Acta Cryst. (2003). E59, o1025-o1027  [ doi:10.1107/S1600536803013825 ]

1-Benzyl-5-(1-naphthylmethylene)piperidinespiro-3,3'-1'-methyl-4'-(1-naphthyl)pyrrolidinespiro-2',3''-indole-2'',4-dione-diethyl ether (1/0.75)

X.-F. Li, Y.-Q. Feng, X.-F. Hu and G. Wang

Abstract: The title compound, C₄₄H₃₇N₃O₂·0.75(C₂H₅)₂O, was synthesized by the intermolecular [3  +  2] cycloaddition of the azomethine ylide, derived from isatin and sarcosine by a decarboxylative route, and 1-benzyl-3,5-bis-naphth-1-ylmethylene-piperidin-4-one. In the molecule, the two spiro junctions link a planar 2-oxindole ring, a pyrrolidine ring in an envelope conformation and a piperidone in a boat conformation. Molecules are connected into chains along the a direction by O-HN hydrogen bonds, with an ON distance of 2.944  (3)  Å.

Online 30 June 2003

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