Author: Kuiwang WuPublisher:
ISBN:
Category : Amides
Languages : en
Pages : 116
Book Description
Chiral Lithium Amide on Soluble Polymer Support and Structure of Mixed Aggregates of Chiral Lithium Amides
Author: Kuiwang WuPublisher:
ISBN:
Category : Amides
Languages : en
Pages : 116
Book Description
Polymer-supported Chiral Lithium Amide Bases and Structural Investigation on Bis(amino)boron Enolates
Author: Lili MaPublisher:
ISBN: 9780549689751
Category : Boron
Languages : en
Pages : 296
Book Description
Chiral lithium amide bases (CLAB's) have been successfully used in asymmetric organic reactions in the past decades. Despite the increasing use of polymeric reagents in organic synthesis, the number of papers describing polymer-supported chiral lithium amide bases (pCLAB's) is limited. The pCLAB's have several advantages such as easy separation and reuse. Additionally, the "polymeric effect" often plays an important role in organic reactions, such as physical separation of aggregates and steric interference. All these prompted us to study the structure and reactions of pCLAB's. Polymer-supported chiral amines were effectively prepared from amino acid derivatives and Merrifield resin. Treatment of polymer-supported amines with n-butyllithium gave the corresponding pCLAB's which were tested in asymmetric deprotonation reactions of prochiral ketones. Trimethylsilyl enol ethers were obtained in up to 82% ee at room temperature without additives. The polymer-supported chiral lithium amides can be readily recycled and reused without significant loss of reactivity and selectivity.
Syntheses, Structures and Applications of Mixed Aggregates Containing Chiral Lithium Amides and Alkyllithiums Or Lithium Enolates
Author: Chengzao SunPublisher:
ISBN:
Category : Aggregation (Chemistry)
Languages : en
Pages : 400
Book Description
Canadian Journal of Chemistry
Author: Publisher:
ISBN:
Category : Chemistry
Languages : en
Pages : 1058
Book Description
Crystal Structures of Mixed Lithium Enolate-lithium Amide Aggregates, Sodium Dithioester, Thioester and Oxygen Ester Enolates and the Synthesis of Two New Secondary Chiral Amines Possessing C2 Symmetry
Author: Mark Jon HintzePublisher:
ISBN:
Category :
Languages : en
Pages : 420
Book Description
Asymmetric Butylation of Aldehydes Mediated by Chiral Lithium Amides and Investigations of Lithium Amide Aggregates in Solution
Author: Jia LiuPublisher:
ISBN:
Category : Aldehydes
Languages : en
Pages : 190
Book Description
Chiral Lithium Amides
Author: Mark Robert PrestlyPublisher:
ISBN:
Category :
Languages : en
Pages : 237
Book Description
Free and Polymer-supported Chiral Lithium Amides
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Free and Polymer-supported Chiral Lithium Amides
Author: Agnieszka Ulaczyk LesankoPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Design, Synthesis and Usage of a Chiral Lithium Amide Base
Author: Robin Andrew MartinPublisher:
ISBN:
Category : Amines
Languages : en
Pages : 256
Book Description
