Heterocycles. Part I. A new route to the synthesis of substituted 2-aminopyrimidines
作者:N. R. El-Rayyes
DOI:10.1002/jhet.5570190240
日期:1982.3
Heterocyclic aldehydes (A) reacted with alkyl aryl ketones (B) to give the corresponding 1,3-diaryl-2-propen-1-ones (Ia-1). Condensation of these chalcones with guanidine produced the corresponding 2-amino-4,6-diarylpyrimidines (IIa-1). The structure of all products was substantiated by chemical and spectroscopic methods.
EL-RAYYES, N. R., J. HETEROCYCL. CHEM., 1982, 19, N 2, 415-419
作者:EL-RAYYES, N. R.
DOI:——
日期:——
Synthesis of thiophene-linked pyrimidopyrimidines as pharmaceutical leads
作者:M B SIDDESH、BASAVARAJ PADMASHALI、K S THRIVENI、C SANDEEP
DOI:10.1007/s12039-014-0614-z
日期:2014.5
Thiophene-substituted chalcones were cyclised with guanidine in the presence of potassium hydroxide to get 4-substituted-6-thiophenopyrimidines 2a–e which were then refluxed with acetylacetone to obtain pyrimidopyrimidines 3a–e. Compounds 2a–e were also refluxed with ethylacetoacetate to afford pyirmidopyirimidines 4a–e which on refluxing with POCl3 in presence of DMF produced compounds 5a–e. Nucleophilic substitution reactions on 5a-e were carried out with aniline to obtain 6a-e. The structures of the newly synthesised compounds have been confirmed by elemental analysis and spectral studies. Some selected compounds have been screened for antibacterial and analgesic activities.