The present invention provides a method for easily producing an (R)-3-[4-(trifluoromethyl)phenylamino]-pentanoic acid amide derivative useful for an intermediate for pharmaceutical products, particularly an inhibitor of a cholesteryl ester transfer protein (CETP) from easily available raw materials.
In the present invention, (S)-N-[4-(trifluoromethyl)phenyl]-3-hydroxypentanoic acid amide prepared from easily available raw materials leads a production of (R)-4-ethyl-1-[4-(trifluoromethyl)phenyl]-2-azetidinone to give (R)-3-[4-(trifluoromethyl)phenylamino]-pentanoic acid amide. Furthermore, (R)-4-ethyl-1-[4-(trifluoromethyl)phenyl]-2-azetidinone is reacted with a carbamic acid ester to give an (R)-3-[4-(trifluoromethyl)phenylamino]-pentanoic acid amide derivative.
Method for producing an optically active tetrahydroquinoline
申请人:Moroi Takashi
公开号:US20060122225A1
公开(公告)日:2006-06-08
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).
Asymmetric reductive amination of keto acid derivatives for producing amino acid derivatives
申请人:Matsumura Kazuhiko
公开号:US20070142443A1
公开(公告)日:2007-06-21
The present invention relates to a process for producing amino acid derivatives such as optically active β-amino acid in short steps with good yield and high optical purity, which comprises reacting a keto acid of the formula (1):
wherein R
1
is hydrogen, an optionally substituted hydrocarbon, etc.; R
2
is a spacer; and R
3
is an optionally substituted alkoxy, etc., or a salt thereof, with ammonia or an amine or a salt thereof in the presence of a chiral catalyst and in the presence or absence of an acid and/or a fluorine-containing alcohol, to give an amino acid derivative of the formula (2):
wherein Q is a group formed by removing one hydrogen atom from ammonia or an amine; X′ is an acid and/or a fluorine-containing alcohol; and b is 0 or 1.
METHOD FOR PRODUCING AN OPTICALLY ACTIVE TETRAHYDROQUINOLINE
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).
Method for producing (R)-3-[4-(trifluoromethyl) phenylamino]-pentanoic acid amide derivative
申请人:Pfizer Inc.
公开号:US07223859B2
公开(公告)日:2007-05-29
The present invention provides a method for easily producing an (R)-3-[4-(trifluoromethyl)phenylamino]-pentanoic acid amide derivative useful for an intermediate for pharmaceutical products, particularly an inhibitor of a cholesteryl ester transfer protein (CETP) from easily available raw materials. In the present invention, (S)-N-[4-(trifluoromethyl)phenyl]-3-hydroxypentanoic acid amide prepared from easily available raw materials leads a production of (R)-4-ethyl-1-[4-(trifluoromethyl)phenyl]-2-azetidinone to give (R)-3-[4-(trifluoromethyl)phenylamino]-pentanoic acid amide. Furthermore, (R)-4-ethyl-1-[4-(trifluoromethyl)phenyl]-2-azetidinone is reacted with a carbamic acid ester to give an (R)-3-[4-(trifluoromethyl)phenylamino]-pentanoic acid amide derivative.