Synthesis of Novel 3-Amino-5-trifluoromethylazoles: A Convenient Method of Obtaining <i>N</i>-(Azol-3-yl)amines
作者:Marcos Martins、Wilson Cunico、Sergio Brondani、Rodrigo Peres、Nilo Zimmermann、Fernanda Rosa、Gabriela Fiss、Nilo Zanatta、Helio Bonacorso
DOI:10.1055/s-2006-926443
日期:2006.5
A convenient method to obtain 10 3-amino-5-trifluoromethyl-5-hydroxy-4,5-dihydroisoxazoles and 18 3-amino-5-trifluoromethyl-1H-pyrazoles by cyclocondensation reaction of 4-amino-4-ethoxy-1,1,1,-trifluorobut-3-en-2-ones [CF3COCH=C(OEt)NHR, where R = H, Me, Et, CH2CH2OH, CMe2Et, CH2Ph, Ph, 4-NH2C6H4, 4-AcC6H4, 4-NO2C6H4, 5-methylisoxazol-3-yl, thiazol-2-yl, CH2CO2Et, CH(Ph)CO2Me, CH(i-Bu)CO2Et] with hydroxylamine, hydrazine and phenylhydrazine is reported.
一种简便的方法,通过 4-氨基-4-乙氧基-1,1,1,-三氟丁烯-3-烯-2-酮[CF3COCH=C(OEt)NHR]的环缩合反应,获得 10 个 3-氨基-5-三氟甲基-5-羟基-4,5-二氢异噁唑和 18 个 3-氨基-5-三氟甲基-1H-吡唑、其中 R = H、Me、Et、CH2CH2OH、CMe2Et、CH2Ph、Ph、4-NH2C6H4、4-AcC6H4、4-NO2C6H4、5-甲基异恶唑-3-基、噻唑-2-基、CH2CO2Et、CH(Ph)CO2Me、CH(i-Bu)CO2Et] 与羟胺、肼和苯肼的环缩合反应。