Azobisisobutyronitrile → HCID 24784534, compound

Participants

Reaction Steps

2-(4,4-Dimethyl-2-oxo-1,3-oxazolidin-3-yl)-4,5-dihydronaphtho[1,2-d][1,3]thiazole-7-carbonitrile (0.65 g, 2.0 mmol), prepared in step 5 of Example 6, N-bromosuccinamide (0.39 g, 2.2 mmol) and a catalytic amount of 2,2′-azobis(2-methylproprionitrile) were stirred in carbontetrachloride (68 mL) at reflux for 4 h. The reaction was diluted with ethyl acetate and washed with 10% sodium thiosulfate. The layers were separated and the organic layer was dried over anhydrous MgSO4, filtered and concentrated to give 0.64 g of crude product. Purification of the crude product on silica gel using a stepwise gradient of 6:1 to 1:1 hexane:ethyl acetate as the eluent gave 0.35 g of product that contained an impurity. Recrystallization from ethyl acetate afforded the title compound (0.02 g, 3%), mp>230° C.

Provenance & Evidence