所示:
1H NMR (600 MHz, CDCl3) δ 7.51–7.46 (m, 6H), 7.41 (d, J = 8.6 Hz, 2H),2.54 (s, 3H). 13C{1H} NMR (150 MHz, CDCl3) δ 160.8, 144.7, 134.8, 132.2,132.1, 131.3, 129.6, 128.1, 127.8, 122.8, 122.5, 14.2. HRMS (ESI-ion trap) m/z: [M+H]+ calcd for C16H12Br2NO, 391.9286; found, 391.9280.
实施例21中的噁唑类化合物(2-Methyl-5-phenyl-4-(o-tolyl)oxazole)的波谱表征如下所示:
1H NMR (600 MHz, CDCl3) δ 7.32–7.28 (m, 2H), 7.25 (m, 2H), 7.21–7.13(m, 5H), 2.50 (s, 3H), 2.11 (s, 3H). 13C{1H} NMR (150 MHz, CDCl3) δ 159.9,145.8, 137.5, 135.1, 132.6, 130.6, 130.4, 129.1, 128.8, 128.7, 127.9, 126.2,124.9, 20.1, 14.2. HRMS (ESI-ion trap) m/z: [M+H]+ calcd for C17H16NO,250.1232; found, 250.1229.
实施例22中的噁唑类化合物(4-(3-Fluorophenyl)-2-methyl-5-phenyloxazole)的波谱表征如下所示:
1H NMR (600 MHz, CDCl3) δ 7.70–7.59 (m, 2H), 7.40–7.33 (m, 4H), 7.29(m, 2H), 7.02–6.96 (m, 1H), 2.56 (s, 3H). 13C{1H} NMR (150 MHz, CDCl3) δ 163.1(d, J = 244.5 Hz), 160.7, 144.2 (d, J = 3.0 Hz), 136.3, 132.3, 131.2 (d, J =7.5 Hz), 130.4 (d, J = 7.5 Hz), 128.5 (t, J = 45.0 Hz), 126.9, 122.1 (d, J =3.0 Hz), 115.4 (d, J = 21.0 Hz), 113.3 (d, J = 24.0 Hz), 14.2. 19F NMR (565MHz, CDCl3) δ -112.3. HRMS (ESI-ion trap) m/z: [M+H]+ calcd for C16H13FNO,254.0981; found, 254.0978.
实施例23中的噁唑类化合物(2-Methyl-5-phenyl-4-(thiophen-2-yl)oxazole)的波谱表征如下所示:
1H NMR (600 MHz, CDCl3) δ 7.70 – 7.66 (m, 2H), 7.42 – 7.38 (m, 2H),7.35 (m, 2H), 7.30 (dd, J = 5.1, 1.0 Hz, 1H), 7.02 (dd, J = 5.0, 3.7 Hz, 1H),2.54 (s, 3H). 13C{1H} NMR (150 MHz, CDCl3) δ 160.5, 145.1, 134.8, 130.0,129.5, 128.9, 128.8, 127.6, 126.9, 125.8, 125.3, 14.1. HRMS (ESI-ion trap) m/z: [M+H]+ calcd for C14H12NOS, 242.0640; found, 242.0635.
实施例24中的噁唑类化合物(4-(2-Methyl-5-(p-tolyl)oxazol-4-yl)-3,5-diphenylisoxazole)的波谱表征如下所示:
1H NMR (600 MHz, CDCl3) δ 7.62 (dd, J = 7.7, 1.8 Hz, 2H), 7.48 (dd, J= 8.2, 1.2 Hz, 2H), 7.28–7.18 (m, 8H), 6.94 (d, J = 8.1 Hz, 2H), 2.52 (s,3H), 2.18 (s, 3H). 13C{1H} NMR (150 MHz, CDCl3) δ 168.1, 163.1, 160.7, 149.1,138.7, 130.5, 129.8, 129.6, 128.9, 128.7, 128.1, 127.6, 126.9, 125.1, 124.8,123.8, 106.7, 21.4, 14.4. HRMS (ESI-ion trap) m/z: [M+H]+ calcd for C26H21N2O2,393.1603; found, 393.1601.
实施例25中的噁唑类化合物(4-(2-Methyl-5-(p-tolyl)oxazol-4-yl)-5-pentyl-3-phenylisoxazole)的波谱表征如下所示:
1H NMR (600 MHz, CDCl3) δ 7.65 – 7.58 (m, 2H), 7.34 – 7.26 (m, 5H),7.07 (d, J = 8.0 Hz, 2H), 2.61–2.57 (m, 2H), 2.55 (s, 3H), 2.30 (s, 3H),1.60–1.54 (m, 2H), 1.18 (m, 4H), 0.81–0.73 (m, 3H). 13C{1H} NMR (150 MHz,CDCl3) δ 173.1, 161.8, 160.4, 148.5, 138.5, 129.7, 129.6, 129.2, 128.6,128.1, 125.2, 125.0, 124.0, 107.3, 31.4, 26.7, 26.2, 22.3, 21.4, 14.3, 13.9.HRMS (ESI-ion trap) m/z: [M+H]+ calcd for C25H27N2O2, 387.2073; found,387.2058.
实施例26中的噁唑类化合物(3-(tert-Butyl)-4-(2-methyl-5-phenyloxazol-4-yl)-5-phenylisoxazole)的波谱表征如下所示:
1H NMR (600 MHz, CDCl3) δ 7.48–7.42 (m, 2H), 7.34–7.28 (m, 2H), 7.24–7.10 (m, 6H), 2.54 (s, 3H), 1.19 (s, 9H). 13C{1H} NMR (150 MHz, CDCl3) δ170.8, 167.9, 160.6, 148.2, 130.1, 128.9, 128.8, 128.5, 127.9, 127.8, 126.7,125.6, 124.8, 106.3, 33.6, 29.1, 14.3. HRMS (ESI-ion trap) m/z: [M+H]+ calcdfor C23H23N2O2, 359.1760; found, 359.1751.
实施例27中的噁唑类化合物(5-(tert-Butyl)-4-(2-methyl-5-(p-tolyl)oxazol-4-yl)-3-phenylisoxazole)的波谱表征如下所示:
1H NMR (600 MHz, CDCl3) δ 7.45–7.39 (m, 2H), 7.22–7.15 (m, 5H), 6.99(d, J = 8.1 Hz, 2H), 2.48 (s, 3H), 2.21 (s, 3H), 1.18 (s, 9H). 13C{1H} NMR(150 MHz, CDCl3) δ 178.4, 162.8, 159.9, 148.6, 138.5, 129.6, 129.5, 129.3,128.6, 128.1, 125.3, 124.8, 124.6, 105.5, 34.4, 28.8, 21.4, 14.2. HRMS (ESI-ion trap) m/z: [M+H]+ calcd for C24H25N2O2, 373.1916; found, 373.1907.
实施例28中的噁唑类化合物(5-Cyclopropyl-4-(2-methyl-5-(p-tolyl)oxazol-4-yl)-3-phenylisoxazole)的波谱表征如下所示:
1H NMR (600 MHz, CDCl3) δ 7.57–7.46 (m, 2H), 7.28 (d, J = 8.3 Hz, 2H),7.20 m, 3H), 7.00 (d, J = 8.0 Hz, 2H), 2.45 (s, 3H), 2.22 (s, 3H), 1.74 (m,1H), 1.11–0.97 (m, 2H), 0.87–0.72 (m, 2H). 13C{1H} NMR (151 MHz, CDCl3) δ172.9, 161.9, 160.3, 148.4, 138.4, 129.6, 129.5, 129.2, 128.6, 128.1, 125.3,124.9, 123.8, 106.6, 21.4, 14.2, 8.3, 8.2. HRMS (ESI-ion trap) m/z: [M+H]+calcd for C23H21N2O2, 357.1603; found, 357.1600.
实施例29中的噁唑类化合物(5-(tert-Butyl)-4-(2-methyl-5-(p-tolyl)oxazol-4-yl)-3-(4-(trifluoromethyl)phenyl)isoxazole)的波谱表征如下所示:
1H NMR (600 MHz, CDCl3) δ 7.60 (d, J = 8.2 Hz, 2H), 7.51 (d, J = 8.3Hz, 2H), 7.23 (d, J = 8.3 Hz, 2H), 7.07 (d, J = 8.1 Hz, 2H), 2.57 (s, 3H),2.30 (s, 3H), 1.28 (s, 9H). 13C{1H} NMR (150 MHz, CDCl3) δ 179.1, 161.7,160.2, 148.8, 138.7, 129.7, 128.4, 125.6 (q, J = 4.5 Hz), 125.1, 124.7,124.1, 105.7, 34.6, 28.8, 21.5, 14.3. HRMS (ESI-ion trap) m/z: [M+H]+ calcdfor C25H24F3N2O2, 441.1790; found, 441.1790.
图1所示为实施例1到实施例10合成的噁唑类化合物的核磁共振氢谱谱图,从谱图中可以看出总共有13个氢,其中甲基上3个氢的化学位移为2.56ppm,两个苯环中的10个氢的化学位移位于7ppm-8ppm之间。
图2所示为实施例1到实施例10合成的噁唑类化合物的核磁共振碳谱谱图,从谱图中可以看出总共出现了12组碳峰,这与表2中的结构完全吻合。
图3所示为实施例24合成的噁唑类化合物的核磁共振氢谱谱图,从谱图中可以看出总共有20个氢,化学位移为2.52ppm的3个氢是与噁唑环相连的甲基上的3个氢,化学位移为2.18ppm的3个氢是与苯环相连的甲基上的3个氢,化学位移处于6ppm-8ppm之间的14个氢为3个苯环上的氢。图4所示为实施例24合成的噁唑类化合物的核磁共振碳谱谱图,从谱图中可以看出总共出现了15组碳峰,这与表2中的结构同样完全吻合。
虽然在上文中详细说明了本发明的实施方式,但是对于本领域的技术人员来说显而易见的是,能够对这些实施方式进行各种修改和变化。但是,应理解,这种修改和变化都属于权利要求书中所述的本发明的范围和精神之内。而且,在此说明的本发明可有其它的实施方式,并且可通过多种方式实施或实现。
Claims (8)
1.一种噁唑类化合物的合成方法,其特征在于,在28-90℃的空气气氛下,在乙腈、促进剂中,乙炔类化合物Ⅰ发生以下反应生成式Ⅱ所示化合物;
;
所述R1为芳基,所述R2为芳基、异噁唑基、噻吩基中的一种;所述促进剂包括双三氟甲烷磺酸亚胺和N-碘代丁二酰亚胺,且所述双三氟甲烷磺酸亚胺和所述N-碘代丁二酰亚胺的摩尔比为0.25-2。
2.根据权利要求1所述的合成方法,其特征在于,所述乙炔类化合物Ⅰ包括苯乙炔类化合物Ⅲ,所述苯乙炔类化合物Ⅲ的结构式如式Ⅲ所示:
;
所述R3为氢、甲氧基、卤素、甲基、腈基、硝基、三氟甲基中的一种。
3.根据权利要求1所述的合成方法,其特征在于,在乙腈、促进剂中乙炔类化合物Ⅰ反应生成式Ⅱ所示化合物时,所述乙炔类化合物Ⅰ与所述促进剂的摩尔比为2:(3-8)。
4.根据权利要求1所述的合成方法,其特征在于,在乙腈、促进剂中乙炔类化合物Ⅰ反应生成式Ⅱ所示化合物时,控制反应时长为8-12h。
5.根据权利要求1所述的合成方法,其特征在于,在乙腈、促进剂中乙炔类化合物Ⅰ反应生成式Ⅱ所示化合物后,对所述式Ⅱ所示化合物进行分离纯化。
6.根据权利要求5所述的合成方法,其特征在于,对所述式Ⅱ所示化合物进行分离纯化时,向反应体系中加入有机溶剂萃取后分离有机层,对所述有机层浓缩后柱层析,收集得纯化后的式Ⅱ所示化合物。
7.一种噁唑类化合物,其特征在于,所述噁唑类化合物的结构式如式Ⅳ所示:
;
所述R1为芳基;R4和R5相互独立地为芳基、烷基、烷氧基中的至少一种。
8.一种如权利要求1至6任一项所述合成方法所合成的噁唑类化合物在医药合成上的应用。
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