共查询到19条相似文献,搜索用时 265 毫秒
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N-三甲硅甲基苯甲醛亚胺为非稳定型亚甲胺基叶立德前体,在磷酸催化下与取代噁唑烷酮烯烃经1,3-偶极环加成反应合成了10个具有cis-trans立体结构的新型2,3,4-三取代四氢吡咯-3-羧酸衍生物(3a~3j),收率65%~75%,其结构经1H NMR, 13C NMR和HR-MS表征。3b的立体结构经X-单晶衍射确证。 相似文献
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以醋酸为催化剂,DMF为溶剂,取代-2-氯喹啉-3-甲醛和5,5-二甲基-1,3-环己二酮于80 ℃~100 ℃反应2.5 h~4.0 h,合成了5个新型的含2-喹诺酮基的氧杂蒽二酮衍生物,收率78%~90%,其结构经1H NMR, IR, HR-ESI-MS和元素分析表征。3,3,6,6-四甲基-9-{3-[7-甲基喹啉基-2(1H)酮]}-2,4,5,7,9,10-六氢化氧杂蒽-1,8(2H,5H)二酮(3b)经X-射线单晶衍射表征。 3b(CCDC: 971 833)属单斜晶系,空间群C12/C1,晶胞参数a=1.411 90(16)nm, b=2.231 4(2)nm, c=1.618 28(18)nm, β=106.904°, V=4.878 1(9) nm3, Dc=1.175 g·cm-3, Z=1, R1=0.044 4, wR2=0.074 6。 相似文献
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在超声波辐射下, 芳香醛、1,3-环己二酮和2-氨基苯并咪唑3组分在离子液体([bmim]Br)介质中经Biginelli反应“一锅煮”合成了一系列新型苯并咪唑并[2,1-b]喹啉-6-酮衍生物. 2-氨基苯并咪唑的使用是对经典的Biginelli反应的发展, 并且该方法具有反应条件温和、产率较高(65%~86%)及环境友好等优点. 产物经IR, 1H NMR和元素分析确证了结构. 相似文献
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无溶剂氧化亚锡催化合成2-[(3-吲哚基)-甲基]丙二酸二甲酯衍生物 总被引:1,自引:1,他引:0
在氧化亚锡催化下,吲哚、醛和丙二酸二甲酯在无溶剂条件下三组分反应合成了10种2-[(3-吲哚基)-甲基]丙二酸二甲酯衍生物。 反应无溶剂污染,反应条件温和,收率为58%~74%。 讨论了反应速度与取代基的关系,探讨了可能的缩合反应机理,并应用1H NMR、13C NMR、IR等技术手段确定了产品的结构。 相似文献
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报道了水相中硫酸氢钠催化的乙酰乙酸酯、醛和脲(硫脲)参与的Biginelli型反应,在超声波促进下高效地合成11个3,4-二氢嘧啶酮衍生物,收率80%~93%,其结构经1H NMR和HR-MS确证。 相似文献
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An easy and efficient method for the synthesis of multisubstituted cyclopropane derivatives from electron-deficicent alkenes with 2-bromo-1,3-propanedione compounds was described. For this method, ethyl α-cyanocinnamate derivatives 1 and β,β-dicyanostyrene derivatives 4 can all smoothly react with 2-bromo-1,3-propanedione compounds 2 to afford the corresponding multisubstituted cyclopropane derivatives 3 and 5 in good to excellent yields(up to 100%) promoted by anhydrous K3PO4 in DMF at room temperature, respectively. A possible mechanism of this reaction was proposed. Structures of all the products were confirmed by 1H NMR, 13C NMR and HRMS. 相似文献
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An unusual cyclodimerization reaction of the 1-methyl-1,3-diferrocenylallyl cation into 1,3,5-triferrocenyl-4-(1-ferrocenylethenyl)cyclohexene has been studied. Two isomeric compounds were isolated and their structures were established as 1,r3,c5-triferrocenyl-4-t-(1-ferrocenylethenyl)cyclohexene and 1,r3, t5-triferrocenyl-4-c-(1-ferrocenylethenyl)cyclohexene on the basis of 1H NMR and 13C NMR spectral data. 相似文献
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ZHU Hongwei WANG Baolei ZHANG Xiulan XIONG Lixia YU Shujing LI Zhengming 《高等学校化学研究》2014,30(3):409-414
A series of novel 3-bromo-1-(3-chloropyridin-2-yl)-N-hydroxy-N-aryl-lH-pyrazole-5-carboxamides was synthesized by the reaction of pyrazole carbonyl chloride with each of substituted phenylhydroxyamines. The latter ones were prepared in good yields by reducing substituted nitrobenzene compounds with Zn/NH4CI reductant system in alcohol. Structures of the title compounds were determined by IR, 1H NMR, and HRMS. Their insecticidal and fungicidal activities were evaluated by larvicidal test against oriental armyworm and the mycelium growth rate method, respectively. 相似文献