Toward a total synthesis of the stemofoline alkaloids: advancement of a 1,3-dipolar cycloaddition strategy
作者:Charles S. Shanahan、Nathan O. Fuller、Bjoern Ludolph、Stephen F. Martin
DOI:10.1016/j.tetlet.2011.05.121
日期:2011.8
Novel, intramolecular 1,3-dipolar cycloadditions of azomethine ylides have been applied to the synthesis of functionalized core structures of the stemofoline alkaloids. In an effort to maximize the efficiency of this key transformation in the context of an eventual total synthesis of these complex natural products, a number of strategic modifications to the cycloaddition substrate were investigated. The
偶氮甲碱叶立德的新型分子内 1,3-偶极环加成已被应用于合成茎叶碱生物碱的功能化核心结构。为了在这些复杂天然产物的最终全合成的背景下最大限度地提高这一关键转化的效率,研究了对环加成底物的许多战略修饰。集体努力为 1,3-偶极环加成的可操作区域化学控制元素提供了有用的见解,从而导致了茎叶碱生物碱。制备了合成这些生物碱的潜在中间体。