SYNTHESIS OF 5-AMINO-1- ARYL-4-CYANOIMIDAZOLES FROMN-ARYL-N′-(1,2-DICYANOVINYL)- FORMAMIDINES
摘要:
The aryl-(Z)-N-[2-amino-1,2-dicyanovinyl]formandine cyclize in the presence of base to give a 1,5-diamino-4-cyanoimidazole or a 1,5-diamino-4-(cyanoformimidoyl)imidazole, depending on the reaction conditions and the nature of the base used to induced cyclization.
Synthesis of 9-Aryl-6-aminopurines from 5-Amino-1-aryl-1H-imidazole-4-carbonitriles
作者:A. Yahay-Zadeh
DOI:10.1023/b:rujo.0000013141.59809.a3
日期:2003.11
5-Amino-1-aryl-1H-imidazole-4-carbonitriles were converted into 9-aryl-6-aminopurines via imidates formation at treating with CH(OEt)(3) and Ac2O followed by reaction with ammonia.
SYNTHESIS OF 5-AMINO-1- ARYL-4-CYANOIMIDAZOLES FROM<i>N</i>-ARYL-<i>N</i>′-(1,2-DICYANOVINYL)- FORMAMIDINES
作者:Asieh Yahya-Zadeh、Brian L. Booth
DOI:10.1081/scc-100106031
日期:2001.1
The aryl-(Z)-N-[2-amino-1,2-dicyanovinyl]formandine cyclize in the presence of base to give a 1,5-diamino-4-cyanoimidazole or a 1,5-diamino-4-(cyanoformimidoyl)imidazole, depending on the reaction conditions and the nature of the base used to induced cyclization.
Synthesis of 1-Substituted 5-Aminoimidazole-4-carbaldehydes and 8-Amino-1-(2-fluorobenzyl)imidazo[4’,5’:5,6]pyrido[2,3-<b><i>d</i></b>]pyrimidine
The syntheses of a number of 1-substituted 5-aminoimidazole-4-carbaldehydes 3, by the reduction of the corresponding 5-amino-4-cyanoimidazole derivatives is reported using LiAlH(OEt)3, prepared in situ from LiAlH4 and ethyl acetate. The compounds of type 1 are useful intermediates for the synthesis of elongated adenine derivatives.