fluorinating agent, was applied in the dehydration, intramolecular cyclization, and mono- and difluorination reactions of some 5-trifluoromethyl-1H-pyrazoles and 2-pyrazolines employing a general, mild, and efficient methodology. The azole precursors were synthesized from the reactions of acyclic and cyclic trifluoroacetylated enol ethers with hydrazines [NH2NHR, where R = C6H5, C6F5, 2-Furanoyl] and showed a
在这项研究中,通用的三
氟二乙
氨基
硫三
氟化物(
DAST)被用于某些5-三
氟甲基-1 H-
吡唑和2-
吡唑啉的脱
水,分子内环化以及单和二
氟化和二
氟化反应。一般,温和,有效的方法。唑类前体从的反应合成无环和环状三
氟乙酰化的烯醇醚与
肼[NH 2 NHR,其中R = C 6 H ^ 5,C 6 ˚F 5,2- Furanoyl],并显示在
DAST的存在下分化的
化学行为。