Ring transformations of some 4-aminopteridine 3-oxides and derivatives
作者:Marjan Kočevar、Branko Stanovnik、Miha Tišler
DOI:10.1016/s0040-4020(01)91861-7
日期:1983.1
Syntheses of 4-aminopteridine 3-oxides are described. The pyrimidine part undergoes transformations with various reagents to give 4-hydroxyaminopteridines, substituted pyrazines, or substituted 1,2,4-oxadiazolyl- pyrazines. s-Triazolo(l,5-a)pyrazines can be prepared from the 1,2,4-oxadiazolylpyrazines. The ring opening of the pyrimidine part of pteridines proceeds either by a C2-N3 or N3-C4 bond cleavage
Kocevar, M.; Stanovnik, B.; Tisler, M., Journal of Heterocyclic Chemistry, 1982, vol. 19, p. 1397 - 1402
作者:Kocevar, M.、Stanovnik, B.、Tisler, M.
DOI:——
日期:——
Nachbargruppenbeteiligung bei der Bildung von kondensierten Azinen. Über die Darstellung von Derivaten von Pyrazolo(3,4-b)pyrazin, Isoxazolo(4,5-b)pyrazin und Isothiazolo(5,4-b)pyridin. (Heterocyclen, 210. Mitt.)