(-)-Myrtenyl N,N-Diisopropylcarbamate: Stereochemistry of Lithiation and Electrophilic Substitution Directed by Dynamic Kinetic Diastereoisomer Resolution
作者:Thérèse Hémery、Jochen Becker、Roland Fröhlich、Dieter Hoppe
DOI:10.1002/ejoc.201000390
日期:2010.7
(-)-Myrtenyl N,N-diisopropylcarbamate was lithiated by butyllithium in the presence of achiral and chiral ligands, followed by quench with several electrophiles. The ratio of diastereomeric products allows conclusions regarding the configurational stability of both diastereomeric lithium intermediates and the influence of kinetic diastereoisomer resolution in the substitution step.
(-)-Myrtenyl N,N-diisopropylcarbamate 在非手性和手性配体存在下被丁基锂锂化,然后用几种亲电子试剂淬灭。非对映体产物的比例可以得出关于非对映体锂中间体的构型稳定性和取代步骤中动力学非对映异构体拆分的影响的结论。