Reaction of N-hydroxyacetoacetanilide with carbonyl reagents.
作者:KATSUMI TABEI、ETSUKO KAWASHIMA、TETSUZO KATO
DOI:10.1248/cpb.29.244
日期:——
The reaction of N-hydroxyacetoacetanilide derivatives (1a-g) with hydroxylamine in aqueous ethanol gave 3-methyl-4-arylhydrazono-5-isoxazolones (3a-g). When ethanol or chloroform was used as the reaction medium, the reaction of N-hydroxyacetoacetanilide (1a) with carbonyl reagents gave N-phenylhydroxylamine derivatives and five-membered heterocycles such as 3-methyl-5-isoxazolone or 3-methyl-5-pyrazolone derivatives. The mechanism of the formation of these products is discussed.
SATO KAZUO; KINOTO TAKAO; SUGAI SOJI, CHEM. AND PHARM. BULL., 34,(1986) N 4, 1553-1560
作者:SATO KAZUO、 KINOTO TAKAO、 SUGAI SOJI
DOI:——
日期:——
A new synthesis of 5-alkyl-3-aryl-4-oxazolin-2-ones.
作者:KAZUO SATO、TAKAO KINOTO、SOJI SUGAI
DOI:10.1248/cpb.34.1553
日期:——
The reaction of (N-aryl-N-hydroxy)acylacetamides 11 with p-nitrobenzenesulfonyl chloride in the presence of 2 eq of triethylamine gave 5-alkyl-3-aryl-4-oxazolin-2-ones 10. In the same manner, 5-alkyl-3-aryl-4-halogeno-4-oxazolin-2-ones 14 were synthesized from the corresponding N-aryl-N-hydroxy-α-halogeno-acylacetamides 12, which were prepared by chlorination or bromination of (N-aryl-N-hydroxy)acylacetamides 11.