Diastereoselective synthesis of spiro[benzo[d]pyrrolo[2,1-b]thiazole-3,3′-indolines] via cycloaddition reaction of N-phenacylbenzothiazolium bromides and 3-methyleneoxindoles
Molecular diversity of the cyclization reaction of 3-methyleneoxindoles with 2-(3,4-dihydronaphthalen-1(2H)-ylidene)malononitriles
作者:Yu-Ling Lu、Jing Sun、Ya-Jing Xie、Chao-Guo Yan
DOI:10.1039/c6ra00476h
日期:——
The cyclization reaction of 3-methyleneoxindoles with 2-(3,4-dihydronaphthalen-1(2H)-ylidene)malononitrile in ethanol in the presence of DBU at room temperature afforded functionalized 3′-iminospiro[indoline-3,2′-phenanthrenes] in good yields. However, the similar reaction of ethyl 2-cyano-2-(3,4-dihydronaphthalen-1(2H)-ylidene)acetate resulted in functionalized 3-oxospiro[indoline-3,2′-phenanthrenes]
在室温下,在DBU存在下,3-亚甲基吲哚与2-(3,4-二氢萘-1(2 H)-亚烷基)丙二腈在乙醇中的环化反应提供了功能化的3'-亚氨基螺[吲哚啉-3,2'-菲]。然而,乙基2-氰基-2-(3,4-二氢萘-1(2 H)-亚烷基)乙酸酯的相似反应导致官能化的3-氧螺环[吲哚啉-3,2'-菲]和苯并[ d ]菲咯[2,3- f ] [1,3]二氮杂ze取决于底物的结构。此外,3-苯乙叉基亚吲哚与乙基2-氰基-2-(3,4-二氢萘-1(2 H)的环加成反应)-亚烷基)乙酸酯产生螺[吲哚啉-3,2'-菲] -4'-腈衍生物。通过1 H NMR数据和14个单晶结构清楚地阐明了环螺硫辛多环的立体化学。
Diastereoselective synthesis of dispirooxindoles <i>via</i> [3+2] cycloaddition of azomethine ylides to 3-phenacylideneoxindoles and evaluation of their cytotoxicity
作者:Ying Huang、Yi-Xin Huang、Jing Sun、Chao-Guo Yan
DOI:10.1039/c8ra04375b
日期:——
structures indicated the reaction has high regioselectivity and diastereoselectivity. Furthermore, their biological activities have been preliminarily demonstrated by in vitro evaluation against mouse breast cancer cells 4T1 and human liver cancer cells HepG2 by MTT assay. The results demonstrated that some of the compounds showed cytotoxicities to cell lines of 4T1 and HepG2, and indicated that novel spirooxindoles
1,2,3,4-四氢异喹啉、靛红和3-亚苯肟吲哚在回流乙醇中进行三组分反应,得到二螺[二氢吲哚-3,1'-吡咯并[2,1 -a ]异喹啉-3',3'-二氢吲哚] ( 4a–4x )通过原位生成的偶氮甲碱叶立德与 3-phenacylideneoxindoles 的环外双键进行 1,3-偶极环加成,获得良好的产率。 1 H NMR谱和单晶结构表明该反应具有较高的区域选择性和非对映选择性。此外,通过MTT法对小鼠乳腺癌细胞4T1和人肝癌细胞HepG2进行体外评价,初步证明了它们的生物学活性。结果表明,一些化合物对4T1和HepG2细胞系表现出细胞毒性,并表明新型螺吲哚可能成为潜在的先导化合物,用于进一步对其医学应用进行生物筛选。
Additive-Free Three-Component Synthesis of Spiro-isoxazolidine-oxindoles Employing Trifluorodiazoethane
作者:Ekta Gupta、Sindoori R. Nair、Ruchir Kant、Kishor Mohanan
DOI:10.1021/acs.joc.8b02504
日期:2018.12.7
three-component protocol for the synthesis of trifluoromethylated spiro-isoxazolidine-oxindoles has been developed. This approach employs the 1,3-dipolar cycloaddition of trifluoromethyl nitrone, generated in situ from trifluorodiazoethane and nitrosoarene, with phenacylideneoxindoles. A range of phenacyclideneoxindoles and nitrosoarenes can be subjected to this reaction to generate the spiro-isoxazolidine-oxindole
Molecular diversity of cycloaddition reactions of the functionalized pyridinium salts with 3-phenacylideneoxindoles
作者:Qin Fu、Chao-Guo Yan
DOI:10.1016/j.tet.2013.05.034
日期:2013.7
cycloaddition reactions of a series of functionalized pyridinium salts, which were generated from reaction of pyridine with active alkyl halides such as p-nitrobenzyl bromide, N,N-diethyl chloroacetamide and phenacyl bromides with 3-phenacylideneoxindoles in the presence of triethylamine showed very interesting moleculardiversities. A series of the functionalized spiro[cyclopropane-1,3′-indolines], and 3-
A mild and efficient reaction of the Bestmann–Ohirareagent with N-unprotected isatin-derived olefins has been developed for the selective synthesis of spiro-pyrazoline-oxindoles and tricyclic pyrazoles. The reaction features an attractive product-selectivity depending on the substituent on isatin-derived olefin. Treatment of 3-aryl/alkylideneoxindoles with BOR afforded spiropyrazoline-oxindoles, whereas