Palladium-Catalyzed Coupling/Cyclization Reactions of Allene-Substituted Lactams
摘要:
omega-(2,3-Butadienyl)lactams react with aryl iodides in the presence of n-Bu4NCl, K2CO3 and a catalytic amount of Pd(PPh3)(4) to give bicyclic enamides resulting from attack of nitrogen on the central carbon and transfer of the aryl group to the terminal carbon atom of the allene. (C) 1997 Elsevier Science Ltd.
Palladium-Catalyzed Coupling/Cyclization Reactions of Allene-Substituted Lactams
摘要:
omega-(2,3-Butadienyl)lactams react with aryl iodides in the presence of n-Bu4NCl, K2CO3 and a catalytic amount of Pd(PPh3)(4) to give bicyclic enamides resulting from attack of nitrogen on the central carbon and transfer of the aryl group to the terminal carbon atom of the allene. (C) 1997 Elsevier Science Ltd.
A series of allenic tosylamides have been prepared and shown to undergo palladium(II)-catalyzed cyclization in the presence of lithium bromide and a copper(II) salt to give pyrrolidines. Palladium-catalyzed 1,2-oxidation of allenic lactams in the presence of LiBr and p-benzoquinone was also studied. (C) 2000 Elsevier Science Ltd. All rights reserved.
Palladium-Catalyzed Coupling/Cyclization Reactions of Allene-Substituted Lactams
omega-(2,3-Butadienyl)lactams react with aryl iodides in the presence of n-Bu4NCl, K2CO3 and a catalytic amount of Pd(PPh3)(4) to give bicyclic enamides resulting from attack of nitrogen on the central carbon and transfer of the aryl group to the terminal carbon atom of the allene. (C) 1997 Elsevier Science Ltd.