خدابخش نیکنام

Aromatic-condensedo xazinone derivatives are an important class of heterocyclic compounds,since many of these heterocyclic systems exhibit biological activities' For example, gphlhalene^ condensed1 ,3-oxazin-3-onehsa ve'b"en reportedt o ait as.antibacterial.lgents' This class of compoundh asa lsol .en ur.A as precufsorsin the preparationo fphosphinicl igands for asYmmehic catalys. Recently, some syntheses of naphthalene-condensed 1,3 -oxazin-3-ones derivatives have been reported using condoensationo f amino alkyl-naphtholsa s precur-so6w ith phosgenein the presenceo f t rltityr"rr"" f3l andc arbonjiJii*ia-of insteado f phosgene[4 ]. Howeveri,n thesem ethodse' ither ;;;;;;. r.