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 Interplay of Thio(seleno)amide/Vinylogous Thio(seleno)amide “Resonance” and the Anisotropic Effect of Thiocarbonyl and Selenocarbonyl Functional Groups
spectra assigned. Both the NMR data and the results of theoretical calculations at the abinitio level of theory were employed to elucidate the adopted structures of the compounds in terms of E/Z isomerism and s-cis/s-trans configuration. In the case of the asymmetrically N(Me)Ph-substituted compounds, abinitio GIAO-calculated ringcurrent effects of the N-phenyl group were applied to successfully determine