Palladium-Catalyzed Regio-, Diastereo-, and Enantioselective Allylic Alkylation of Acylsilanes with Monosubstituted Allyl Substrates
作者:Jian-Ping Chen、Chang-Hua Ding、Wei Liu、Xue-Long Hou、Li-Xin Dai
DOI:10.1021/ja106703y
日期:2010.11.10
monosubstituted allyl reagents under Pd-catalyzed asymmetric allylic alkylation reaction conditions to provide products with high regio-, diastereo-, and enantioselectivities. The usefulness of the protocol has been demonstrated by the ready conversion of the allylated products into the corresponding alcohols, esters, and ketones with retention of stereochemistry as well as by the enantioselectivesynthesis of
<b>Conformational Control in Dirhodium(II) Paddlewheel Catalysts Supported by Chalcogen-Bonding Interactions for Stereoselective Intramolecular C–H Insertion Reactions</b>
D2-symmetric dirhodium(II) carboxylate catalysts that bear axially chiral binaphthothiophene δ-amino acidderivatives have been developed. Conformationalcontrol is supported through chalcogen-bonding interactions between sulfur and oxygen atoms in each ligand, providing well-defined and uniform asymmetric environments around the catalytically active Rh(II) centers. These structural properties make