132124-82-4Relevant academic research and scientific papers
Reactivities of 6-amino-1,3-dimethyl-5-thioformyluracil toward nucleophiles and its application to synthesis of pyrido[2,3-d]pyrimidines
Hirota, Kosaku,Kubo, Keiko,Sajiki, Hironao
, p. 542 - 544 (1997)
The reaction of the 5-thioformyluracil 1 with phenylhydrazine and various amines readily afforded the hydrazone 3a and Schiff bases 3b-d, respectively. Further, carbanions and Wittig reagents reacted with 1 to give pyrido[2,3-d]pyrimidines 4 and 9. The co
Iodobenzene diacetate-promoted N-N and N-O bond formation for pyrazolo- and isoxazolopyrimidine syntheses
Monguchi, Yasunari,Hattori, Kazuyuki,Maegawa, Tomohiro,Hirota, Kosaku,Sajiki, Hironao
experimental part, p. 669 - 680 (2009/12/26)
Pyrazolo[3,4-d]pyrimidine-4,6-dione derivatives were efficiently synthesized via the intramolecular N-N bond coupling of 5-iminomethyl-6-aminouracil derivatives using iodobenzene diacetate. The oxidative coupling was also applied to the analogous N-O bond
Iminophosphorane-mediated synthesis of fused uracils. A facile one-pot preparation of pyrimido[4,5-d]pyrimidine derivatives
Molina,Vilaplana,Perez
, p. 7855 - 7864 (2007/10/02)
The aza Wittig-type reaction of iminophosphoranes 3, 5-[(N-Arylimino)methyl]-6- [(triphenylphosphoranylidene)amino]-1,3-dimethyl uracils, with aromatic isocyanates leads to the functionalized pyrimido[4,5-d]pyrimidines 4. Iminophosphoranes 5, prepared from 3 by selective reduction with sodium borohydride, undergo dihydropyrimido annelation by reaction with isocyanates to give 7-amino-6-aryl-1,3-dimethyl-1,2,3,4,5,6- hexahydropyrimido[4,5-d]pyrimidines 6.
