Synthesis of aminoalkylpyrazoles and-isoxazoles from cyclic β-(trifluoroacetyl) enamines
作者:V. G. Nenajdenko、S. V. Pronin、E. S. Balenkova
DOI:10.1007/s11172-007-0055-7
日期:2007.2
A method for the synthesis of cyclic β-(trifluoroacetyl) enamines was proposed. Reactions of the latter with hydrazine and hydroxylamine gave pyrazoles and isoxazoles, respectively, containing trifluoromethyl and ω-aminoalkyl fragments. Addition of hydrazine (hydroxylamine) to the above amino enones was regiospecific, the regiochemistry of the heterocyclization of trifluoromethyl ketones being different
提出了一种合成环状β-(三氟乙酰基)烯胺的方法。后者与肼和羟胺的反应分别产生吡唑和异恶唑,含有三氟甲基和ω-氨基烷基片段。将肼(羟胺)添加到上述氨基烯酮是区域特异性的,三氟甲基酮杂环化的区域化学不同于非氟化类似物的区域化学。