476689-72-2Relevant academic research and scientific papers
Novel stereocontrolled addition of allylmetal reagents to α-imino esters: Efficient synthesis of chiral tetrahydroquinoline derivatives
Di Fabio, Romano,Alvaro, Giuseppe,Bertani, Barbara,Donati, Daniele,Giacobbe, Simone,Marchioro, Carla,Palma, Carlotta,Lynn, Sean M.
, p. 7319 - 7328 (2007/10/03)
To prepare in multigram scale new antagonists of the glycine binding site associated to the NMDA receptor, an efficient distereoselective route was set up. The addition of suitable allyltin reagents to chiral N-aryl α-imino esters (R-(+)-tert-butyl lactate used as chiral auxiliary), gave the corresponding α amino acid-type derivative in high chemical yield and optical purity. This allylation reaction represents a novel example of efficient long-range stereodifferentiation process. In the last part of the synthesis, a regioselective Heck-type cyclization reaction enabled preparation of the target tetrasubstituted exocycle and trisubtituted endocycle double bond derivatives.
