Enhanced Diastereoselectivity via Confinement: Photoisomerization of 2,3-Diphenylcyclopropane-1-carboxylic Acid Derivatives within Zeolites
摘要:
From the perspective of asymmetric induction, the photochemistry of 24 chiral esters and amides of cis-2,3-diphenylcyclopropane-1-carboxylic acid from excited singlet and triplet states has been investigated within zeolites. The chiral auxiliaries placed at a remote location from the isomerization site functioned far better within a zeolite than in solution. Generally, chiral auxiliaries with an aromatic or a carbonyl substituent performed better than the ones containing only alkyl substituents. A model based on cation-binding-dependent flexibility of the chiral auxiliary accounts for the observed variation in de between aryl (and carbonyl) and alkyl chiral auxiliaries within zeolites. Cation-dependent diastereomer switch was also observed in select examples.
Enhanced Diastereoselectivity via Confinement: Photoisomerization of 2,3-Diphenylcyclopropane-1-carboxylic Acid Derivatives within Zeolites
摘要:
From the perspective of asymmetric induction, the photochemistry of 24 chiral esters and amides of cis-2,3-diphenylcyclopropane-1-carboxylic acid from excited singlet and triplet states has been investigated within zeolites. The chiral auxiliaries placed at a remote location from the isomerization site functioned far better within a zeolite than in solution. Generally, chiral auxiliaries with an aromatic or a carbonyl substituent performed better than the ones containing only alkyl substituents. A model based on cation-binding-dependent flexibility of the chiral auxiliary accounts for the observed variation in de between aryl (and carbonyl) and alkyl chiral auxiliaries within zeolites. Cation-dependent diastereomer switch was also observed in select examples.
[EN] HISTONE DEACETYLASE INHIBITORS AND COMPOSITIONS AND METHODS OF USE THEREOF<br/>[FR] INHIBITEURS D'HISTONE DÉSACÉTYLASE, ET COMPOSITIONS ET PROCÉDÉS POUR LES UTILISER
申请人:CHDI FOUNDATION INC
公开号:WO2012103008A1
公开(公告)日:2012-08-02
Provided are certain histone deacetylase (HDAC) inhibitors of Formula I, compositions thereof, and methods of their use.
提供了某些Formula I的组蛋白去乙酰化酶(HDAC)抑制剂,以及它们的组合物和使用方法。
HISTONE DEACETYLASE INHIBITORS AND COMPOSITIONS AND METHODS OF USE THEREOF
申请人:Luckhurst Christopher A
公开号:US20140163009A1
公开(公告)日:2014-06-12
Provided are certain histone deacetylase (HDAC) inhibitors of Formula I, compositions thereof, and methods of their use.
提供了某些式I的组蛋白去乙酰化酶(HDAC)抑制剂,它们的组成物以及使用它们的方法。
US9765054B2
申请人:——
公开号:US9765054B2
公开(公告)日:2017-09-19
Enhanced Diastereoselectivity via Confinement: Photoisomerization of 2,3-Diphenylcyclopropane-1-carboxylic Acid Derivatives within Zeolites
作者:J. Sivaguru、Raghavan. B. Sunoj、Takehiko Wada、Yumi Origane、Yoshihisa Inoue、Vaidhyanathan Ramamurthy
DOI:10.1021/jo049365i
日期:2004.10.1
From the perspective of asymmetric induction, the photochemistry of 24 chiral esters and amides of cis-2,3-diphenylcyclopropane-1-carboxylic acid from excited singlet and triplet states has been investigated within zeolites. The chiral auxiliaries placed at a remote location from the isomerization site functioned far better within a zeolite than in solution. Generally, chiral auxiliaries with an aromatic or a carbonyl substituent performed better than the ones containing only alkyl substituents. A model based on cation-binding-dependent flexibility of the chiral auxiliary accounts for the observed variation in de between aryl (and carbonyl) and alkyl chiral auxiliaries within zeolites. Cation-dependent diastereomer switch was also observed in select examples.