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- W2953014722 abstract "Reaction of ethyl or methyl 2-dimethylaminomethylene-3-oxoalkanoates with hydroxylamine hydrochloride in methanol solution afforded in high yields the relative esters of 5-substituted 4-isoxazolecarboxylic acids II. These esters were hydrolyzed generally with concentrated hydrochloric acid-acetic acid mixtures to the corresponding carboxylic acids in satisfactory yields. Ethyl or methyl esters II isomerized with sodium ethoxide or methoxide, respectively, to the corresponding esters or hemiesters of 2-cyano-3-oxoalkanoic acids generally in excellent to satisfactory yields. Reaction of methyl 5,5-dimethyl-3-dimethylaminomethylene-2,4-dioxohexanoate with hydroxylamine hydrochloride afforded in moderate yield methyl 4-(2,2-dimethyl-1-oxopropyl)-5-isoxazolecarboxylate, which was converted by acid hydrolysis as above to 4-t-butyl-4-hydroxyfuro[3,4-d]isoxazol-6-(4H)-one." @default.
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- W2953014722 date "1991-02-01" @default.
- W2953014722 modified "2023-09-27" @default.
- W2953014722 title "Reaction of 2-dimethylaminomethylene-1,3-diones with dinucleophiles.<b>X</b>. synthesis of 5-substituted ethyl or methyl 4-isoxazolecarboxylates and methyl 4-(2,2-dimethyl-1-oxopropyl)-5-isoxazolecarboxylate" @default.
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- W2953014722 doi "https://doi.org/10.1002/jhet.5570280247" @default.
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