Reactions of regioisomeric 3,3-dimethyl- and 2,2-dimethyl-6-trifluoromethyl-2,3-dihydro-4-pyrones with N-nucleophiles
作者:V. Ya. Sosnovskikh、M. Yu. Mel'nikov
DOI:10.1007/bf02494648
日期:1999.5
Reactions of 2,2-dimethyl-6-trifluoromethyl-2,3-dihydro-4-pyrone with ethylenediamine, hydrazine, or hydroxylamine yield 5-methyl-7-trifluoromethyl-2,3-dihydro-1H-1,4-diazepine, 3(5)-(2-hydroxy-2-methylpropyl)-5(3)-trifluoromethylpyrazole, and 5-hydroxy-3-(2-hydroxy-2-methylpropyl)-5-triflouromethyl-Δ2, respectively. The same compounds were obtained from 2-amino-1,1,1-trifluoro-6-hydroxy-6-methylhept-2(Z)-en-4-one
2,2-二甲基-6-三氟甲基-2,3-二氢-4-吡喃酮与乙二胺、肼或羟胺反应生成 5-甲基-7-三氟甲基-2,3-二氢-1H-1,4-二氮杂、3(5)-(2-羟基-2-甲基丙基)-5(3)-三氟甲基吡唑和5-羟基-3-(2-羟基-2-甲基丙基)-5-三氟甲基-Δ2。相同的化合物是从 2-amino-1,1,1-trifluoro-6-hydroxy-6-methylhept-2(Z)-en-4-one 和 2-hydroxy-6,6-dimethyl-2-trifluoromethyltetrahydro -4-吡喃酮。