Received 8 March 2010
In the title compound, C24H21ClN4O2S, the two adjacent spiro junctions link an almost planar (r.m.s. deviation = 0.017 Å) 2-oxindole ring, a hexahydro-1H-pyrrolizine ring and a tetrahydroimidazo[2,1-b]thiazole ring. In the crystal, inversion dimers linked by pairs of N-HN hydrogen bonds occur, generating an R22(16) loop.
Data collection: CrystalClear (Rigaku, 2001); cell refinement: CrystalClear; data reduction: CrystalClear; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXL97.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: HB5356 ).
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