在目前的工作中,包括 Zn (II) 和N-十六烷基咪唑配体的同核配位络合物首次用作合成 3,4-二氢-2 H -1,3-苯并恶嗪单体的高效均相中性有机催化剂. 因此,通过曼尼希型缩合反应成功合成了N-烷基或N-芳基取代的单苯并恶嗪和双苯并恶嗪(21 个实例)。毫不费力地以高收率和短反应时间获得纯产物,使该方法比现有的常见苯并恶嗪合成方法更有用和更有利。
One-pot three-component synthesis of dihydrobenzo- and naphtho[<i>e</i>]-1,3-oxazines in water
作者:Bijoy P. Mathew、Mahendra Nath
DOI:10.1002/jhet.147
日期:2009.9
A simple, green and efficient method has been developed for the synthesis of biologically and materially important dihydrobenzo/naphtho[e]-1,3-oxazines in good to excellent yields through a Mannich-type condensation cyclization reaction of aromatic alcohols with HCHO and primary amines in aqueous media at ambient temperature. J. Heterocyclic Chem., (2009).
通过芳族醇与HCHO和伯醇的曼尼希式缩合环化反应,已开发出一种简单,绿色,有效的方法,以良好至极佳的产率合成具有生物学和物质重要性的二氢苯并/萘并[ e ] -1,3-恶嗪。在室温下在水性介质中的胺。J.杂环化学,(2009)。
An eco-friendly synthesis and antimicrobial activities of dihydro-2H-benzo- and naphtho-1,3-oxazine derivatives
作者:Bijoy P. Mathew、Awanit Kumar、Satyasheel Sharma、P.K. Shukla、Mahendra Nath
DOI:10.1016/j.ejmech.2009.12.058
日期:2010.4
3]oxazin-3(4H)-yl)ethane derivatives was obtained through an eco-friendly Mannich type condensation–cyclization reaction of phenols or naphthols with formaldehyde and primary amines in water at ambient temperature. Preliminary in vitro antimicrobialactivity of the synthesized compounds was assessed against six pathogenic fungi, two Gram-negative and two Gram-positive bacteria. Some of the screened compounds
1,3-<i>bis</i>(2'-Hydroxybenzyl)imidazolidines as Novel Precursors of 3,3′-Ethylene-<i>bis</i>(3,4-dihydro-2H-1,3-benzoxazine)
作者:Augusto Rivera、Gloria Inées Gallo、Ma. Elena Gayón、Pedro Joseph-Nathan
DOI:10.1080/00397919408010219
日期:1994.7
Abstract A one-step synthesis of 3,3′-ethylene-bis(3,4-dihydro-6-substituted-2H-1,3-benzoxazines) (2a-e) from 1,3-bis(2′-hydroxy-5′-substituted-benzyl)imidazolidines (1a-e) and formaldehyde is reported.
Screening of simple carbohydrates as a renewable organocatalyst for the efficient construction of 1,3-benzoxazine scaffold
作者:Ayhan Yıldırım、Yunus Kaya、Mustafa Göker
DOI:10.1016/j.carres.2021.108458
日期:2021.12
performed to study the detailed mechanism of organocatalyst assisted synthesis of the benzoxazinemonomers. The results obtained from these calculations showed that the more realistic reaction pathway involves formation of a phenolate based intermediate which loses a water molecule to form benzenaminium ion. Subsequently, this ion provides the formation of the corresponding benzoxazines with good yields
[EN] BENZOXAZINE MONOMERS AND POLYMERIC COATINGS<br/>[FR] MONOMÈRES DE BENZOXAZINE ET REVÊTEMENTS POLYMÈRES
申请人:LUXEMBOURG INST SCIENCE & TECH LIST
公开号:WO2020193293A1
公开(公告)日:2020-10-01
The invention is directed to monomer(s) based on a 3,4-dihydro-2H-1,3-benzoxazine derivative. The invention also concerns a composition comprising a mixture of said monomer(s) and of a second benzoxazine derivative selected from the group consisting of monofunctional amines bridged with diphenolic compounds, monophenolic compounds bridged with diamines and diamines bridged by diphenolic compounds, or a mixture thereof. These compounds are suited for the preparation of benzoxazine derivative heterogeneous polymers, for example having the shape of coatings or films, exhibiting enhanced anti-inflammatory and/or anti-oxidant properties. A material with a coated substrate with said heterogeneous polymer may be a part of implantable materials, such as implantable metallic apparatus such as a catheter, a metallic implant, or a metallic prosthesis, biologically compatible. These implantable materials may be safely used because they are preventing any inflammatory and/or oxidative reaction(s) from a host into which the coated substrate is grafted or implanted.