65559-66-2Relevant academic research and scientific papers
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.
SYNTHESE RADICALAIRE D'ANALGESIQUES POTENTIELS: ARYL-4 PIPERIDINES SUBSTITUEES EN 2 ET BENZOMORPHANES
Stella, L.,Raynier, B.,Surzur, J. M.
, p. 2843 - 2854 (2007/10/02)
The synthesis of a series of 3-aryl 5-hexenyl amines and the cyclisations of the corresponding N-chloroamines are described.When the ring closure results from the amino radical addition to the ethylenic double bond, 2-chloromethyl 4-phenyl piperidines are obtained.These compounds lead by intramolecular Friedel-Crafts reaction to varied substituted 6,7-benzomorphanes.When the phenyl ring is substituted with a methoxyl group, the cyclisation proceeds via homolytic aromatic substitution and 4-allyl tetrahydroquinolines are formed.
