微波辐射无溶剂条件下快速合成2,4,6-三芳基吡啶四氟硼酸盐

在微波辐射无溶剂条件下快速、高产率地合成了2,4,6-三芳基吡啶四氟硼酸盐化合物, 并对其进行核磁共振、红外光谱、元素分析表征. 同时得到了化合物4f的晶体, 对其进行了X单晶射线衍射表征. 结果表明, 该晶体属正交晶系, 空间群Pbca, a＝2.1050(2) nm, b＝1.64360(17) nm, c＝2.9209(3) nm, α＝β＝90.00°, γ＝90.00°, D_c＝1.276 g•cm^－3, V＝10.1057(17) nm^－3, Z＝16.     

微波促进下9-芳基氢化吖啶-1,8-二酮的合成研究

本文研究了微波促进下芳香醛、5,5-二甲基-1,3-环己二酮与碳酸氢铵的三组分无溶剂缩合反应,并通过该反应合成了一系列9-芳基氢化吖啶-1,8-二酮类化合物.这一合成方法具有操作简便、反应条件温和、产率高、对环境友好等特点.     

微波促进下4-芳基亚氨基-1,2,4-三唑的合成

无溶剂;无催化剂;微波辐射;取代基-巯基-芳基亚氨基三唑     

无溶剂条件下5,6-二取代-2,3-吡啶二酮的合成

在无溶剂条件下, 由3-羟基-2(1H)-吡啶酮与取代苯胺在NaIO₃作用下合成了一系列5,6-二取代-2,3-吡啶二酮, 产物结构由元素分析, ¹H NMR, MS, IR得到确认. 该方法具有反应条件温和、操作简单和产率高等优点.     

微波辐射法合成2-(4-取代苯乙烯基)苯并噻唑

甲基苯并噻唑;芳香醛;微波辐射法合成2-(4-取代苯乙烯基)苯并噻唑     

2-苯乙烯基喹啉染料的无溶剂微波合成

在微波促进无溶剂条件下,由2-甲基喹啉与取代芳香醛在醋酐作用下合成了一系列2-苯乙烯基喹啉染料,该法操作简便、收率高.经元素分析, 1H NMR, MS, IR和UV确证了产物的结构.     

2,6-二溴-4-氨基吡啶的合成

从时间分辨荧光免疫分析双功能螯合剂合成需要出发,设计了2,6-二溴-4-氨基吡啶的合成路线.以2,6-二溴吡啶为起始原料,经过氧化、硝化和还原三步合成了该化合物,通过红外光谱、元素分析和熔点测定对其进行了表征.证明了该结构和合成方法的可靠性,并分别探讨了各步产物合成反应条件的影响,具有一定的参考价值.     

微波辐射下一步合成4-芳基-2,6-二(3,3’-香豆素基)吡啶衍生物

3-乙酰基香豆素、芳醛和醋酸铵在醋酸溶剂中经微波辐射,一步合成了4-芳基-2,6-二(3,3’-香豆素基)吡啶衍生物,反应在5～8 min内完成,产率60%～86%,具有反应时间短、操作简便和环境友好等优点.所以产物经红外光谱、氢谱、质谱和元素分析表征.     

微波促进无溶剂无催化条件下2,4,5-三芳基取代咪唑衍生物的合成

咪唑及其衍生物具有广泛的生理活性,作为许多天然酶的活性中心功能基,它们参与了一系列重要的生物化学反应[1,2],被誉为“生物配体”或“生物催化剂”。近年来,人们发现咪唑及其衍生物也是一类重要的有机功能材料,它在制药、化学发光、有机光电等领域有着广泛的应用[3,4]。利用     

4-甲酰基4-苯乙烯基吡啶分子聚集行为的光谱研究

苯乙烯基吡啶化合物,由于它可能在医学方面^[1]和光电子功能材料^[2]方面有实际应用前景,已引起人们的兴趣。苯乙烯吡啶化合物的光化学性质类似于二苯乙烯化合物,在光照下可以发生顺-反异构反应^[3]、加成反应和二聚反应^[4]等不同的光化学反应。     

一种以水相中微波促进下的多组分反应合成具有重要生物意义的茚并[2,1-e]吡唑并[5,4-b]吡啶的绿色方法

在无催化剂的条件下,以醛、3-甲基-1-苯基-1H-吡唑-5-胺和1,3-茚二酮为原料,通过水相中微波促进下的多组分反应,成功地实现了具有重要生物意义的茚并[2,1-e]吡唑并[5,4-b]吡啶的绿色合成。这种方法具有环境友好、反应时间短、产率高、价廉、操作简单以及广泛的适用范围等显著优点。     

微波辐射下吡啶[2,3-d]嘧啶衍生物的高效合成

本文以等摩尔的芳醛,巴比妥酸（或1,3-二甲基巴比妥酸）,5-氨基-2-甲基苯[d]噻唑为原料,以醋酸和乙二醇为溶剂,微波辐射下多组分一锅法合成了一系列新的吡啶[2,3-d]嘧啶衍生物。这种方法具有产率高,操作简便,反应时间短等优点。     

Facile Synthesis of 3‐Substituted Isoquinolines Derivatives via Microwave‐assisted Tandem Three‐component Coupling Cyclization

A novel three‐component reaction of o‐bromobenzaldehyde, terminal alkynes and tert‐butyl amine has been established, which proceeded smoothly to give 3‐substituted isoquinolines in good yields in the presence of palladium/copper catalysts under microwave irradiation.     

无溶剂条件下碘催化合成三吲哚甲烷的研究

室温无溶剂条件下,碘(5 mol%)催化吲哚与原甲酸三乙酯的反应,生成相应的三吲哚甲烷,产率适中到较好且无副产物。     

溴化镁催化的1,2,3,4-四氢吡啶酮无溶剂合成研究

An efficient and environmentally friendly procedure for the one-pot synthesis of tetrahydropyrimidinones from aldehydes, β-diketones and urea/thiourea by using magnesium bromide as an inexpensive and easily available catalyst under solvent-free conditions was described. Compared with the classical Biginelli reaction conditions, this new method has the advantage of good to excellent yields (74%-94%) and short reaction time (45-90 min). The structure of the Biginelli reaction product from β-diketone, salicylaldehyde and urea has been proposed to possess an oxygen-bridge by cyclization (intramolecular Michael-addition).     

Solvent‐free Synthesis of Hexagonal Iron Sulfide Nanoflowers

Employing green and economic solvent‐free synthesis route, hexagonal iron sulfide (Fe₇S₈) nanoflowers were successfully synthesized for the first time. In the experiment, ferric hexadecylxanthate was used as the precursor, and hexagonal iron sulfide (Fe₇S₈) nanoflowers were obtained by thermal decomposition of the precursor at 260°C without any additional solvent or inert gas protection. The as‐prepared iron sulfide nanoflowers were characterized by means of X‐ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM) and energy dispersive spectrometry (EDS). The characterization results indicated that the nanoflowers had uniform size distribution with an average size of about 160 nm. The proposed strategy provides a possible general route for the synthesis of other metal chalcogenide nanostructures.     

L-Proline Catalyzed Enamination of β-Dicarbonyl Compounds under Solvent-free Conditions

A simple, general and efficient method has been developed for synthesis of various β-enamino ketones and esters by reacting β-dicarbonyl compounds with amines using a catalytic amount of L-proline at room temperature under solvent-free conditions in excellent yields.     

One‐pot Green Procedure for Synthesis of Tetrahydrobenzo[a]xanthene‐11‐one Catalyzed by Brønsted Ionic Liquids under Solvent‐free Conditions

An efficient one‐pot condensation of β‐naphthol, aldehydes and cyclic 1,3‐dicarbonyl compound has been achieved with ionic liquids as catalyst, thus a variety of 8,9,10,12‐tetrahydrobenzo[a]xanthen‐11‐one derivatives were prepared in good yields. The present approach offers several advantages such as shorter reaction times, good yields and mild reaction conditions.     

N-Bromosuccinimide Catalyzed One-pot and Rapid Synthesis of Acetamidobenzyl Naphthols under Mild and Solvent-free Conditions

An efficient, facile and expeditious direct protocol for the preparation of acetamidobenzyl naphthols employing a multi-component and one-pot condensation reaction of 2-naphthol, benzaldehydes, and acetamide in the presence of N-bromosuccinimide (NBS) under thermal and microwave irradiation conditions has been described. The present protocol with NBS catalyst is convincingly superior to the recently reported catalytic methods.