[EN] FORMATION OF CHIRAL 4-CHROMANONES USING CHIRAL PYRROLIDINES IN THE PRESENCE OF ACIDS<br/>[FR] FORMATION DE 4-CHROMANONES CHIRALES À PARTIR DE PYRROLIDINES CHIRALES, EN PRÉSENCE D'ACIDES
申请人:DSM IP ASSETS BV
公开号:WO2015001027A1
公开(公告)日:2015-01-08
The present invention relates to a synthesis of chromanones or chromanes in a stereospecific matter in view of the 2-position in the chromanone or chromane ring. It has been found that this synthesis is particularly possible in the presence of a chiral compound of a specific type and of at least one Bransted acid or in the presence a specific chiral compound having a Bransted acid functional group in the molecule.
[EN] FORMATION OF CHIRAL 4-CHROMANONES USING CHIRAL PYRROLIDINES IN THE PRESENCE OF PHENOLS OR THIOPHENOLS<br/>[FR] FORMATION DE 4-CHROMANONES CHIRALES UTILISANT DES PYRROLIDINES CHIRALES EN LA PRÉSENCE DE PHÉNOLS OU DE THIOPHÉNOLS
申请人:DSM IP ASSETS BV
公开号:WO2015001029A1
公开(公告)日:2015-01-08
The present invention relates to a synthesis of chromanones or chromanes in a stereospecific matter in view of the 2-position in the chromanone or chromane ring. It has been found that this synthesis is particularly possible in the presence of a chiral compound of formula of a specific type and of at least one phenol or thiophenol.
[EN] FORMATION OF CHIRAL 4-CHROMANONES USING CHIRAL PYRROLIDINES IN THE PRESENCE OF UREAS OR THIOUREAS<br/>[FR] FORMATION DE 4-CHROMANONES CHIRALES AU MOYEN DE PYRROLIDINES CHIRALES EN PRÉSENCE D'URÉES OU DE THIOURÉES
申请人:DSM IP ASSETS BV
公开号:WO2015001030A1
公开(公告)日:2015-01-08
The present invention relates to a synthesis of chromanones or chromanes in a stereospecific matter in view of the 2-position in the chromanone or chromane ring. It has been found that this synthesis is particularly possible in the presence of a chiral compound of formula of a specific type and of at least one urea or thiourea.
[EN] FORMATION OF CHIRAL 4-CHROMANONES USING CHIRAL PYRROLIDINES<br/>[FR] FORMATION DE 4-CHROMANONES CHIRALES AU MOYEN DE PYRROLIDINES CHIRALES
申请人:DSM IP ASSETS BV
公开号:WO2015001031A1
公开(公告)日:2015-01-08
The present invention relates to a synthesis of chromanones or chromanes in a stereospecific matter in view of the 2-position in the chromanone or chromane ring. It has been found that this synthesis is particularly possible in the presence of a chiral compound of formula of a specific.
Optically active or racemic aminal derivatives, process for preparing same and for converting same to alpha-hydroxyaldehydes
申请人:SUMITOMO CHEMICAL COMPANY, LIMITED
公开号:EP0011417A1
公开(公告)日:1980-05-28
An optically active or racemic a-hydroxyaldehyde of formula
wherein R, represents a C6-C14 aryl group, C1-C10 alkyl group, C1-C10 alkenyl group, C2-C10 alkynyl group, C2-C14 aralkyl group, or a group containing a functional group in the organic portion of said groups and R: represents a C1-C10 alkyl group, C1-C10 alkenyl group, C1-C10 alkynyl group, C7-C14 aralkyl group, C6-C14 aryl group or a group containing a functional group in the organic portion of these groups, which is an important intermediate for preparation of pharmaceuticals and agricultural chemicals and can be prepared by reacting an optically active or racemic compound of formula
wherein A represents a C6-C14 aryl group or a C1-C4 alkyl or alkoxy group- or halogen-substituted C6-C14 aryl group and R is as defined above, with a Grignard reagent, and thereafter hydrolyzing the reaction product.
The compound of formula (1) above can for example be prepared by reaction of an arylglyoxal with an optically active or racemic 2-iN-substituted aminomethyl)pyrroiidine or by reacting a Grignard reagent with an optically active or racemic. diazabicyclooctane derivative which itself can be prepared from a glyoxylate ester or glyoxylate ester hemiacetal and a 2(-N-substituted aminomethyl)pyrrolidine.