Synthesis and characterisation of N,N-disubstituted 2-amino-5-acylthiophenes and 2-amino-5-acylthiazoles
摘要:
Starting from halomethyl-ketones 8 and N,N'-persubstituted thioacrylamides 7 or their 2-aza analogues 11 a series of N,N-disubstituted 2-amino-5-acylthiophenes 10 and 2-amino-5-acylthiazoles 12, respectively are available. By starting from 1,3-dichloroacetone and using the same thioacrylamide derivatives 7 and 11 N,N-disubstituted 2-amino-5-(chloroacetyl)thiophenes 13 and 2-amino-5-(chloroacetyl)thiazoles 14 as well as N,N'-persubstituted bis-(2-amino-5-thienyl)ketones 15, 2-amino-5-thienyl-(2-amino-5-thiazolyl)ketones 16, and bis-(2-amino-5-thiazolyl)ketones 17, respectively are available. (C) 2002 Elsevier Science Ltd. All rights reserved.
The reaction of 2,2-dicyanoethenyl- and 1,2,2-tricyanoethenyl-substituted bromoalkanes, bromomethyl benzenes, thiophenes, and furans 19-22 with 3-aminothioacrylamides and their 2-azaanalogues 23 and 24 gives a series of 5-dicyanoethenyl- and 5-tricyanoethenyl-substituted 2-aminothiophenes, 2-aminothiazoles and their (hetero)benzologous analogues 25-32. The solvatochromism, which is a characteristic
Efficient Synthesis of 3-Aminothioacrylamides by Iminoformylation of Thioacetamides
作者:Andreas Rolfs、Jürgen Liebscher
DOI:10.1055/s-1994-25545
日期:——
Heating substituted thioacetamides 1 with either trismorpholinomethane or with a mixture of triethyl orthoformate and a secondary amine gives high yields of synthetically versatile 3-aminothioacryl-amides 4.
Solvent-Free Synthesis of 2-Amino-3-aryl-5-substituted Thiophenes as Anti-inflammatory Agents using KF-Al<sub>2</sub>O<sub>3</sub> under Microwave Irradiation