Activation of C-H and C-Cl bonds in the reactions of 2-substituted benzothiazolines with [RhCl(PPh3)(3)]

摘要

The reactions of 2-phenylbenzothiazoline or 2-(2,6-dichlorophenyl)benzothiazoline with [RhCl(PPh3)(3)] afforded the neutral rhodium(III) complexes [RhCl(S-N-C)(PPh3)(2)] (1) (S-N-C = C6H4SN=CHC6H42-) and [RhCl(S-N-C(Cl))(PPh3)(2)] (2) (S-N-C(Cl)= C6H4SN=CHC6H3Cl2-) through the activation of C-H and C-Cl bonds, respectively. The crystal structure of complex 1 has been determined and the rhodium atom is in a distorted-octahedral environment. To evaluate whether C-CI activation is more favourable than C-H activation, 2-(2-chlorophenyl)benzothiazoline was reacted with [RhCl(PPh3)(3)]. The reaction shows that C-Cl bond activation is preferred in this system. (C) 2000 Elsevier Science S.A. All rights reserved. [References: 18]