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氮杂Wittig反应是杂环化合物的一个新的合成方法.本文阐述了羰基通过叠氮化物和三价膦形成的亚胺基膦的作用, 以氮杂Wittig反应的方式, 合成含氮杂环化合物的进展. 相似文献
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利用多组分反应合成结构复杂多样的杂环化合物,在有机合成领域具有广阔的应用前景和研究价值.本文综述了近年来多组分反应在五元杂环、六元杂环、多元杂环合成中的研究进展,同时对杂环化合物的绿色合成方法做出展望. 相似文献
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综述了近几年来利用靛红代替芳香醛参与多组分反应,并合成相关螺杂环化合物的最新研究进展,同时还对其发展方向加以展望. 相似文献
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概括了环链转移反应的类型、机理,同时综述了环链转移反应在合成取代杂环化合物中的应用。 相似文献
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Pd-N-杂环卡宾化合物催化的Heck反应、Suzuki反应进展 总被引:1,自引:0,他引:1
Pd催化的C—C键偶联反应是形成碳—碳单键的重要反应之一.传统上,使用膦化合物为配体来调整催化活性及选择性.但大多数Pd-膦化合物对空气稳定性差,容易被氧化;在溶液中易于解离出膦配体而降低催化剂稳定性,通常需要给反应体系中加入较多的膦配体以保持催化剂的稳定性和活性.1991年发现的稳定N-杂环卡宾(NHC)类配体具有富含电子、给电子能力强,对金属配位能力强,结构易修饰等特点,使得金属-NHC化合物成为金属有机化学、催化等领域研究新的焦点.Pd-NHC化合物已经可催化多类有机反应,是继传统Pd-膦催化剂外的又一类高效催化剂.综述了近年来不同结构的NHC如单齿简单NHC、双齿NHC、含其它配位原子的NHC等配体与Pd的配合物在Heck反应、Suzuki反应等偶联反应中的应用. 相似文献
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含氮杂环及其衍生物的氮氧化方法研究进展 总被引:1,自引:0,他引:1
含氮杂环及其衍生物中的N-氧化反应是合成许多精细化工产品,如日用化学 品、医药、农药的重要反应,但该反应选择性较高,只要求在杂环氮上进行氧化而 不影响分子其它部位,从氮杂环及其衍生物应用不同氧化剂选择性氧化综述了该类 化合物的N-氧化反应。 相似文献
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Because of its various biological activities, isatin plays important roles in organic chemistry. The C-3 carbonyl group of the isatin possesses very high reactivity and thus isatin possesses many diverse applications in organic synthesis. This carbonyl group reacts like a prochiral center. For the organic synthetic chemist, the conception of a spiroheterocyclic building block has always been interesting, as it often requires synthetic design based on specific strategies. This review summarizes the synthesis of various multispiro heterocyclic compounds by using isatin through 1,3-dipolar cycloaddition reactions and multicomponent reactions. 相似文献
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报道了一个简单、 高选择性合成烯基化芳香杂环化合物的反应体系. 在钯的催化作用下, 以乙酸/乙酸酐或四氢呋喃为溶剂, 芳香杂环化合物与烯基化试剂进行交叉脱氢偶联, 合成了系列具有潜在光学活性的烯基化芳香杂环化合物, 确定了最佳反应条件. 采用紫外光谱、 核磁共振氢谱和X射线单晶衍射对目标化合物进行了表征, 并对反应机理进行了探讨. 相似文献
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T. K. Venkatachalam 《合成通讯》2013,43(20):3667-3675
Heterocyclic thioureas having multiple substitutions were prepared in two steps with overall yields of 60–80%. Condensation of a substituted heterocyclic amine with thiocarbonyldiimidazole, followed by treatment with a disubstituted phenylethylamine in dimethyl formamide (DMF), yielded the desired heterocyclic thioureas as crystalline solids. 相似文献
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YANG Gao-Shan LIU Chong-Bo LI Heng-Nong CHEN Yuan HUANG De-He WEN Hui-Liang 《结构化学》2014,33(4):528-534
Two heterocyclic Schiff bases were synthesized via the condensation reactions of primary amines with carbonyl compounds. 2-[(4-pyridylmethylene)-amino] phenol(compound 1) was synthesized by the interaction of 4-pyridinecarboxaldehyde with o-aminophenol in ethanol solvent; N,N‘-bis(3-(furan-2-yl)allylidene)benzene-1,4-diamin(compound 2) was synthesized by the interaction of 3-(2-furyl)acrolein with p-phenylenediamine in ethanol medium. The compounds were characterized by elemental analysis, IR, MS and single-crystal X-ray diffraction. Compound 1(C12H10N2O) crystallizes in the monoclinic system, space group P21/c with a = 7.0771(7), b = 7.2820(7), c = 19.849(2),β= 96.3390(10)°, V = 1016.66(17) ?3, Z = 4, Mr = 198.22, Dc = 1.295 g/cm3, F(000) = 416, GOOF = 1.060, μ= 0.085 mm-1, the final R = 0.0371 and wR = 0.0929 for 1497 observed reflections with I 2σ(I). Compound 2(C20H16N2O2) crystallizes in the orthorhombic system, space group Fdd2 with a = 26.344(15), b = 48.50(3), c = 5.293(3), V = 6764(7) ?3, Z = 16, Mr = 316.35, Dc = 1.243 g/cm3, F(000) = 2656, GOOF = 1.043, = 0.081 mm-1, the final R = 0.0526 and wR = 0.1267 for 2059 observed reflections with I 2σ(I). 1 and 2 molecules are connected through hydrogen bonds to generate a 2D network and a 1D chain structure, respectively. The preliminary antibacterial activity results showed that the title compounds display excellent antibacterial activities to Escherichia coli, Staphylococcus aureus and Bacillus subtilis. 相似文献