5-[(4-Methyl­phen­yl)sulfon­yl]-1-phenyl­thio­pyrano[4,3-b]indole-3(5H)-thione di­chloro­methane monosolvate

Rhodium-catalyzed [2+2+2] cyclo­addition of carbon di­sulfide to o,N-dialkynyl­tosyl­anilines gives two isomeric indolo­thio­pyran­thio­nes, a violet and a red isomer. This is the first crystal structure of a red isomer, which crystallizes with one solvent mol­ecule of di­chloro­methane in the asymmetric unit, C(24)H(17)NO(2)S(3)·CH(2)Cl(2). In the extended structure, centrosymmetric pairs of the planar annulated system are arranged in strands and solvent mol­ecules fill the space between the strands. [Image: see text]