polycyclization of oxotriphenylhexanoates. The polycyclization is governed by electronic effects, and three major synthetic paths have been established leading to stereochemically complex tricyclic frameworks with up to five stereogenic centers. The method is compatible with an array of functional groups, allowing pharmacophoric elements to be introduced post cyclization.
Synthesis of N-2-aryl-substituted 1,2,3-triazoles mediated by magnetic and recoverable CuFe2O4 nanoparticles
作者:Dao-Qing Dong、Hui Zhang、Zu-Li Wang
DOI:10.1007/s11164-016-2457-3
日期:2016.7
An efficient and economic system for the synthesis of N-2-aryl-substituted 1,2,3-triazoles in the presence of CuFe2O4 was developed. The corresponding products can be obtained in good to excellent yields. It is interesting to note that the catalyst could be reused for five consecutive trials without significant decreases in its activity.
Visible-Light-Promoted [3 + 2] Cyclization of Chalcones with 2-Mercaptobenzimidazoles: A Protocol for the Synthesis of Imidazo[2,1-<i>b</i>]thiazoles
作者:Ziren Chen、Fei Xue、Yonghong Zhang、Weiwei Jin、Bin Wang、Yu Xia、Mengwei Xie、Ablimit Abdukader、Chenjiang Liu
DOI:10.1021/acs.orglett.2c00867
日期:2022.5.6
diverse imidazo[2,1-b]thiazoles via an electron–donor–acceptor (EDA) complex has been developed. This novel aminothiolation can be realized under only visible light irradiation without the aid of external photocatalysts, transition metals, and oxidants. Mechanistic investigations have revealed that the thiol anions and chalcones form EDA complexes, providing a novel strategy for the synthesis of imidazo[2
已经开发了一种可见光促进的查耳酮和 2-巯基苯并咪唑之间的 [3 + 2] 环化,用于通过电子 - 供体 - 受体 (EDA) 复合物构建不同的咪唑并[2,1- b ] 噻唑。这种新型氨基硫醇化可以在仅可见光照射下实现,无需外部光催化剂、过渡金属和氧化剂的帮助。机理研究表明,硫醇阴离子和查耳酮形成EDA配合物,为咪唑并[2,1- b ]噻唑的合成提供了一种新的策略。
CuO-Promoted Construction of <i>N</i>-2-Aryl-Substituted-1,2,3-Triazoles via Azide-Chalcone Oxidative Cycloaddition and Post-Triazole Arylation
An efficient one-pot three-component stepwise approach for the synthesis of N-2-aryl-substituted-1,2,3-triazoles has been developed. By using this azide-chalcone oxidative cycloaddition and post-triazole arylation, a series of N-2-aryl-substituted-1,2,3-triazoles are readily prepared under mild conditions in excellent yields and high regioselectivity. Both the catalyst and substrates are readily available.