Palladium-Catalyzed Oxalyl Amide-Directed γ-Arylation of Aliphatic Amines
摘要:
A method for palladium-catalyzed oxalyl amide-directed arylation of alpha-unsubstituted aliphatic amines with aryl iodides has been developed. A wide variety of aryl iodides are tolerated in this transformation, affording various gamma-arylpropylamine derivatives. Heterocyclic iodides can also be competent reagents in this gamma-C(sp(3))-H bonds transformation.
A protocol for palladium-catalyzed ortho C(sp2)–H alkenylation via a rarely reported seven-membered palladacycle with oxalyl amide as a directing group was reported. The range of olefins was the broadest yet reported for this kind of C–H alkenylation reaction. For example, allyl acetate, allyl alcohol derivatives, acraldehyde, acrylate and acrylonitrile were all tolerated in this C–H transformation. Sequential alkenylation reactions were also achieved to construct the complex olefinated arenes in good yields in one pot.
Palladium-catalyzed oxalyl amide directed ortho-alkynylation of arylalkylamine derivatives via rare six- and seven-membered palladacycles has been reported.