Crystal structure of ethyl 2′′,3-dioxo-7′,7a'-dihydro-1′H,3H,3′H-dispiro[benzo[b]thiophene-2,6′-pyrrolo[1,2-c]thiazole-5′,3′′-indoline]-7′-carboxylate

Acta Crystallographica Section E: Crystallographic Communications

M. Suresh¹  R. Raghunathan¹  A. SubbiahPandi²  R. Raja²  M. P. Savithri³ 

[1] Department of Organic Chemistry, University of Madras, Guindy Campus, Chennai 600 025, India;Department of Physics, Presidency College (Autonomous), Chennai 600 005, India;Department of Physics, Queen Mary's College (Autonomous), Chennai 600 004, India;

关键词: crystal structure;    dispiro;    benzothiophene;    thiazole;    pyrrolidine;    indoline;    hydrogen bonds;    inversion dimers;   

DOI  :  10.1107/S2056989015002030

来源: DOAJ

【 摘 要 】

In the title compound, C23H20N2O4S2, the central pyrrolidine ring adopts an envelope conformation with the spiro C atom, shared with the benzothiophene ring system, as the flap. The thiazole ring has a twisted conformation on the S—C bond, where the C atom is that closest to methine C atom. The mean planes of the benzothiophene and indoline ring systems are inclined to the mean plane of the central pyrrolidine ring by 82.75 (8) and 80.03 (8)°, respectively, and to each other by 61.49 (6)°. In the crystal, molecules are linked via pairs of N—H...O hydrogen bonds, forming inversion dimers with an R22(8) ring motif. The dimers are linked via C—H...O and C—H...N hydrogen bonds, forming a three-dimensional structure. The ethoxycarbonyl group is disordered over two orientations, with an occupancy ratio of 0.717 (12):0.283 (12).

【 授权许可】

Unknown