作者:Mark Kurth、Kristin Milinkevich
DOI:10.1055/s-0029-1218290
日期:2009.11
substitution reaction with 4-fluoro-3-nitrobenzoic acid to yield the starting scaffold 3 in excellent yields. Diversification of the acid with primary amines, followed nitrile oxide formation in situ (aryl oximes treated with bleach) and subsequent 1,3-dipolar cycloaddition to the exomethylene moiety delivered the spiroisoxazolinopiperdines. Reduction of the arylnitro group followed by acylation with acid
已开发出制备螺异恶唑啉并哌啶基苯甲酰胺的途径。N-Boc-4-哌啶酮经过 Wittig 烯化和 Boc 脱保护,然后与 4-氟-3-硝基苯甲酸进行亲核取代反应,以优异的产率得到起始支架 3。用伯胺使酸多样化,然后原位形成氧化腈(用漂白剂处理的芳基肟),随后与外亚甲基部分进行 1,3-偶极环加成,得到螺异恶唑并哌啶。芳基硝基还原,然后用酰氯酰化或用醛还原胺化产生螺异恶唑啉代哌啶基苯甲酰胺文库。