Synthesis of noradamantane derivatives by ring-contraction of the adamantane framework
作者:Benjamin Zonker、Jonathan Becker、Radim Hrdina
DOI:10.1039/d1ob00471a
日期:——
We describe a triflic acid promoted cascade reaction of adamantane derivatives consisting of a decarboxylation of N-methyl protected cyclic carbamates and a subsequent intramolecular nucleophilic 1,2-alkyl shift to generate ring contracted iminium triflates. This reaction expands the family of similar transformations, such as Wagner–Meerwein-, Demjanov–Tiffeneau-, Meinwald- or (semi-)pinacol-rearrangement
我们描述了三氟甲磺酸促进金刚烷衍生物的级联反应,该反应由N-甲基保护的环状氨基甲酸酯的脱羧和随后的分子内亲核 1,2-烷基转移组成,以产生环缩的三氟甲磺酸亚胺。该反应扩展了类似转变的家族,例如 Wagner-Meerwein-、Demjanov-Tiffeneau-、Meinwald- 或(半)频哪醇重排。它允许从简单的羟基取代的金刚烷前体开始,通过几个步骤制备去甲金刚烷衍生物。