Purines, pyrimidines, and imidazoles. Part 64. Alkylation and acylation of some aminoimidazoles related to intermediates in purine nucleotide de novo and thiamine biosynthesis
作者:Grahame Mackenzie、Hilary A. Wilson、Gordon Shaw、David Ewing
DOI:10.1039/p19880002541
日期:——
Treatment of ethyl 5-amino-1-benzylimidazole-4-carboxylate with butyl-lithium and methyl iodide gave the 5-N-methylamino derivative (4b) and the 3-methiodide (5) whereas ethyl 5-amino-1-(2,3-O-isopropylidene-β-D-ribofuranosyl)imidazole-4-carboxylate gave both the 5-N-methylamino (6b) and 2-methyl (6d) derivatives. Ethyl 5-amino-1-benzylimidazole-4-carboxylate with acetic anhydride or acetyl chloride