tetrakis(triphenylphosphine) palladium(0) in N,N-dimethyl-formamide T=80°C; 12 h; Inert atmosphere;

1: 2-bromo-5-(methylthio)thiophene With n-butyllithium in diethyl ether; hexane T=-70°C; 2: tributyltin chloride in diethyl ether; hexane T=-70°C;

CH3CH2CH2CH2Li in not given treatment of thiophene deriv. with butyllithium and tributyltinchloride;G. Garbarella, M. Zambianchi, A. Ventola, E. Fabiano, F. Della Sala, G. Gigli, M. Anni., A. Bolognesi, L. Polito, M. Naldi and M Capobianco, Bi oconjugate Chem., 2006, 17, 58;