Date Published: June 01, 2012
Publisher: International Union of Crystallography
Author(s): Hui-Hui Lin, Xiao-Lin Zheng, Sheng-Li Cao.
In the title compound, C26H43N7O, each piperazine ring adopts a chair conformation. Two 1-methylpiperazine rings bond to one Csp3 of the pyrrole ring via the piperazine N atoms, while the third one links to the N atom of the indolin-2-one unit through a flexible ethyl group with an almost syn conformation. In the crystal, molecules are connected through methylene–carbonyl C—H⋯O interactions into an infinite chain along the c axis. The almost parallel arrays are stacked, forming a three-dimensional framework.
For the background to indoline-2,3-dione and its derivatives, see Chiyanzu et al. (2005 ▶); Solomon et al. (2009 ▶); Sriram et al. (2004 ▶). For a related structure, see: Lin et al. (2012 ▶).