PROCESS FOR PRODUCTION OF MONO-SUBSTITUTED ALKYLATED COMPOUND USING ALDIMINE OR DERIVATIVE THEREOF
申请人:Maruoka Keiji
公开号:US20090054679A1
公开(公告)日:2009-02-26
The present invention provides a method for producing asymmetrical mono-substituted alkylated compounds of α-amino acids that are represented by a specific formula, using an aldimine-type Schiff base. In the method of the present invention, the process of alkylating an aldimine-type Schiff base in a medium in the presence of an optically-active quaternary ammonium salt phase-transfer catalyst and an inorganic base is initiated, and subsequently the reaction is quenched at a time earlier than a time for completion of the stoichiometric reaction of the alkylation reaction, so that a mono-substituted alkylated product with high optical purity can be obtained.
OPTICALLY ACTIVE QUATERNARY AMMONIUM SALT HAVING AXIAL ASYMMETRY AND PROCESS FOR PRODUCING -AMINO ACID AND DERIVATIVE THEREOF WITH THE SAME
申请人:NAGASE & COMPANY, LTD.
公开号:EP1870403A1
公开(公告)日:2007-12-26
The present invention provides a chiral phase-transfer catalyst of the following formula (I):
The compound (I) can be produced by reacting a 2,2'-dimethylene bromide-1,1'-biphenyl derivative, which can be produced through comparatively small number of steps, with an easily available secondary amine.
Optically active quaternary ammonium salt having axial asymmetry and process for producing alpha-amino acid and derivative thereof with the same
申请人:NAGASE & COMPANY, LTD.
公开号:EP2484667A1
公开(公告)日:2012-08-08
The present invention provides a chiral phase-transfer catalyst of the following formula (I):
The compound (I) can be produced by reacting a 2,2'-dimethylene bromide-1,1'-biphenyl derivative, which can be produced through comparatively small number of steps, with an easily available secondary amine.
OPTICALLY ACTIVE QUATERNARY AMMONIUM SALT HAVING AXIAL ASYMMETRY AND PROCESS FOR PRODUCING ALPHA-AMINO ACID AND DERIVATIVE THEREOF WITH THE SAME
申请人:Maruoka Keiji
公开号:US20090270614A1
公开(公告)日:2009-10-29
The present invention provides a chiral phase-transfer catalyst of the following formula (I):
The compound (I) can be produced by reacting a 2,2′-dimethylene bromide-1,1′-biphenyl derivative, which can be produced through comparatively small number of steps, with an easily available secondary amine.