Palladium-Catalyzed Enantioselective Conjugate Addition of Arylboronic Acids
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چکیده
منابع مشابه
Enantioselective rhodium-catalyzed addition of arylboronic acids to trifluoromethyl ketones.
The catalytic asymmetric 1,2-addition of a series of arylboronic acids to 2,2,2-trifluoroacetophenones is described with high isolated yields (up to 96%) and good enantioselectivities (up to 83% ee) using a rhodium(I)/phosphoramidite catalyst.
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This account describes our laboratory's efforts in the development of a palladium-catalyzed asymmetric conjugate addition of arylboronic acids to cyclic conjugate acceptors. Specifically, we highlight the study of this transformation in the following areas: (a) construction of all-carbon quaternary stereocenters, (b) elucidation of the reaction mechanism,
متن کاملCu-catalyzed stereoselective conjugate addition of arylboronic acids to alkynoates.
The CuOAc-catalyzed reaction of internal alkynoates with arylboronic acids proceeded under mild conditions to yield trisubstituted cinnamates stereoselectively.
متن کاملPalladium-catalyzed asymmetric conjugate addition of arylboronic acids to heterocyclic acceptors.
Flava Flavanone: Asymmetric conjugate additions to chromones and 4-quinolones are reported utilizing a single catalyst system formed in situ from Pd(OCOCF(3))(2) and (S)-tBuPyOX. Notably, these reactions are performed in wet solvent under ambient atmosphere, and employ readily available arylboronic acids as the nucleophile, thus providing ready access to these asymmetric heterocycles (see scheme).
متن کاملEnantioselective palladium-catalysed conjugate addition of arylsiloxanes.
The complex formed from Pd(CH(3)CN)(4)(BF(4))(2) and (R,R)-MeDUPHOS is a highly enantioselective catalyst for the asymmetric conjugate addition of aryltriethylsiloxanes to a variety of unsaturated ketones, lactones and lactams.
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ژورنال
عنوان ژورنال: Organic Letters
سال: 2005
ISSN: 1523-7060,1523-7052
DOI: 10.1021/ol052222d