Reactivity of acyclic (pentadienyl)iron(1+) cations with phosphonate stabilized nucleophiles: application to the synthesis of oxygenated metabolites of carvone
作者:Do W. Lee、Charles F. Manful、Jayapal Reddy Gone、Yuzhi Ma、William A. Donaldson
DOI:10.1016/j.tet.2015.12.035
日期:2016.2
The addition of phosphonate stabilized carbon nucleophiles to acyclic (pentadienyl)iron(1+) cations proceeds predominantly at an internal carbon to afford (pentenediyl)iron complexes. Those complexes bearing an electron withdrawing group at the σ-bound carbon (i.e., 13/14) are stable and isolable, while complexes which do not contain an electron withdrawing group at the σ-bound carbon undergo CO insertion
膦酸酯稳定的碳亲核试剂向无环(戊二烯基)铁(1+)阳离子的添加主要在内部碳处进行,以提供(戊二烯基)铁配合物。那些络合物承载的电子在σ结合的碳吸电子基团(即,13 / 14)是稳定的和可分离的,而其中不包含电子在σ结合的碳吸基复合物经受CO插入,还原消除和缀合双键,得到环己烯酮的产品(21 / 22)。膦酸酯的脱质子化13 / 14或21与低聚甲醛反应得到烯化产物。该方法学用于制备氧化的香芹酮代谢物(±)-25和(±)-26。