Catalytic Asymmetric Intramolecular Aminopalladation: Improved Palladium(II) Catalysts
- 11 March 2005
- journal article
- Published by American Chemical Society (ACS) in The Journal of Organic Chemistry
- Vol. 70 (7) , 2859-2861
- https://doi.org/10.1021/jo047763f
Abstract
Cobalt oxazoline palladacyclic (COP) complex 4 containing acetate as a bridging ligand is an excellent catalyst for asymmetric intramolecular aminopalladation to synthesize 4-vinyloxazolidin-2-ones in 91−98% ee. In contrast to previously reported Pd(II) catalysts, COP-OAc (4) promotes the asymmetric cyclization of (Z)-allylic N-tosylcarbamates without prior activation by silver salts.Keywords
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