共查询到18条相似文献,搜索用时 124 毫秒
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以3-异硫氰基氧化吲哚与3-丙二腈缩合的3-烯氧化吲哚为原料,乙腈为溶剂,在无催化剂存在的条件下于室温发生[3+2]环加成反应,合成了6个新型的螺环吡咯酮双氧化吲哚类化合物(3a~3f),产率91%~95%,dr 17/1~>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~3f对人白血病细胞(K562)的体外抗肿瘤活性。结果表明:化合物3c对K562具有明显的抑制活性(IC50为36.3 μM),与阳性对照药顺铂接近。 相似文献
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以取代的3-羧酸活化色酮、靛红与消旋脯氨酸为原料,乙腈为溶剂,依次经1,3-偶极子[3+2]环加成和脱羧反应,合成了8个新型的二氢色原酮拼接多环吡咯螺环氧化吲哚类化合物 (3a~3h),产率68%~87%, dr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~3h对人白血病细胞(K562)的体外抑制活性。结果表明:化合物3d,3f, 3g对K562具有一定的抑制活性(IC50=46.3~69.4 μmol·L-1)。 相似文献
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以色酮-氧化吲哚合成子与3-烯基苯并呋喃酮为原料,在催化剂1,8-二氮杂二环十一碳-7-烯作用下,在二氯甲烷中发生Michael/Michael加成关环反应,合成了6个未见文献报道的螺环六氢山酮素-氧化吲哚-苯并呋喃酮类拼接物(3a^3f),产率75%~87%,dr值3/1~5/1,其结构经1H NMR,13C NMR和HR-MS(ESI-TOF)表征。采用MTT法研究了3a^3f对人白血病细胞(K562)的体外抗增殖活性。结果表明:化合物3c,3e和3f对K562增殖有一定的抑制活性。 相似文献
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Przemyslaw Gawel Cagatay Dengiz Dr. Aaron D. Finke Dr. Nils Trapp Prof. Dr. Corinne Boudon Dr. Jean‐Paul Gisselbrecht Prof. Dr. François Diederich 《Angewandte Chemie (International ed. in English)》2014,53(17):4341-4345
A versatile, two‐step synthesis of highly substituted, cyano‐functionalized diaryltetracenes has been developed, starting from easily accessible tetraaryl[3]cumulenes. This unprecedented transformation is initiated by [2+2] cycloaddition of tetracyanoethylene (TCNE) to the proacetylenic central double bond of the cumulenes to give an intermediate zwitterion, which after an electrocyclization cascade and dehydrogenation yields 5,5,11,11‐tetracyano‐5,11‐dihydrotetracenes in a one‐pot procedure. A subsequent copper‐assisted decyanation/aromatization provided the target 5,11‐dicyano‐6,12‐diaryltetracene derivatives. All of the postulated structures were confirmed by X‐ray crystallography. The new chromophores are thermally highly stable and feature promising fluorescence properties for potential use in optoelectronic devices. They are selective chemosensors for CuI ions, which coordinate to one of the CN substituents and form a 1:1 complex with an association constant of Ka=1.5×105 L mol?1 at 298 K. 相似文献
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Xiaoming Ma Xiaofeng Zhang Guoshu Xie John Mark Awad Wei Zhang 《Tetrahedron letters》2019,60(40):151127
The one-pot synthesis of tetrahydro-epiminobenzo[b]azocines through a sequential 1,3-dipolar cycloaddition and intramolecular Staudinger-aza-Wittig reaction sequence is reported. This methodology provides a new and efficient approach for medium-sized and bridged nitrogen heterocyclic molecules. 相似文献
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Chuncheng Zou Yuanyuan Han Chuikun Zeng Tony Y. Zhang Jinxing Ye Gonghua Song 《中国化学快报》2020,31(2):377-380
An organocatalytic asymmetric [3+2] cycloaddition of trifluoromethyl-containing azomethine ylides with cyclic 2,4-dienones was developed.The process enables efficient incorporation of CF3 groups into functionalized spiro [pyrro lid in-3,2'-oxindoles] in high yields with good to excellent enantio-and diastereoselectivities. 相似文献
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The title hydrocarbon 3, a C14H14 tetracyclic tetraene of C2v-symmetry, was synthesized by new routes starting from 1,8,9,10-tetrachloro-11,11-dimethoxytricyclo[6.2.1.02,7]undeca-3,5,9-triene (1). The Diels-Alder cycloaddition of 1 with 2-chloroacrylyl chloride, a ketene equivalent, followed by subsequent reduction, dechlorination and deacctalization afforded the ketol 12 as a key intermediate. Elaboration of target compound 3 was carried out by either the method of ring enlargement of 12 or (better) the route of Diels-Alder reaction of decarbonylated 12 with trans-1,2-bis(phenylsulfonyl)ethcnc, an acetylene equivalent, to give trienol 17, followed by dehydration. Upon irradiation, 3 underwent intercyclic [2 + 2]-addition to caged hexacyclic diene 4. At 120°C, 3 decomposed into barrelene and benzene quantitatively. 相似文献
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The synthesis of a phosphoramidite reagent for 5′-modification of oligonucleotides by introducing an arylacetylene residue
has been described. Using the reaction with 3-(perylen-3-yl)propyl azide as an example, it was shown that the acetylene derivatives
of oligonucleotides synthesized using this reagent undergo CuI-catalyzed [3+2] dipolar cycloaddition. Fluorescent conjugates were obtained in high yields and characterized by mass spectra.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 7, pp. 1220–1226, July, 2006. 相似文献