Domino reactions of cyclic enaminones leading to selective synthesis of pentacyclic indoles and its functionalization
作者:Wei Fan、Yan-Rong Li、Qun Li、Bo Jiang、Guigen Li
DOI:10.1016/j.tet.2016.06.058
日期:2016.8
established, providing selective protocol to pentacyclic indoles with different substituted patterns (up to 50 examples). Both substitutions on the cyclic enaminone ring and reaction temperatures showed obvious impact on the reaction pathways. For instance, selective allylic hydroxylation and allylic esterification of in situ generated indoles depend on reaction temperatures. With special substituents
A simple method for the rapid synthesis of 2-amino-7,7-dimethyl-5-oxo-1,4-diaryl-hexahydroquinoline-3-carboxamide derivatives
作者:Fahimeh Sadat Hosseini、Mohammad Bayat
DOI:10.1007/s13738-020-01920-3
日期:2020.9
AbstractSimple synthesis of oxoquinoline carboxamide derivatives via one-pot, multi-component reaction of enaminones derived from the addition of dimedone to various anilines with aromatic aldehydes and cyanoacetamide is described. Optimal reaction conditions for the synthesis of products were obtained, when EtOH/H2O (1:1) was used as the solvent at 80 °C, in the presence of piperidine as the catalyst
摘要描述了通过衍生自二甲酮加成各种苯胺与芳香族醛和氰基乙酰胺衍生的烯胺酮的一锅,多组分反应,简单合成氧代喹啉羧酰胺衍生物。在以哌啶为催化剂的情况下,在80°C下使用EtOH / H 2 O(1:1)作为溶剂时,获得了合成产物的最佳反应条件。反应在5至25分钟内完成,收率高至高(74%至85%)。该方案涉及迈克尔反应,亚胺-烯胺互变异构和环化序列。产物的结构由其IR,质量,1 H NMR和13推导出1 H NMR谱。该方法包括一些重要方面,包括在温和条件下的简单操作,易于接近的反应物,后处理程序,高原子经济性以及使用乙醇/水作为绿色介质。 图形摘要
Catalyst-free Synthesis of Tetrahydroacenaphtho[1,2-<i>b</i>
]indolone Derivatives <i>via</i>
One-pot Four-component Reaction
作者:Mohammad Bayat、Zeinab Amiri
DOI:10.1002/jhet.3167
日期:2018.6
A simple and efficient one‐pot synthesis of tetrahydroacenaphtho[1,2‐b]indolone derivatives via four‐component reaction of 5,5‐dimethylcyclohexane‐1,3‐dione (dimedone), arylamines, acenaphthoquinone, and active methylene compounds under catalyst‐free conditions is described. The reactions were carried out under mild conditions using ethanol as solvent. Advantages of this method include simple experimental
在催化剂的作用下,通过5,5-二甲基环己烷-1,3-二酮(二甲酮),芳胺、,苯醌和活性亚甲基化合物的四组分反应,简单高效地一锅合成四氢ac并[1,2- b ]吲哚酮衍生物描述了无条件。反应在温和的条件下使用乙醇作为溶剂进行。该方法的优点包括简单的实验和后处理程序,易于获得的起始原料以及高收率。
Allylic Amination and <i>N</i>-Arylation-Based Domino Reactions Providing Rapid Three-Component Strategies to Fused Pyrroles with Different Substituted Patterns
作者:Bo Jiang、Ying Li、Man-Su Tu、Shu-Liang Wang、Shu-Jiang Tu、Guigen Li
DOI:10.1021/jo301323r
日期:2012.9.7
New three-component domino reaction providing divergent approaches to multifunctionalized fusedpyrroles with differentsubstitutedpatterns have been established (40 examples). The direct C(sp3)–N bond formation was achieved through intermolecular allylic amination in a one-pot operation, and N-arylation of amines was realized by varying N-amino acidenaminones. The reaction is easy to perform simply
Multicomponent formation of fused pyrroles through p-TsOH promoted N-arylation
作者:Ying Li、Qiu-Yun Li、Hai-Wei Xu、Wei Fan、Bo Jiang、Shu-Liang Wang、Shu-Jiang Tu
DOI:10.1016/j.tet.2013.02.026
日期:2013.4
Concise and efficient N-arylation-based domino [3+2] heterocyclization promoted by p-TsOH has been established for the synthesis of 27 examples of 3-arylamino substitutedfusedpyrrole derivatives in 70–90% yields. The present methodology shows attractive properties, such as mild reaction conditions, concise one-pot operation, short reaction periods of 15–30 min, and easy purification. It can avoid