E. Brenner et al., Nickel-mediated amination chemistry. Part 2: Selective N-arylation or N,N '-diarylation of piperazine, TETRAHEDR L, 41(16), 2000, pp. 2881-2884
The 2,2'-bipyridine liganded Ni catalyst has revealed a good selectivity in
the mono arylation of piperazine starting from aryl chlorides allowing a s
elective and efficient synthesis of N-arylpiperazines using stoichiometric
amounts of reagents. The preparation of N,N'-diaryl substituted piperazines
is also described. (C) 2000 Elsevier Science Ltd. All rights reserved.