Asymmetric Allylation of Methyl Ketones by Using Chiral Phenyl Carbinols
作者:Lutz F. Tietze、Tom Kinzel、Thomas Wolfram
DOI:10.1002/chem.200900062
日期:2009.6.15
To methyl or to alkyl? High induced facial selectivities and excellent yields are obtained in the allylation of aliphatic methyl ketones by using a structurally simple phenylbenzyl auxiliary to give the corresponding homoallylic ethers (see scheme). The transferred auxiliary has a very good protecting quality and can easily be removed.
First Enantioselective Total Synthesis of (+)-(<i>R</i>)-Pinnatolide Using an Asymmetric Domino Allylation Reaction
作者:Lutz F. Tietze、Thomas Wolfram、Julian J. Holstein、Birger Dittrich
DOI:10.1021/ol301932d
日期:2012.8.17
An efficient totalsynthesis of (+)-(R)-Pinnatolide is described. As a key step an asymmetric multicomponent domino allylation reaction of methyl levulinate is used to form the quaternary stereogenic center in a highly selective way.