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Chiral diselenide ligands for the asymmetric copper-catalyzed conjugate addition of Grignard reagents to enones

✍ Scribed by Antonio L Braga; Sandra J.N Silva; Diogo S Lüdtke; Roberta L Drekener; Claudio C Silveira; Joao B.T Rocha; Ludger A Wessjohann

Publisher
Elsevier Science
Year
2002
Tongue
French
Weight
159 KB
Volume
43
Category
Article
ISSN
0040-4039

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✦ Synopsis

The copper-catalyzed conjugate addition of Grignard reagents to enones in the presence of chiral diselenide oxazoline ligands has been studied and found to provide good yields and useful levels of asymmetric induction.

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New chiral ligands for the asymmetric copper catalyzed conjugate addition of Grignard reagents to enones
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The copper catalyzed conjugate addition of n-butyl Grignard to enones in the presence of chiral ferrocenyl phosphine oxazoline ligands has been studied and found to provide useful levels of asymmetric induction. A comparison of the ferrocene derived ligands 3 and 6 with the corresponding phenyl deri

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