Tin tetrachloride → HCID 19036964, compound

Participants

Reaction Steps

A solution of 8.14 ml of 4-fluorobenzoyl chloride and 450 ml of dry DCM was cooled in an ice/salt bath to 0° C. To the stirred solution was added 7.74 ml of tin (IV) chloride. The mixture was stirred at -5° C. to 0° C. for 10 minutes after which was added 18.0 g of 2-[(3-methyl-1H-indol-1-yl]-1H-isoindole-1,3-(2H)dione (Example 10b). The reaction mixture was stirred at 0° C. for 1.5 hours, allowed to warm to room temperature for 2 hours, cooled again in an ice bath, poured onto ice, extracted twice with ethyl acetate, washed with water, brine, dried over sodium sulfate, filtered and concentrated to a yellow solid. Chromatography (15% acetone/heptane) provided a solid weighing 56.8 g. Recrystallization from ethyl alcohol gave 21.1 g of the product, m.p. 227°-228° C.

Provenance & Evidence