共查询到19条相似文献,搜索用时 93 毫秒
1.
通过7-芳亚甲基-6,7-二氢中氮茚-8(5H)-酮与甲亚胺叶立德(经苊醌或靛红与肌氨酸反应原位生成)进行的l,3-偶极环加成反应,合成了具有良好产率的新的1’-甲基-4’-芳基-5",6"-二氢-2H,8"H-二螺[苊烯-1,2’-吡咯烷-3’,7"-中氮茚]-2,8"-二酮类化合物和1’-甲基-4’-芳基-5",6"-二氢-1H,8"H-二螺[吲哚-3,2’-吡咯烷-3’,7"-中氮茚]-2,8"-二酮类化合物.采用NMR,IR,质谱,元素分析以及X射线单晶衍射等多种谱学技术对产物进行了结构表征. 相似文献
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许多螺杂环化合物及喹唑啉化合物具有抗癌、消炎、抗真菌、抗细菌、抗结核、抗肿瘤以及除草等生物活性,将噻唑酮和喹唑啉稠合环结构与螺杂环结构合为一体,合成新的喹唑啉稠合螺杂环化合物,以期得到具有更高生物活性的化合物,是当前化学家研究的课题之一,1,3-偶极环加成反应是合成五元杂环的常用方法,采用环外双键结构的化合物为亲偶极体, 相似文献
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以取代靛红和肌氨酸为原料制得1,3-偶极子,再与(E)-芳姜烯酮类化合物在乙腈中经3+2环加成反应合成了10个新型的芳姜黄酮拼合吡咯螺环氧化吲哚类化合物(3a~3j)产率70%~91%, d/r值15 :1~>20:1,其结构经1H NMR, 13C NMR和HR-MS(ESI-TOF)表征。采用MTT法研究了3a~3j对人肺癌细胞(A549)和人白血病细胞(K562)的体外抗肿瘤活性。结果表明:3f对K562抑制活性较好(IC50=31.1 μmol·L-1), 3b对A549抑制活性较好(IC50=54.1 μmol·L-1)。 相似文献
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采用3-(4-三氟甲基苯亚甲基)吲哚啉-2-酮和2-(4-三氟甲基苯亚甲基)-1H-茚-1,3(2H)-二酮分别与鉮盐在二氯甲烷中,碳酸钾或氟化钾存在下反应,可高产率、高立体选择性地得到以反式构型为主的含三氟甲基的3'-螺环丙基取代的氧化吲哚和2'-螺环丙基取代的茚二酮衍生物.产物相对构型经X射线单晶衍射或1H-1H NOESY谱确定.还从反应机理的角度对产物构型做了解释. 相似文献
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以3-异硫氰氧化吲哚(1)与3-烯氧化吲哚(2),经济易得的有机奎宁作为有机催化剂,在二氯甲烷溶剂中发生Michael加成环化反应,合成了12个未见文献报道的3,3′-吡咯双螺环氧化吲哚类化合物3a^3l,产率81%~92%,ee值86%~>99%,dr值7/1~>20/1,其结构经1H NMR,13C NMR和HR-MS(ESI-TOF)表征。通过培养3c(CCDC:1961579)和3j(CCDC:1961580)单晶,确定其绝对构型为(2′R,3′S,4′R)。 相似文献
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以硝基异噁唑苯乙烯与靛红衍生的三氟甲基亚胺为原料,在有机碱三乙胺的催化作用下,发生Michael加成环化反应,得到了12个未见文献报道的异噁唑-三氟甲基螺环氧化吲哚类化合物3a~3l,产率73%~89%,dr值10/1~>20/1, 其结构经1H NMR, 13C NMR和HR-MS(ESI-TOF)表征,通过单晶进一步进行了确定化合物3e的相对构型。该类化合物含有连续4个立体中心,其中包含一个螺环季碳中心。采用MTT法研究了3a~3l对人白血病细胞(K562)的体外抗肿瘤活性。结果表明:化合物3c,3d,3h和3i对K562具有一定的抑制活性, 说明异噁唑-三氟甲基螺环氧化吲哚骨架可以作为抗肿瘤先导化合物进一步研究。 相似文献
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Mezna Saleh Altowyan Saied M. Soliman Matti Haukka Nora Hamad Al-Shaalan Aminah A. Alkharboush Assem Barakat 《Molecules (Basel, Switzerland)》2022,27(13)
In the present work, a novel heterocyclic hybrid of a spirooxindole system was synthesized via the attachment of ferrocene and triazole motifs into an azomethine ylide by [3 + 2] cycloaddition reaction protocol. The X-ray structure of the heterocyclic hybrid (1″R,2″S,3R)-2″-(1-(3-chloro-4-fluorophenyl)-5-methyl-1H-1,2,3-triazole-4-carbonyl)-5-methyl-1″-(ferrocin-2-yl)-1″,2″,5″,6″,7″,7a″-hexahydrospiro[indoline-3,3″-pyrrolizin]-2-one revealed very well the expected structure, by using different analytical tools (FTIR and NMR spectroscopy). It crystallized in the triclinic-crystal system and the P-1-space group. The unit cell parameters are a = 9.1442(2) Å, b = 12.0872(3) Å, c = 14.1223(4) Å, α = 102.1700(10)°, β = 97.4190(10)°, γ = 99.1600(10)°, and V = 1484.81(7) Å3. There are two molecules per unit cell and one formula unit per asymmetric unit. Hirshfeld analysis was used to study the molecular packing of the heterocyclic hybrid. H···H (50.8%), H···C (14.2%), Cl···H (8.9%), O···H (7.3%), and N···H (5.1%) are the most dominant intermolecular contacts in the crystal structure. O···H, N···H, H···C, F···H, F···C, and O···O are the only contacts that have the characteristic features of short and significant interactions. AIM study indicated predominant covalent characters for the Fe–C interactions. Also, the electron density (ρ(r)) at the bond critical point correlated inversely with the Fe–C distances. 相似文献
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The crystal structure of the title compound(C24H24N2O5, Mr = 420.45) has been determined by single-crystal X-ray diffraction. The crystal is of triclinic, space group P1 with a = 8.991(1), b = 11.166(1), c = 11.169(1) , α = 91.413(2), β = 105.887(2), γ = 90.992(2)°, V = 1077.8(2) 3, Z = 2, Dc = 1.296 g/cm3, F(000) = 444, μ(MoKα) = 0.091 mm-1, the final R = 0.0466 and wR = 0.1507 for 4185 observed reflections(I 2σ(I)). The single-crystal X-ray diffraction data indicated intermolecular C(17)–H(17)O(4), C(5)–H(5)… O(4) hydrogen bonds and C–H…π interaction in the structure. 相似文献
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A facile synthesis of novel dispiro oxindole-pyrrolothiazole-androsterone hybrid heterocycles has been achieved through 1,3-dipolar cycloaddition. The reaction proceeds stereo- and regioselectively, affording a single isomer of the product in excellent yields with the formation of two C–C and one C–N bonds and creation of four new contiguous stereocenters in one step. 相似文献
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A. R. Suresh Babu 《合成通讯》2013,43(3):451-458
2‐Arylidene‐1,3‐indanediones undergo regioselective 1,3‐dipolar cycloaddition with the azomethine ylide generated from acenaphthenequinone and sarcosine to afford a rare class of complex dispiropyrrolidines in good yield. Single‐crystal X‐ray crystal analysis of one of the products confirms the structure and regiochemistry of the cycloaddition. 相似文献
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The 1,3‐dipolar cycloaddition of an azomethine ylide generated by a decarboxylative route from sarcosine and isatin to 1‐benzyl‐3,5‐diarylmethylidene‐piperidin‐4‐ones afforded novel di‐spiro‐indolo/pyrrolidino/piperidines in moderate yields. Further cycloaddition of these di‐spiro compounds to nitrile oxide afforded tri‐spiro‐indolo/pyrrolidino/piperadino/isoxazolines in moderate yields with high regio‐ and stereoselectivity. 相似文献
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Aliphatic and aromatic nitro compounds were selectively reduced to their corresponding amino derivatives in good yields using formic acid and raney nickel. This system is found to be compatible with several sensitive functionalities such as halogens, -OH, -OCH3, -CHO, -COCH3, -COC6H5, -COOH, -COOC2H5, -CONH2, -CN, -CH=CH-COOH, -NHCOCH3. The reduction can be carrid out not only with HCOOH but also with HCOONH4. 相似文献
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Mahalingam Poornachandran 《合成通讯》2013,43(15):2507-2517
Synthesis of a series of spirooxindolonitro pyrrolizidines and spiroindanonitro pyrrolizidines has been accomplished. The nonstabilized azomethine ylides generated from isatin and ninhydrin with proline reacted with nitro styrenes to regioselectively yield spirocycloadducts. 相似文献
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Assem Barakat Matti Haukka Saied M. Soliman M. Ali Abdullah Mohammed Al-Majid Ayman El-Faham Luis R. Domingo 《Molecules (Basel, Switzerland)》2021,26(23)
Straightforward regio- and diastereoselective synthesis of bi-spirooxindole-engrafted rhodanine analogs 5a–d were achieved by one-pot multicomponent [3 + 2] cycloaddition (32CA) reaction of stabilized azomethine ylide (AYs 3a–d) generated in situ by condensation of L-thioproline and 6-chloro-isatin with (E)-2-(5-(4-chlorobenzylidene)-2,4-dioxothiazolidin-3-yl)-N-(2-morpholinoethyl)acetamide. The bi-spirooxindole-engrafted rhodanine analogs were constructed with excellent diastereo- and regioselectivity along with high chemical yield. X-ray crystallographic investigations for hybrid 5a revealed the presence of four contiguous stereocenters related to C11, C12, C19 and C22 of the spiro structure. Hirshfeld calculations indicated the presence of many short intermolecular contacts such as Cl...C, S...S, S...H, O...H, N...H, H...C, C...C and H...H interactions. These contacts played a very important role in the crystal stability. The polar nature of the 32CA reaction was studied by analysis of the conceptual DFT reactivity indices. Theoretical study of this 32CA reaction indicated that it takes place through a non-concerted two-stage one-step mechanism associated with the nucleophilic attack of AY 3a to the electrophilic ethylene derivative. 相似文献