Reactions of cinnamylideneamino isoxazoles with dimethyl acetylenedicarboxylate.
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概要
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The interaction of 4-cinnamylideneamino-3-methyl-5-styrylisoxazoles (<B>1</B>) with dimethyl acetylenedicarboxylate has given an isoxazolyldihydropyridine (<B>2</B>) as major and an isoxazolylaminofumarate (<B>3</B>) as minor products respectively. 3-Cinnamylideneamino-5-methylisoxazoles (<B>4</B>) behave similarly. Isoxazolylaminofumarates (<B>3</B> and <B>6</B>) have been identified by unambiguous synthesis.
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