基于Friedel-Crafts反应的3-吲哚取代苯硼唑的水相合成

报道了一种基于Friedel-Crafts反应的3-吲哚取代苯硼唑的水相合成方法.以邻甲酰苯硼酸和吲哚为原料,无需外加催化剂,在室温下使用纯水为反应介质,以中等到定量的产率得到3-吲哚取代的苯硼唑类化合物.该方法具有操作简单、合成效率高、环境友好的优点.     

吲哚马来酰亚胺类化合物的合成及其抗肿瘤活性

为寻找具有抗肿瘤活性的新化合物, 设计合成吲哚马来酰亚胺类化合物, 并评价其体外抗肿瘤活性. 以吲哚与2-氯乙酰胺为起始原料, 经取代、缩合等反应合成了单吲哚马来酰亚胺衍生物5a～5t, 以5-硝基吲哚和不同的N-(3-氯丙基)叔胺经取代、还原、缩合等反应得到了双吲哚马来酰亚胺衍生物9a～9f. 共合成了26个未见文献报道的新化合物, 其结构经质谱、元素分析和核磁共振氢谱确证. 采用MTT法, 测试了目标化合物对肿瘤细胞株HL60, ECA-109, A549, SMMC-7721和PC-3的增殖抑制活性, 结果表明部分化合物对所测肿瘤细胞株均显示一定的抑制作用.     

吲哚马来酰亚胺类蛋白激酶C抑制剂的研究进展

吲哚马来酰亚胺类化合物是对星型孢菌素进行结构改造而得到的一类新型蛋白激酶C抑制剂. 对近年来吲哚马来酰亚胺类化合物在结构修饰、合成和生物活性等方面的研究进行了总结和概述, 重点介绍了吲哚马来酰亚胺类化合物的合成方法, 讨论了各种合成方法的优缺点.     

金催化的吲哚与末端炔烃的分子间烷基化反应

尝试了用金(Au)催化吲哚和炔烃的Friedel-Crafts烷基化反应, 具体探讨了金(I)配合物催化吲哚与末端炔烃的烷基化反应的条件, 并制备了一系列尚未见文献报道的双取代β-吲哚烷基化衍生物. 产物的结构经1H NMR, 13C NMR, MS和元素分析确证. 并对其反应机理可能性进行了推测.     

利用三氟甲基磺酸钪催化的吲哚去芳构化反应合成3,3'-双吲哚衍生物

报道了一类新颖的三氟甲基磺酸钪催化的吲哚-2-甲醇的去芳构化反应.该反应利用吲哚-2-甲醇衍生物在酸性催化下发生极性翻转的特性,将其吲哚环3-位的亲核中心转变为亲电位点,实现与另一分子吲哚发生偶联反应,合成了一系列具有环外双键结构的3,3'-双吲哚衍生物,产率中等到优秀.其中N-磺酰基团的强诱导作用和大位阻效应是吲哚-...     

新型双吲哚马来酰亚胺衍生物的合成

以1-(3-氧代四氢吡喃丙基)-吲哚-3-乙醛酸甲酯(5)和吲哚-3-乙酰胺(6)为原料,在催化剂叔丁醇钾的四氢呋喃溶液存在下发生偶合反应,经浓盐酸处理得脱保护的中间体7,再经甲磺酰化反应、氨解反应得到4种新的具有不同氨烷基侧链的双吲哚马来酰亚胺衍生物9a,9b,9d,9e.目标产物结构通过1H NMR,13C NMR,MS和HRMS确证.     

铜催化加成/取代串联反应构建四取代的三吲哚甲烷

在温和的条件下,利用3-乙酰基吲哚与吲哚的加成/取代串联反应,高效地合成了一系列高度拥挤的四取代三吲哚甲烷.该方法通过在3-乙酰基吲哚的氮原子上引入吸电子基团,提高了3-乙酰基吲哚的反应活性,具有原料廉价易得、底物适用性广、操作简便等优点.     

二乙基锌对原位产生吲哚亚胺的对映选择性加成反应

发展了乙基锌对原位产生的不饱和亚胺的对映选择性共轭加成,磺酰吲哚衍生物在乙基锌存在下原位生成不饱和亚胺,手性亚磷酰胺配体-铜络合物催化二乙基锌对该原位产生的不饱和亚胺反应以最高99%的产率和80%的对映选择性得到了一系列3位取代的光学活性的吲哚衍生物.     

2种吲哚衍生物的N-烷基化产物的制备

吲哚-3-乙醛酸甲酯和3-吲哚乙腈在碱存在下,以烷基卤或硫酸烷基酯为亲电试剂进行N-烷基化反应,合成了6种新的N-烷基化吲哚化合物。 研究了吲哚化合物及烷基化试剂的结构、溶剂和碱对N-烷基化反应的影响。 具有强吸电子取代基的吲哚-3-乙醛酸甲酯使用弱碱Cs2CO3在室温就可顺利进行烷基化反应,产率达到93%;而具有较弱吸电子取代基的3-吲哚乙腈,需要使用强碱NaH才能进行烷基化反应。     

手性吲哚啉衍生物合成方法的研究进展

吲哚啉衍生物广泛存在于自然界中,因具有多种生物学活性而引起广泛关注.近年来,手性吲哚啉衍生物成为此领域的研究热点,也报道了多种相应的合成方法,主要包括动力学拆分、不对称合成、手性合成子策略等,不对称Domino级联反应作为近年来发展较快的领域,也引起了广泛关注,对以上合成方法加以综述.     

Enantioselective synthesis of (3-indolyl)glycine derivatives via asymmetric Friedel-Crafts reaction between indoles and glyoxylate imines

Chiral phosphoric acid-catalyzed enantioselective Friedel-Crafts reaction of indoles with ethyl glyoxylate imines was developed. With 10 mol % of the catalyst, the Friedel-Crafts reactions between a wide range of indoles and imines have been carried out, affording optically active (3-indolyl)glycine derivatives with excellent yields and high enantioselectivities (up to 87% ee).     

Asymmetric Friedel-crafts reaction of indoles with imines by an organic catalyst

In this communication, we report an asymmetric Friedel-Crafts reaction of indoles with imines catalyzed by a bifunctional cinchona alkaloid catalyst. This is the first efficient organocatalytic asymmetric Friedel-Crafts reaction of indoles with imines. This reaction is operationally simple and, unprecedentedly, affords high enantioselectivity for a wide range of indoles and both aryl and alkyl imines. This establishes a direct, convergent, and versatile approach to optically active 3-indolyl methanamines, a structural motif embedded in numerous indole alkaloids and synthetic indole derivatives.     

Convenient synthesis of bis(indolyl)alkanes by dithiocarbohydrazone Schiff base/Zn(ClO_4 )_2 6H_2 O catalyzed Friedel–Crafts reaction of indoles with imines

A new, convenient and excellent yield procedure for the preparation of bis(indolyl)methanes(BIMs) by Friedel–Crafts reaction of indoles with imines in the presence of dithiocarbohydrazone Schiff base/ Zn(ClO4)2 6H2 O as a highly stable, effective and readily available catalyst is described. Moderate to good yields(up to 99% yield) were obtained with both substrates for imine derivatives. This procedure is simple, practical and economic.     

Organic hydrogen phosphites and hydrogen phosphates catalyzed Friedel-Crafts amidoalkylation of indoles with aryl aldimines

A highly efficient and selective Friedel-Crafts amidoalkylation reaction of indoles with N-Ts aryl aldimines has been developed utilizing dimethyl hydrogen phosphite or diphenyl hydrogen phosphate as the organocatalysts, providing a facile and cost-effective process for synthesis of 3-indolyl methanamine derivatives in good to excellent yields. This transformation displays a broad substrate scope and wide functional-group tolerability, regardless of the electronic and steric properties of N-Ts aryl aldimines. Given that the developed catalytic Friedel-Crafts amidoalkylation reaction exhibits several salient features such as metal-free catalysis, high efficiency, low cost and mild reaction condition, this process might have practical applications in the synthesis of 3-indolyl methanamine derivatives.     

9-Thiourea Cinchona alkaloid supported on mesoporous silica as a highly enantioselective, recyclable heterogeneous asymmetric catalyst

A readily recycled and regenerated heterogeneous catalyst of 9-thiourea epi-quinine supported on mesoporous silica exhibits enhanced enantioselectivity (up to 99.2%) in the asymmetric Friedel-Crafts reaction of imines with indoles.     

Triflic acid-catalyzed highly stereoselective friedel-crafts aminoalkylation of indoles and pyrroles

A simple and efficient synthesis to both enantiomers of highly enantiomerically enriched alpha-trifluoromethyl-alpha-(heteroaryl)-glycine derivatives via highly stereoselective aminoalkylation of indoles and pyrroles is described. The triflic acid-catalyzed reaction of enantiomeric 3,3,3-trifluoro-pyruvate-alpha-methylbenzyl imines with indoles and pyrroles and the subsequent Pd-catalyzed hydrogenolysis of the methylbenzyl group provided the products in high yields and excellent enantioselectivities.     

Chiral sulfonimide as a Brønsted acid organocatalyst for asymmetric Friedel-Crafts alkylation of indoles with imines

Binaphthyl-based chiral sulfonimide (CSI) is demonstrated for the first time to be an efficient, strong Br?nsted acid in asymmetric organocatalysis. A series of CSIs were synthesized and screened in the asymmetric Friedel-Crafts alkylation of indoles with imines. Good to excellent yields and enantioselectivities have been achieved. It was proved that it was crucial to wash the CSI catalyst with HCl before use.     

Mannich Reaction of Indole with Cyclic Imines in Water

An efficient MsOH promoted direct Mannich reaction of indoles with α-nonsubstituted aliphatic cyclic imines has been developed. The reactions were performed in water and the obtained piperidin-2-yl-indoles act as a useful precursor for the synthesis of various alkaloid-like derivatives.     

Facile Synthesis of Unsymmetrical N-Aryl-2, 2-di(1H-indol-3-yl) Acetamide Derivatives

A facile and highly efficient method has been developed for the synthesis of unsymmetrical N-aryl-2,2-di(1H-indol-3-yl)acetamide derivatives by regioselective Friedel-Crafts alkylation of the N-aryl-2-hydroxy-2-(1H-indol-3-yl) acetamide derivatives with various indoles catalyzed by 2 mol/L H₂SO₄ at room temperature in a short reaction time, the yield was up to 94%.     

SPINOL-derived phosphoric acids: synthesis and application in enantioselective Friedel-Crafts reaction of indoles with imines

A new class of chiral phosphoric acids with spirobiindane as scaffold were conveniently synthesized from (S)-1,1'-spirobiindane-7,7'-diol ((S)-SPINOL) and employed to catalyze the asymmetric Friedel-Crafts reaction of indoles with imines to afford 3-indolyl methanamines. High yields (68-97%) and excellent enantioselectivities (up to 99% ee) were obtained.