60% Sodium hydride dispersion in mineral oil (44 mg 1.1 mmol) was added to a stirred solution of 7-trityloxyindole (Example 12a) (375 mg, 1.0 mmol) in dimethylformamide (4 ml). The mixture was stirred for 10 minutes at room temperature then a suspension of 3-[2(E)-(7-chloroquinolin-2-yl)ethenyl]benzyl chloride (Example 6a) (251 mg, 0.80 mmol) in dimethylformamide (4 ml) was added and the mixture was stirred for a further 3 hours. The dark solution was poured onto saturated ammonium chloride solution and extracted with dichloromethane. The extract was dried and evaporated under high vacuum and the residue was chromatographed on silica in ethyl acetate-hexane (1:5).
