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1.
以葡萄糖和哌啶为原料,合成、分离并鉴定了2,3-二氢-3,5-二羟基-6-甲基-4-(H)吡喃-4-酮(1),以空气氛下直接热裂解,SPME吸附热裂解挥发生产物的方式,分析鉴定了20个裂解的挥发性化合物,讨论了热裂解的可能过程。  相似文献   

2.
首先以2-溴-1-(2,3,4-三甲氧基)苯乙酮,四丁基铵-1H-1,2,4-三唑或咪唑为原料,分别合成了2-(1H-1,2,4-三唑-1-基)-1-(2,3,4-三甲氧基)苯乙酮(Ia)和2-(1H-咪唑0-1-基)-1-(2,3,4-三甲氧基)苯乙酮(Ib)与盐酸羟胺反应生成2-(1H-1,2,4-三唑-1-基)-1-(2,3,4-三甲氧基)苯乙酮肟和1-(1H-咪唑-1-基)-1-(2,3,4三甲氧基)苯乙酮肟,产率为63%-72%,并经元素分析,IR和1H NMR进行了表征。  相似文献   

3.
双酚A在不同的ω(HNO3)溶液中硝化可得到不同的产物。在ω(HNO3)=22%的硝酸溶液中硝化,反应温度30℃所得产物为2,2-二(4-羟基-3-硝基苯基)丙烷,在ω(HNO3)=63%的硝酸溶液中硝化,采用三段温度控制法(0℃-30℃-50℃)所得产物为2,2-二(4-羟基-3,5-二硝基苯基)丙烷。产物经柱色谱纯化后,其元素分析、IR,^1H NMR,^13C NMR和MS数据与结构相符。  相似文献   

4.
黄丽莎  曾志  曾和平 《合成化学》2002,10(3):249-250
以2,3-二(溴甲基)喹喔啉为原料,以N-溴琥珀酰亚胺为溴化试剂合成了2-溴甲基-3-(二溴甲基)喹喔啉(1),1是Diels-Alder环加成反应中形成含杂原子环的C60衍生物的一种重要中间体。通过IR,^1H NMR,^13C NMR,DEPT谱和MS对其进行了结构表征。  相似文献   

5.
合成了3种4-酰基-双(1,3-二苯基-5-吡唑啉酮),1,5-双(1′,3′-二苯基-5′-吡唑啉酮-4′-基)-1,5-戊二酮;1,6-双(1′,3′-二苯基-5′-吡唑啉酮-4′-基)-1,6-己二酮和1,10-双(1′,3′-二苯基-5′-吡唑啉酮-4′-基)-1,10-癸二酮,通过元素分析,红外光谱和核磁共振氢谱对产物组成进行了表征,合成了它们的Tb(Ⅲ)二元和三元[1,10-二氮杂菲(Phen)或2,2′-联吡啶(Dipy)]配合物,测定了配合物的荧光光谱,对其荧光性质进行了研究,结果表明,配合物发射Tb(Ⅲ)的特征荧光,4-酰基0双(1,3-二苯基-5-吡唑啉酮)配体的三重态能级与Tb(Ⅲ)的最低激发态(5D4)能级匹配较好,配合物荧光强度随4-酰基-双(1,3-二苯基-5-吡唑啉酮)配体2个吡唑环间碳链的增长而减弱,第2配体Phen和Dipy具有荧光增强作用,且前者优于后者。′  相似文献   

6.
合成了一种新配合物1(R),2(R)-二(2-苯并咪唑)乙二醇四核铜(Ⅱ[Cu4(bbmed)4Cl2L2].Cl2(CH3OH)5(H2O)2(L=MeOH或H2O,Hbbmed=1(R),2(R)-二(2-苯并咪唑)乙二醇,bbmed表示去质子后的配体)简称Cu( Ⅱ)-bbmed)。该晶体经X-射线衍射确定为正交晶系,空间群C221(20),晶胞参数a=1.7424(5),b=2.4942(7),c=3.8887(11)nm,V=16.900(8)nm^3,Z=4,Dc=1.427g.cm^-3,F(000)=7472,并对它进行了元素分析、IR、^1H NMR及ESR表征。  相似文献   

7.
3-(3-吡啶基)-4-氨基-5-芳胺基-1,2,4-三唑的合成与表征   总被引:6,自引:0,他引:6  
张力学  张安将  徐志雄  张自义 《合成化学》2002,10(5):415-418,421
以烟酸与芳胺为基本原料,经多步反应,制得1-烟酰基-4-芳基氨基硫脲;后者在水合肼存在下关环,合成了一系列新化合物3-(3-吡啶基)-4-氨基-5-芳胺基-1,2,4-三唑。化合物结构经元素分析、IR,^1H NMR,^13C NMR确证。  相似文献   

8.
以VD2为原料制备了1α,25-二羟基维生素D3的重要中间体(1S,6R)-1-羟基-6-(1,3-苯并二硫-2-氧)-3,5-环维生素D2。其中BDT(1,3-苯并二硫-2-氧)基团的引入有利于共轭三烯系统的保护。  相似文献   

9.
张玉霞  陈志勇  张海宾  陈世锋 《合成化学》2002,10(3):266-267,270
通过对硝基苯甲酰氯与肼反应合成了对硝基苯甲二酰肼,后者与P2S5缩合反应合成了2,5-二对硝基苯基-1,3,4-噻二唑。研究了合成反应条件,使用吡啶作溶剂,收率76.2%。经元素分析,IR,^1H NMR和MS确证了产物的结构。生物活性初步研究表明,该化合物具有一定的杀菌活性。  相似文献   

10.
2-氯-4-(二氯甲基)-5-羟基-2(H)-呋喃酮(MX)是饮用水氯化消毒过程中产生的一种具有强致突变性的消毒副产物(DBPs),在对MX的前驱物模拟氯化过程中,发现在MX峰的附近有一峰,有时干扰MX的测定;作者对该未知峰的质谱图进行了解析,初步推断其结构可能为2-氯-5-酮-3-烯-己二酰氯(2-chloro-5-oxo-3-hexene diacyl chloride,COHC).  相似文献   

11.
3-(2-Quinolyl)- and 3-(5-carbethoxyfuryl-2)coumarins were prepared by reaction of substituted salicylaldehydes and hetarylacetonitriles. Alkylation and acylation of 3-hetaryl-7-hydroxycoumarins were studied. __________ Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 432–434, September–October, 2005.  相似文献   

12.
3-(2-Pyridyl)coumarins were prepared by reaction of substituted salicylaldehydes and 2-pyridylacetonitrile. Benzylation, acylation, and aminomethylation of 7-hydroxy-3-(2-pyridyl)coumarin was studied. __________ Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 428–431, September–October, 2005.  相似文献   

13.
An efficient synthetic method for the preparation of (E)- and (Z)-3(5)-(2-hydroxyphenyl)-4-styrylpyrazoles has been developed. The reaction of (E)- and (Z)-3-styrylchromones with hydrazine hydrate afforded the corresponding (E)- and (Z)-4-styrylpyrazoles, respectively, saved 4′-nitro-derivatives where both (E)- and (Z)-4′-nitro-3-styrylchromones afforded (E)-3(5)-(2-hydroxyphenyl)-4-(4-nitrostyryl)pyrazoles. The reaction mechanism for these transformations was discussed and the stereochemistry of all products was assigned by NMR experiments.  相似文献   

14.
The crystal structure of the title compound(E)-ethyl 2-(4-(2,4-dimethoxy benzylide-neamino)-5-(3,4,5-trimethoxyphenyl)-4H-1,2,4-triazol-3-ylthio)acetate(4,C24H28N4O7S,Mr = 516.17) was synthesized and determined by X-ray single-crystal diffraction.The crystal belongs to the monoclinic system,space group P21/n with a = 13.162(2),b = 8.4506(13),c = 22.602(4) ,β = 99.888(3)°,μ = 0.183 mm-1,V = 2476.5(7)3,Z = 4,Dc = 1.385 g/cm3,F(000) =1088,T = 110(2) K,R = 0.0426 and wR = 0.1216 for 3859 observed reflections with I > 2σ(Ⅰ).  相似文献   

15.
The reaction of 3-(4-aryl-2-thiazolyl)- and 3-(2-benzothiazolyl)-2-iminocoumarins with N-nucleophiles was studied. This reaction gives 2-N-substituted 3-(4-aryl-2-thiazolyl)- and 3-(2-benzothiazolyl)iminocourmarins. N-Nucleophiles such as arylamines, heterocyclic amines, and hydrazine derivatives undergo this reaction.  相似文献   

16.
Methods were developed for the synthesis of 3-butyl-2-(3-oxobutenyl)benzofurans and 3-(3-furylbenzofuran-2-yl)acrylic acids on the basis of 3-furyl-2-(3-oxobutyl)benzofurans.  相似文献   

17.
An efficient method for the stereoselective synthesis of 3-(diarylmethylene)-2-oxindoles and 3-(arylmethylene)-2-oxindoles via carbopalladation is described. In this approach, an Ugi-4-component reaction (4-CR) adduct was used as the starting material. A one-pot sequence involving intermolecular carbopalladation C-H activation/C-C bond formation efficiently afforded the oxindole derivatives.  相似文献   

18.
3-Chloro-2-polyfluoroalkyl- and 3-chloro-6-nitro-2-polyfluoroalkylchromones were synthesized. These compounds react with N2H4·2HCl on boiling in ethanol to form 4-chloro-3(5)-(2-hydroxyaryl)-5(3)-polyfluoroalkylpyrazoles.  相似文献   

19.
张光辉 《合成化学》2017,25(6):535-538
以(S)-2-氨基丙醇和氯乙酰氯为起始原料,经酰化和环合反应制得(S)-5-甲基吗啉-3-酮(4); 4经还原制得(S)-3-甲基吗啉(5); 5与4-溴-2-甲基苯甲酸酰化缩合合成了(S)-(4-溴2-甲基苯基)(3-甲基吗啉)-甲酮,总收率57%,其结构经1H NMR 和 13C NMR确证。  相似文献   

20.
The synthesis of (S)-2-(3-arylacrylamido)-3-{4-[2-(5-methyl-2-phenyloxazol-4-yl)etho- xy]phenyl}propanoic acids is described. Their structures were confirmed by ^1H-NMR.  相似文献   

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