Crystal structure of ethyl 1',1''-dimethyl-2'',3-dioxo-3H-di-spiro-[benzo[b]thio-phene-2,3'-pyrrolidine-2',3''-indoline]-4'-carboxyl-ate.

M P Savithri,A Subbiahpandi,M Suresh,R Raja,R Raghunathan

doi:10.1107/s2056989015002042

Abstract

In the title compound, C23H22N2O4S, the pyrrolidine ring has an envelope conformation with the spiro C atom, shared with the indoline ring system, as the flap. The mean planes of the benzothiophene and indoline ring systems are inclined to the mean plane of the pyrrolidine ring by 88.81 (8) and 79.48 (8)°, respectively, and to each other by 68.12 (5)°. In the crystal, molecules are linked via C—H⋯O hydrogen bonds, forming chains propagating along [001].

Highlights

In the title compound, C23H22N2O4S, the pyrrolidine ring has an envelope conformation with the spiro C atom, shared with the indoline ring system, as the flap
The mean planes of the benzothiophene and indoline ring systems are inclined to the mean plane of the pyrrolidine ring by 88.81 (8) and 79.48 (8), respectively, and to each other by 68.12 (5)
Molecules are linked via C—H O hydrogen bonds, forming chains propagating along [001]

Summary

Introduction

C23H22N2O4S, the pyrrolidine ring has an envelope conformation with the spiro C atom, shared with the indoline ring system, as the flap. Absorption correction: multi-scan (SADABS; Bruker, 2004) H-atom parameters constrained max = 0.40 e Å3 Molecules are linked via C—H O hydrogen bonds, forming chains propagating along [001]. For various biological activities of indole derivatives, see: Harris & Uhle (1960); Ho et al (1986); Stevenson et al (2000).

Results

Conclusion