Acta Cryst. (2005). E61, o816-o818  [ doi:10.1107/S1600536805005829 ]

tert-Butyl 1,4-dioxo-3,6-diphenyl-1,2,4,5-tetrahydropyrrolo[3,4-c]pyrrole-2-carboxylate

Y. Imura, T. Senju and J. Mizuguchi

Abstract: The title compound, C₂₃H₂₀N₂O₄, is a soluble precursor (`latent pigment') of diketopyrrolopyrrole pigments. The tert-butoxycarbonyl group is twisted by 78.5  (1)° with respect to the heterocyclic ring system. In the crystal structure, pairs of molecules form centrosymmetric dimers through N-HO intermolecular hydrogen bonds and are stacked in a herring-bone fashion along the a axis.

Online 4 March 2005

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