Sodium hydride → 5-Benzyl-4,6-dioxo-octahydropyrrolo[3,4-b]pyrrole

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Reaction Steps

17.4 g (0.58 mmol) of sodium hydride suspension are reacted with 119 g (0.45 mol) of 1-benzyl-3-(2-chloroethylamino)-pyrrolidine-2,5-dione in 550 ml of absolute dimethylformamide in accordance with the working instructions of Example Ib. After the mixture has been left to stand overnight, it is worked up under aqueous conditions. On purification by chromatography, impurities are first eluted with ethyl acetate and the product is then eluted with ethyl acetate:methanol (3:1) (RF value 0.55) 57.7 g of product (56% of theory) are isolated.

Provenance & Evidence