Purines, pyrimidines, and imidazoles part 54. Interconversion of some intermediates in the de novo biosynthesis of purine nucleotides
作者:Noel J. Cusack、Gordon Shaw、Fatma I. Logemann
DOI:10.1039/p19800002316
日期:——
decarboxylated in situ to 5-amino-1-(2-pyridyl)imidazole. Reaction of 2-N-formylamino-N-(2-pyridyl)acetamide with ammonia and ammonium chloride gave 5-aminoimidazole and a similar reaction with the nucleotide 2-N-formylglycineamide ribotide similarly gave evidence for aminoimidazole formation. 4-Cyano-5-imidazolone, prepared by reaction of 2-cyano-N-formylacetamide with nitrous acid and reduction of the
分别从乙基或苄基α-氨基-α-氰基乙酸酯和甲酰胺酸乙酯盐酸盐制得的乙基和5-氨基-1-(2-吡啶基)咪唑-4-羧酸苄基酯和甲酰胺基酸盐的盐酸盐继而转化为5-氨基将氨基-1-(2-吡啶基)-咪唑-4-羧酸原位脱羧为5-氨基-1-(2-吡啶基)咪唑。的2-反应Ñ -formylamino- ñ - (2-吡啶基)与氨和氯化铵乙酰胺,得到5-氨基咪唑并与核苷酸类似的反应2- Ñ -formylglycineamide核糖核苷酸类似地提供了证据为氨基咪唑的形成。2-氰基-N反应制得的4-氰基-5-咪唑啉酮-亚甲酰乙酰胺与亚硝酸和在100°C下用氨和亚硫酸铵还原生成的羟基亚氨基衍生物,得到5-氨基咪唑-4-甲酰胺。讨论了所涉及反应的含义。