申请人:Moroi Takashi
公开号:US20100036149A1
公开(公告)日:2010-02-11
The present invention provides an industrially advantageous production method of optically active tetrahydroquinolines of formula (1),
which comprises:
1) a step of reacting a β-ketoester of formula (2)
with an amine of formula (3)
to produce an enaminoester of formula (4);
2) a step of subjecting the enaminoester of formula (4) above obtained in 1) to asymmetric hydrogenation to produce an optically active β-amino acid derivative of formula (5);
3) a step of amidating the optically active β-amino acid derivative (5) above obtained in 2) to produce an amide of formula (6);
4) a step of alkoxycarbonylating the amide of formula (6) above obtained in 3) to produce a compound of formula (7);
and
5) a step of subjecting the compound of formula (7) above to cyclization to produce the optically active tetrahydroquinoline of formula (1).
本发明提供了一种工业上优越的光学活性四氢喹啉的生产方法,其包括以下步骤:
1)用式(2)的β-酮酸酯与式(3)的胺反应生成式(4)的烯酰胺酯的步骤;
2)将式(1)中获得的式(4)的烯酰胺酯进行不对称氢化,生成光学活性的β-氨基酸衍生物的步骤;
3)将步骤2)中获得的光学活性β-氨基酸衍生物(5)进行酰胺化,生成式(6)的酰胺的步骤;
4)将步骤3)中获得的酰胺(6)进行烷氧羰基化,生成式(7)的化合物的步骤;
5)将步骤4)中获得的式(7)的化合物进行环化,生成式(1)的光学活性四氢喹啉的步骤。