Cesium carbonate → tert-Butyl 5-[4-(4-cyanophenyl)-4-(3,4-dimethoxyphenoxy)butyl]-hexahydropyrrolo[3,4-c]pyrrole-2(1H)-carboxylate

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Reaction Steps

4-(4-Cyanophenyl)-4-(3,4-dimethoxyphenoxy)butyl methanesulfonate (1.12 g, 2.8 mmol; see step (c) above), tert-butyl hexahydropyrrolo[3,4-c]-pyrrole-2(1H)-carboxylate (0.59 g, 2.8 mmol; see Preparation A above) and Cs2CO3 were mixed in CH3CN (30 mL) and stirred at rt for 3 days. The mixture was then filtered and evaporated. Purification on silica (ethyl acetate:MeOH (9:1) eluant) gave 0.9 g (60%) of the sub-title compound.

Provenance & Evidence