Design, Synthesis and Usage of a Chiral Lithium Amide Base PDF Download
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Author: Robin Andrew Martin
Publisher:
ISBN:
Category : Amines
Languages : en
Pages : 256
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Book Description
Author: Robin Andrew Martin
Publisher:
ISBN:
Category : Amines
Languages : en
Pages : 256
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Author: Mark Robert Prestly
Publisher:
ISBN:
Category :
Languages : en
Pages : 237
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Author: Nicholas J. Goldspink
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: S. K. Rahman
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Author: Peter O'Brien
Publisher:
ISBN:
Category : Asymmetric synthesis
Languages : en
Pages : 9
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Author: Michiel Barend Eleveld
Publisher:
ISBN:
Category :
Languages : de
Pages : 155
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Author: Lili Ma
Publisher:
ISBN: 9780549689751
Category : Boron
Languages : en
Pages : 296
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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.
Author: Johan Granander
Publisher:
ISBN: 9789162866297
Category : Asymmetric synthesis
Languages : en
Pages : 65
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Author: Jennifer Charlotte Arnall-Culliford
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Daniel Pettersen
Publisher:
ISBN: 9789162864224
Category :
Languages : en
Pages : 67
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