Synthesis and configuration determination of all enantiopure stereoisomers of the melatonin receptor ligand4-phenyl-2-propionamidotetralin using an expedient optical resolution of 4-phenyl-2-tetralone
作者:Simone Lucarini、Silvia Bartolucci、Annalida Bedini、Giuseppe Gatti、Pierfrancesco Orlando、Giovanni Piersanti、Gilberto Spadoni
DOI:10.1039/c1ob06369c
日期:——
An efficient and practical approach for the synthesis of all four stereoisomers of the MT2 melatonin receptor ligand 4-phenyl-2-propionamidotetralin (4-P-PDOT), each in enantiomerically pure form (ee > 99.9%), was developed. The strategy involved an optical resolution procedure of the key precursor (±)-4-phenyl-2-tetralone with the unusual resolving agent (S)-mandelamide, through the formation of four
一种有效且实用的方法,用于合成MT 2褪黑激素受体配体的所有四个立体异构体4-苯基-2-丙酰胺四氢萘开发了对映体纯形式(ee> 99.9%)的(4-P-PDOT)。该策略涉及关键前体的光学拆分程序(±)-4-苯基-2-四氢萘酮 与不寻常的解决剂 (S)-扁桃酰胺,通过形成四个二氢萘-螺-恶唑烷丁-4-一非对映异构体。有趣的是,NMR实验观察与几何计算相结合,为关键螺环立体异构体的所有立体中心提供了明确的构型分配。在酸性条件下切割每个单个螺环非对映异构体得到对映体(R)-或(S)-4-苯基-2-四氢萘酮然后通过立体选择反应将其转化为每个4-P-PDOT单一对映体。