29064-02-6Relevant articles and documents
Smooth Metal-Free Photoinduced Preparation of Valuable 8-Arylxanthines
Abdulla, Havall Othman,Amin, Ahmed A.,Raviola, Carlotta,Opatz, Till,Protti, Stefano,Fagnoni, Maurizio
supporting information, p. 1448 - 1452 (2019/06/27)
A set of 8-arylxanthines was prepared under metal-free conditions and in aqueous solvents from arylazo sulfones and caffeine or theophylline. Notably, the process took place by simply exposing the reaction vessel to visible or solar light, and unreacted xanthine could be easily recovered during the purification step.
REACTIONS OF 5,6-DIAMINO-1,3-DIMETYLURACIL WITH HALOGEN DERIVATIVES OF CHALCONES
Orlov, V. D.,Kolos, N. N.,Tueni, M.,Yur'eva, E. Yu.,Ivkov, S. M.
, p. 788 - 794 (2007/10/02)
The reaction of 5,6-diamino-1,3-dimethyluracil with 1,3-diaryl-2,3-dibromopropan-1-ones gave β-(5-amino-6-imino-1,3-dimethyluracil)chalcones, and conditions for their cyclocondensation to pyrimidinodiazepines were found.For substantiation of the reaction mechanism, the reaction of the diamine with other halogen derivatives of chalcones was studied.The IR, UV, and mass spectra of the synthesized compounds and their condensation products are discussed.
A NEW CONTRACTION OF PTERIDINE 5-OXIDES TO PURINES AND A 7-DEAZAPURINE BY THE 1,3-DIPOLAR CYCLOADDITION REACTION
Ichiba, Misuzu,Kanazawa, Hashime,Tamura, Zenzo,Senga, Keitaro
, p. 2317 - 2319 (2007/10/02)
The 1,3-dipolar cycloaddition reaction of pteridine 5-oxides with dimethyl acetylenedicarboxylate resulted in a new ring contraction of the pyrazine moiety to give purines and a 7-deazapurine.