An Efficient Synthesis of 2,4,6-Triarylpyridines via Solvent-Free Reaction between Acetophenoneoximes and Aldehydes
作者:Mehdi Adib、Shabnam Mahernia、Mohammad Mahdavi
DOI:10.1055/s-0033-1341109
日期:——
An efficient synthesis of 2,4,6-triarylpyridines is described. Heating a mixture of an acetophenoneoxime and an aldehyde under solvent-free conditions afforded Krohnke pyridines in excellent yields. In this method acetophenoneoximes are directly used for the preparation of Krohnke pyridines under metal-free conditions.
An efficient synthesis of 2,4,6-triarylpyridines is described which involves heating a mixture of an acetophenone oxime and an epoxy styrene under neutral, solvent-free conditions. Krohnke pyridine products are obtained in excellent yields. (C) 2014 Published by Elsevier Ltd.
Novel solid-supported dimerization–heteroannulation of chalcones: simple and efficient synthesis of 2,4,6-triaryl-3-methylarylpyridines
作者:Anil K. Verma、Summon Koul、Ajay P.S. Pannu、Tej K. Razdan
DOI:10.1016/j.tet.2007.06.049
日期:2007.9
2,4,6-Triaryl-3-methylarylpyridines were obtained, in 60-70% yield, by a novel one-pot solventless solid-supported dimerization-heteroannulation reaction of chalcones and compounds possessing terminal -CONH2 functionality, at 125-135 degrees C, using immobilized Bi(III) nitrate and Zn(II) chloride as co-catalyst. Initially, chalcones were prepared, in nearly quantitative yield, by a modified aldol condensation, in neutral aqueous medium, in the presence of p-toluenesodium sulfonate. (c) 2007 Elsevier Ltd. All rights reserved.
DINITRO MONOMER, DIAMINE MONOMER, POLYIMIDE AND MODIFIED POLYIMIDE
申请人:TAIWAN TEXTILE RESEARCH INSTITUTE
公开号:US20140179878A1
公开(公告)日:2014-06-26
A polyimide including a structure shown as Formula II is provided,
wherein X is halogen, A
1
is selected from one of Formula 1 to Formula 18, and n is from 2 to 500,