Enantioselective biomimetic cyclization of 2′-hydroxychalcones to flavanones
作者:Yan-Lei Zhang、Yong-Qiang Wang
DOI:10.1016/j.tetlet.2014.04.032
日期:2014.5
developed and shown to catalyze the direct and highly enantioselective cyclization of 2′-hydroxychalcones in imitation of the natural process of chalcone cyclization. The straightforward synthetic process occurs under mild reaction conditions, tolerates moisture and air, and gives an enantiomeric excess up to 99%. This approach provides a facile and efficient access to chiral flavanones.
[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.