PALLADIUM - 1,4-BIS-(2-HYDROXY-3,5-DI-TERT-BUTYLBENZYL)PIPERAZINE MEDIATED BUCHWALD-HARTWIG SYNTHESIS OF 2,3-DICHLORO-1, 4-NAPHTHOQUINONE DERIVATIVES AND AN INVESTIGATION OF THEIR DYESTUFF PROPERTIES ON COTTON FABRICS
S. A. EGU *
Department of Chemistry, Kogi State College of Education, Ankpa, Nigeria
L. O. ABUH
Department of Integrated Science, Kogi State College of Education, Ankpa, Nigeria
U. C. OKORO
Department of Pure and Industrial Chemistry, University of Nigeria, Nsukka, Nigeria
*Author to whom correspondence should be addressed.
Palladium - 1,4-bis-(2-hydroxy-3,5-di-tert-butylbenzyl)piperazine mediated Buchwald-Hartwig aminations of 2,3-dichloro-1,4-naphthoquinone give excellent yields of 3-arylamino derivatives of the naphthoquinones. An investigation of their dyestuff properties on cotton fabrics showed varied colour hues, with the mordanted fabrics showing better fastness properties. The dyes were characterised by 1HNMR and TLC.
Keywords: Buchwald-Hartwig aminations, 2,3-dichloro-1, 4-napthoquinone, mordant, fastness, dyeing