This invention provides a method of making (S)-(+)-3-(aminomethyl)-5-methylhexanoic acid (pregabalin) or a salt thereof via an asymmetric hydrogenation synthesis. Pregabalin is useful for the treatment and prevention of seizure disorders, pain, and psychotic disorders. The invention also provides intermediates useful in the production of pregabalin.
An Enantioselective Synthesis of (<i>S</i>)-(+)-3-Aminomethyl-5-methylhexanoic Acid via Asymmetric Hydrogenation
作者:Mark J. Burk、Pieter D. de Koning、Todd M. Grote、Marvin S. Hoekstra、Garrett Hoge、Rex A. Jennings、William S. Kissel、Tung V. Le、Ian C. Lennon、Thomas A. Mulhern、James A. Ramsden、Robert A. Wade
DOI:10.1021/jo034397b
日期:2003.7.1
A concise enantioselective synthesis of (S)-(+)-3-aminomethyl-5-methylhexanoic acid (1, Pregabalin) has been developed. The key step is the asymmetric hydrogenation of a 3-cyano-5-methylhex-3-enoic acid salt 2 with a rhodium Me-DuPHOS catalyst, providing the desired (S)-3-cyano-5-methylhexanoate 3 in very high ee. Subsequent hydrogenation of the nitrile 3 with a heterogeneous nickel catalyst provides