Acta Cryst. (2003). E59, o1307-o1308 [ doi:10.1107/S1600536803017471 ]
Abstract: The title compound, C26H19ClN4O2S·0.5C4H8O2, was synthesized by the intermolecular [3 + 2]-cycloaddition of azomethine ylide, derived from isatin and sarcosine by a decarboxylative route, and 2-(2-chlorobenzylidene)benzo[4,5]imidazo[2,1-b]thiazol-3-one. In the molecule, the two spiro junctions link a planar 2-oxoindoline ring, a pyrrolidine ring in an envelope conformation, and a planar benzo[4,5]imidazo[2,1-b]thiazol-3(2H)-one ring. Two molecules are connected by N-HO hydrogen bonds to a molecule of dioxane on an inversion center, with an NO distance of 2.823 (2) Å.
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