Studies on the asymmetric cycloaddition of 2-azaallyl anions with alkenes
A preliminary survey of strategies for the asymmetric cycloaddition of nonstabilized 2-azaallyllithiums with alkenes is reported. The chiral diamine (-)-sparteine exerted little, if any, absolute stereocontrol. The attachment of a chiral auxiliary to the anion was more successful, leading to the first example of an asymmetric cycloaddition of a 2-azaallyllithium (24 to 25, 98% e.e.).
Pearson, William H,Stevens, Erland P,Aponick, Aaron
p. 7361 - 7365
(2007/10/03)
Models for Asymmetric Cycloadditions
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Houge, C.,Frisque-Hesbain, A. M.,Mockel, A.,Ghosez, L.,Declercq, J. P.,et al.
p. 2920 - 2921
(2007/10/02)
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