Synthesis of chiral iodo-N,O-acetonide aminal scaffolds via an efficient cascade reaction of amino acid-derived epoxides
作者:J. Paige Souder、Zachary M. Evans、Joshua A. Driver、Eric J. Pozzo、Andrew J. Lampkins
DOI:10.1016/j.tetlet.2011.10.049
日期:2011.12
Novel amino acid-derived iodo-N,O-acetonide aminals were developed as chiral, non-epimerizable scaffolds to facilitate complex molecule synthesis. These scaffolds are readily prepared from commercially available amino acid derivatives in ⩽6 steps, contain an orthogonally-protected β-hydroxy amine moiety, and feature a directly reactive alkyl-iodide group for facile substitution chemistry. Further,
新型氨基酸衍生的碘-N,O-丙酮化物缩醛被开发为手性,不可表麻的支架,以促进复杂分子的合成。这些支架可通过⩽6步骤轻松地从市售氨基酸衍生物制备,包含正交保护的β-羟基胺部分,并具有直接反应性的烷基碘基团,可轻松实现取代化学。此外,开发了一种新颖的开环/环化级联反应,可以从容易获得的环氧化物衍生物中高效制备这些化合物(59-72%)。