Lawesson's reagent → HCID 14234968, Verbindung
Reaktionsgleichung
[CH2:1]([C:3]1[C:4]([O:16][CH3:17])=[N:5][C:6]2[N:7]([CH:10]=[C:11]([C:13]([NH2:15])=O)[N:12]=2)[C:8]=1[CH3:9])[CH3:2].COC1C=CC(P2(SP(C3C=CC(OC)=CC=3)(=S)S2)=[S:27])=CC=1>O1CCCC1>[CH2:1]([C:3]1[C:4]([O:16][CH3:17])=[N:5][C:6]2[N:7]([CH:10]=[C:11]([C:13](=[S:27])[NH2:15])[N:12]=2)[C:8]=1[CH3:9])[CH3:2]Komponenten
4
Edukt 2
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
A mixture of 20.0 g (0.0854 mmol) of 6-ethyl-7-methoxy-5-methylimidazo-[1,2-a]pyrimidine-2-carboxamide and 25.4 g (0.0629 mmol) of Lawesson's Reagent in 470 ml of tetrahydrofuran (THF) was refluxed for 4 hours. The mixture was then cooled, and the product was filtered and washed with THF, then ether to obtain 12.06 g (56%) of 6-ethyl-7-methoxy-5-methylimidazo[1,2-a]pyrimidine-2-thiocarboxamide as a yellow solid melting at 248°-259° C.