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
An efficient and practical approach for the synthesis of allfour 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