147666-56-6Relevant articles and documents
Synthetic applications of the β-lithiation of β-Aryl secondary amides: Diastereoselective and enantioselective substitutions
Lutz, Gary P.,Du, Hua,Gallagher, Donald J.,Beak, Peter
, p. 4542 - 4554 (2007/10/03)
The sequence of β-lithiation and electrophilic substitution of β-aryl secondary amides is reported. The lithiations occur regioselectively at the β-position, and the resulting lithiated intermediates can be reacted with a wide range of electrophiles to give substituted products. Reactions of β-lithiated amides bearing an α-substituent provide substituted products with high diastereoselectivity. Electrophilic substitutions of β-lithiated N-methylamides in the presence of the chiral diamine (-)-sparteine provide highly enantioenriched products. The methodology is used to synthesize enantioenriched β-aryl β-substituted amides, acids, and lactones.
