title: Diethyl 1-(4-methyl-phen-yl)-3-phenyl-5-oxopyrrolidine-2,2-dicarboxyl-ate.
abstract: In the title compound, C(23)H(25)NO(5), the lactam ring adopts an envelope conformation and both eth-oxy-carbonyl side chains show an s-cis conformation: one is nearly planar, the dihedral angle between CO(2) and OCH(2)CH(3) groups being 7.95 (14)° and the other is almost orthogonal, the C-O-C-C torsion angle being 85.33 (9)°. Dimers related by inversion symmetry are stabilized by C-H⋯O hydrogen bonds. The crystal structure is consolidated by weak intermolecular C-H⋯O inter-actions. Weak intra-molecular inter-actions of the same kind also occur.
authors: Jayanta Kumar
authors: JK
authors: Ray
authors: Gopa
authors: G
authors: Barman
authors: M
authors: M
authors: Canle L
authors: M I
authors: MI
authors: Fernández P
authors: J A
authors: JA
authors: Santaballa
references: Bioorg Med Chem. 1994 Dec;2(12):1417-21
references: 7788305
references: Acta Crystallogr A. 2008 Jan;64(Pt 1):112-22
references: 18156677
references: Acta Crystallogr Sect E Struct Rep Online. 2010 Jul 24;66(Pt 8):o2103
references: 21588395
references: Acta Crystallogr D Biol Crystallogr. 2009 Feb;65(Pt 2):148-55
references: 19171970
references: Acta Crystallogr C. 2004 Mar;60(Pt 3):o163-5
references: 15004370
references: Chem Commun (Camb). 2005 Jun 28;(24):2995-3001
references: 15959566