Croatica Chemica Acta, Vol. 58 No. 1, 1985.
Izvorni znanstveni članak
Reaction of 2,5-Disubstituted-1,3,4-oxadiazoles
Ahmed A. El-Barbary
; Department of Chemistry, Faculty of Science, University of Tanta, Tanta, Egypt
Sažetak
Some 5-aryl-2-mercapto-1,3,4-oxadiazole (I) reacted with maleic
anhydride, maleic acid and p-benzoquinone affording 2-(5-aryl-
-1,3,4-oxadiazol-2-ylthio)succinic anhydrides (II), 2-(5-aryl-1,3,4-
-oxadiazol-2-ylthio)succinic acids (III) and 2-(2,5 dihydroxyphenylthio)- 5-aryl-l,3,4-oxadiazoles (IV), respectively. Treatment of 2- methylthio-5-phenyl-l,3-oxadiazole (V) with amines gives 2-[(alkyl or aryl)-amino]-5-phenyl-l,3,4-oxadiazoles (VI). Compound VIe condensed with aromatic aldehydes to give 2-(4-cinnamoylanilino)- 5-phenyl-l,3,4-oxadiazoles (VII) which on bromination afforded the dibromo derivative VIlI and on treatment with hydroxylamine afforded 2-[4-(5-aryl-2-isoxazolin-3-yl)anilino]-5-phenyl-1,3,4-oxadiazoles (IX). Reacting VII with hydrazine hydrate gave 2-[4-(5-aryl-2-pyrazolin-3-yl)anilino]-5-phenyl-l,3,4-oxadiazoles (X), while on treatement VII with acetylacetone and ethylacetoacetate
afforded 2- [4-(4-acetyl or carbethoxy-5-phenyl-l-cyclohexen -3-one-
-1-yl)anilino]-5-phenyl-l,3,4-oxadiazoles (XIIa, b), respectively.
Ključne riječi
Hrčak ID:
177741
URI
Datum izdavanja:
22.5.1985.
Posjeta: 918 *