Design of Two Alternative Routes for the Synthesis of Naftifine and Analogues as Potential Antifungal Agents
作者:Rodrigo Abonia、Alexander Garay、Juan Castillo、Braulio Insuasty、Jairo Quiroga、Manuel Nogueras、Justo Cobo、Estefanía Butassi、Susana Zacchino
DOI:10.3390/molecules23030520
日期:——
Two practical and efficient approaches have been implemented as alternative procedures for the synthesis of naftifine and novel diversely substituted analogues 16 and 20 in good to excellent yields, mediated by Mannich-type reactions as the key step of the processes. In these approaches, the γ-aminoalcohols 15 and 19 were obtained as the key intermediates and their subsequent dehydration catalyzed
已经实施了两种实用且有效的方法作为合成萘替芬和新型多样取代的类似物 16 和 20 的替代程序,收率良好至极好,由曼尼希型反应介导,作为该过程的关键步骤。在这些方法中,γ-氨基醇 15 和 19 作为关键中间体获得,随后它们分别由布朗斯台德酸(如 H2SO4 和 HCl)或路易斯酸(如 AlCl3)催化脱水,生成萘替芬,以及目标烯丙胺 16 和 20抗真菌试验结果表明,中间体 18(在其结构中同时带有 β-氨基酮基和 N-甲基官能团)和产物 20 的活性最强。特别是,结构 18b、18c 和烯丙胺 20c 的 MIC 值最低,在 0.5–7.8 µg/mL 范围内,对抗皮肤癣菌红色毛癣菌和须癣毛癣菌。有趣的是,带有 4-Br 作为苯环取代基的化合物 18b 也显示出对白色念珠菌和新型隐球菌的高活性,MIC80 = 7.8 µg/mL,是杀菌剂而非抑菌剂,相关 MFC 值 = 15.6 µg/