Hydrazine hydrate (1:1) → HCID 14638227, Verbindung
Reaktionsgleichung
O.[NH2:2][NH2:3].Cl[C:5]1[C:10]2[O:11][CH2:12][C:13](=[O:15])[NH:14][C:9]=2[N:8]=[C:7]([CH3:16])[N:6]=1>C(O)CCC>[NH:2]([C:5]1[C:10]2[O:11][CH2:12][C:13](=[O:15])[NH:14][C:9]=2[N:8]=[C:7]([CH3:16])[N:6]=1)[NH2:3]Komponenten
4
Edukt 2
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
12.8 ml of 98% hydrazine hydrate dissolved in 40 ml of n-butanol are dropped to a solution of 20 g of 4-chloro-2-methyl-6,7-dihydro-8H-pyrimido[5,4-b][1,4]oxazin-7-one in 320 ml of n-butanol at 117° C. within 30 minutes while stirring. The mixture is stirred for an additional 45 minutes at 117° C., then cooled to room temperature. The precipitate is filtered and washed with water to give 11.66 g (56.3%) of the product, m.p.: 262°-264° C.