Optically active amine derivative and method of synthesis

摘要

A readily available and inexpensive natural alpha-amino acid is converted into a compound represented by formula (1), which is then reacted with an organometallic reagent represented by formula (2) to give an optically active 5-hydroxyoxazolidine represented by formula (3), which is then treated with an acid to provide an optically active aminoketone represented by formula (4). The product is then converted into an optically active aminoalcohol represented by formula (5) or (6) by, for example reduction. The above process can provide an optically active aminoalcohol represented by formula (5) or (6) useful as a production intermediate for a medicine or pesticide from a readily available and inexpensive natural alpha-amino acid as a starting material stereoselectively and stably with a higher optical purity and a lower cost without racemization. This invention can also provide an optically active 5-hydroxyoxazolidine represented by formula (3) and an aminoketone represented by formula (4) as important intermediates for production of the above product as well as preparation processes therefor.