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Synthesis of diphosphite ligands derived from glucopyranoside and their application in the Cu-catalyzed asymmetric 1,4-addition of organozinc to enones

✍ Scribed by Qing-Lu Zhao; Man Kin Tse; Lai-Lai Wang; Ai-Ping Xing; Xianxing Jiang

Book ID
108284644
Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
585 KB
Volume
21
Category
Article
ISSN
0957-4166

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Synthesis of New Chiral Aryl Diphosphite
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## Abstract New chiral aryl diphosphite ligands based on the pyranoside backbones of glucose and galactose were prepared. These ligands were tested in the Cu‐catalyzed asymmetric conjugate addition of diethylzinc to cyclic enones with up to 88% ee. The stereoselectivity was found to be dependent on

Synthesis of Chiral Bulky Monophosphite
Synthesis of Chiral Bulky Monophosphite Ligands and Their Application in Cu-Catalyzed Asymmetric Conjugate Addition of Diethylzinc to Cyclic Enones
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A series of new bulky monophosphite ligands were synthesized from axially chiral BINOL and highly sterically hindered adamantanecarbonyl chloride. These ligands were applied to the Cu-catalyzed asymmetric 1,4-conjugate addition of diethylzinc to cyclic enones and were found to have moderate enantios