Selective mono-and diamination of polyfluorinated benzenes and pyridines with liquid ammonia
作者:T. A. Vaganova、S. Z. Kusov、V. I. Rodionov、I. K. Shundrina、E. V. Malykhin
DOI:10.1007/s11172-007-0351-2
日期:2007.11
decafluoro-m-xylene, decafluorobiphenyl, hexafluorobenzene, and pentafluorobenzene with liquid ammonia was investigated. Bis-aminodefluorination temperatures for the majority of substrates were shown to exceed significantly the corresponding temperatures of monoaminodefluorination. The optimal conditions for selective preparation of mono-and diaminopolyfluoro(het)arenes were elucidated. An efficient method for
五氟吡啶、2,3,5,6-四氟吡啶、4-氯四氟吡啶、3,5-二氯三氟吡啶、八氟甲苯、α,α,α,2,3,5,6-七氟甲苯、十氟间二甲苯、十氟联苯的胺化,六氟苯和五氟苯与液氨进行了研究。大多数底物的双氨基脱氟化温度显着超过单氨基脱氟化的相应温度。阐明了选择性制备单和二氨基多氟(杂)芳烃的最佳条件。提出了一种从五氟苯和六氟苯与氨水基于与冠醚络合的非选择性反应中形成的产物混合物中分离特定多氟苯二胺的有效方法。