Synthesis and Some Chemical Transformations of Adamantyl-Substituted Pyrazolones
摘要:
1-Substituted 3-(1-adamantyl)-4,5-dihydro-1H-pyrazol-5-ones and 3-(1-adamantyl)-4,5-dihydroiso-xazol-5-one were synthesized by reaction of ethyl 3-(1-adamantyl)-3-oxopropanoate with various hydrazine derivatives and hydroxylamine hydrochloride. Nitrosation of adamantyl-substituted pyrazolones with sodium nitrite in acetic acid gave the corresponding 4-hydroxyimino derivatives. Reactions of 3-(1-adamantyl)-4,5-di-hydro-1H-pyrazol-5-ones and 3-(1-adamantyl)-4,5-dihydroisoxazol-5-one with aromatic and heterocyclic aldehydes led to the formation of condensation products at position 4 of the heteroring.
Reactions of adamantyl-substituted keto and diketo carboxylic acid esters with hydrazine and phenylhydrazine were studied. Ethyl 3-(1-adamantyl)-2-(1-adamantylcarbonyl)-3-oxopropanoate reacted with hydrazine to give ethyl 3,5-di(1-adamantyl)-1H-pyrazole-4-carboxylate. Reactions of ethyl 2-(1-adamantylcarbonyl)-3-oxobutanoate and ethyl 4-(1-adamantyl)-3-oxo-2-(1-oxoethyl)butanoate with hydrazine and phenylhydrazine followed a complicated pattern and led to the formation of mixtures of the corresponding hydrazides and pyrazolones.
Reactions of adamantyl-substituted keto esters with hydrazine and phenylhydrazine
作者:K. M. Bormasheva、O. N. Nechaeva、I. K. Moiseev
DOI:10.1134/s1070428008120063
日期:2008.12
Reactions of adamantyl-substituted keto and diketo carboxylic acid esters with hydrazine and phenylhydrazine were studied. Ethyl 3-(1-adamantyl)-2-(1-adamantylcarbonyl)-3-oxopropanoate reacted with hydrazine to give ethyl 3,5-di(1-adamantyl)-1H-pyrazole-4-carboxylate. Reactions of ethyl 2-(1-adamantylcarbonyl)-3-oxobutanoate and ethyl 4-(1-adamantyl)-3-oxo-2-(1-oxoethyl)butanoate with hydrazine and phenylhydrazine followed a complicated pattern and led to the formation of mixtures of the corresponding hydrazides and pyrazolones.
Synthesis and Some Chemical Transformations of Adamantyl-Substituted Pyrazolones
作者:K. M. Bormasheva、S. A. Kon’kov、I. K. Moiseev
DOI:10.1134/s1070428010100209
日期:2010.10
1-Substituted 3-(1-adamantyl)-4,5-dihydro-1H-pyrazol-5-ones and 3-(1-adamantyl)-4,5-dihydroiso-xazol-5-one were synthesized by reaction of ethyl 3-(1-adamantyl)-3-oxopropanoate with various hydrazine derivatives and hydroxylamine hydrochloride. Nitrosation of adamantyl-substituted pyrazolones with sodium nitrite in acetic acid gave the corresponding 4-hydroxyimino derivatives. Reactions of 3-(1-adamantyl)-4,5-di-hydro-1H-pyrazol-5-ones and 3-(1-adamantyl)-4,5-dihydroisoxazol-5-one with aromatic and heterocyclic aldehydes led to the formation of condensation products at position 4 of the heteroring.