In the presence of LiNTf2, epoxides undergo ringopening with high regioselectivity and in good yield when they are treated with nucleophiles such as amines, hydrazines and thiophenol.
Calcium-Catalyzed Synthesis of 1,2-Disubstituted 3-Benzazepines
作者:Helena Damsen、Meike Niggemann
DOI:10.1002/ejoc.201501106
日期:2015.12
described, using simple enantiopure amino acids as the chiral building blocks. Intramolecular Friedel–Crafts alkylationtowards seven-membered rings was achieved with high diastereoselectivity for the first time and accomplished by a biocompatible calcium catalyst. The simple and cost efficient approach allows for the variation of all substituents in the 3-benzazepine by a change of the substitution pattern
β-amino alcohols and their respective 2-phenyl-N-alkyl aziridines as potential DNA minor groove binders
作者:Miguel M. Vaidergorn、Zumira A. Carneiro、Carla D. Lopes、Sérgio de Albuquerque、Felipe C.C. Reis、Sofia Nikolaou、Juliana F.R. e Mello、Giovani L. Genesi、Gustavo H.G. Trossini、A. Ganesan、Flavio S. Emery
DOI:10.1016/j.ejmech.2018.07.055
日期:2018.9
It is known that aziridines and nitrogen mustards exert their biological activities, especially in chemotherapy, via DNA alkylation. The studied scaffold, 2-phenyl-1-aziridine, provides a distinct conformation compared to commonly used aziridines, and therefore, leads to a change in high-strained ring reactivity towards biological nucleophiles, such as DNA. The above series of compounds was tested
Ga‐Catalyzed Temperature‐Dependent Oxazolidinone/Piperazine Synthesis from Phenyl Aziridines Involving a Divergent Ligand‐Assisted Mechanism
作者:Maria Distressa G. Billacura、Ryan D. Lewis、Neil Bricklebank、Alex Hamilton、Christopher J. Whiteoak
DOI:10.1002/adsc.202300537
日期:2023.9.19
of CO2 and aziridines to form oxazolidinones is presented. It has been possible to optimize the catalyst system for the selective formation of a single regioisomer, in excellent yield, under relatively mild reaction conditions. The optimized catalyst system has been successfully applied to a range of substituted aziridines derived fromstyrene oxide. It has been observed that aziridines bearing two
Route to Functionalized Tetrahydrobenzo[<i>d</i>]azepines via Re<sub>2</sub>O<sub>7</sub>-Mediated Intramolecular Friedel–Crafts Reaction
作者:Yuzhu Zheng、Qing Huang、Xiong Fang、Youwei Xie
DOI:10.1021/acs.joc.3c01977
日期:2024.2.2
We describe a Re2O7-mediated intramolecular dehydrative Friedel–Crafts reaction for the efficient synthesis of various benzo-fused heterocycles such as benzazepines and benzazocines. This process is characterized by a broad substrate scope, mild reaction conditions, high efficiency, and high atom economy. The potential application of this methodology was exemplified by the facile preparation of a NMDA
我们描述了 Re 2 O 7介导的分子内脱水弗里德尔-克来福特反应,用于有效合成各种苯并稠合杂环化合物,例如苯并氮杂卓和苯并佐辛。该工艺具有底物范围广、反应条件温和、效率高、原子经济性高等特点。 NMDA 拮抗剂以及 SKF 38393 过程中的关键中间体的轻松制备证明了该方法的潜在应用。