Highly Regioselective Ruthenium-Catalyzed Allylic Alkylations of Chelated Enolates
作者:Anton Bayer、Uli Kazmaier
DOI:10.1021/ol102106v
日期:2010.11.5
Ru-catalyzed allylicalkylations are a highly interesting alternative to Pd-catalyzed reactions. Ru complexes show a high tendency for regioretention, especially for branched and (Z)-configured substrates, and they do not undergo isomerization of the allyl intermediates formed. Therefore, (Z)-substrates conserve their olefin geometry, and a perfect chirality transfer is observed with optically active
Palladium-Catalyzed Selective Anti<i>-</i>Markovnikov Oxidation of Allylic Esters
作者:Jia Jia Dong、Martín Fañanás-Mastral、Paul L. Alsters、Wesley R. Browne、Ben L. Feringa
DOI:10.1002/anie.201301809
日期:2013.5.17
An aldol alternative: The palladium(II)‐catalyzed anti‐Markovnikov oxidation of allylicesters to aldehydes at room temperature provides a viable alternative to valuable cross aldol products. High regioselectivity towards the aldehyde product was achieved using the ester protecting group for the allylic alcohol. Rapid isomerization and the much higher rate of oxidation of the branched isomer result