ELBAYOUKI, KHAIRY, A. M.;NIELSEN, F. E.;PEDERSEN, E. B., J. HETEROCYCL. CHEM., 1985, 22, N 3, 853-856
作者:ELBAYOUKI, KHAIRY, A. M.、NIELSEN, F. E.、PEDERSEN, E. B.
DOI:——
日期:——
Phosphorus pentoxide in organic synthesis. XIX. Mixtures of phosphorus pentoxide and ortho-substituted arylamines as reagents in the synthesis of 9-aryl-9H-purin-6-amines
作者:Khairy A. M. El-Bayouki、Flemming E. Nielsen、Erik B. Pedersen
DOI:10.1002/jhet.5570220349
日期:1985.5
9-Aryl-9H-purin-6-amines 2 were readily obtained by heating 5-acetamido-4-amino-2-methylpyrimidin-6(1H)-one 1 in mixtures of phosphoruspentoxide, triethylamine hydrochloride and sterically hindered arylamines. Nonsterically hindered arylamines resulted in formation of 6-arylaminopurines 3. The mechanism for rearrangement of 2 into 3 is discussed.