M. Nishiyama et al., SYNTHESIS OF N-ARYLPIPERAZINES FROM ARYL HALIDES AND PIPERAZINE UNDERA PALLADIUM TRI-TERT-BUTYLPHOSPHINE CATALYST, Tetrahedron letters, 39(7), 1998, pp. 617-620
A Pd/P(t-Bu)(3) catalyst system has revealed very high activity and se
lectivity for the amination of N-(hetero)aryl halides with unprotected
piperazine. A wide variety of N-(hetero)arylpiperazines could be prep
ared using this catalyst. Turnover numbers up to 6400mol/mol have been
obtained. (C) 1998 Elsevier Science Ltd. All rights reserved.