Ethyl 3,4-bis(acetyloxy)-2-(4-methoxyphenyl)pyrrolidine-1-carboxylate

• Main Authors: Dallasta Pedroso, Sofia, Caracelli, Ignez, Zukerman-Schpector, Julio, Soto-Monsalve, Monica, De Almeida Santos, Regina H., Correia, Carlos Roque D., Llanes Garcia, A. L., Tiekink, Edward R. T. *
• Format: Article
• Language: English
• Published: International Union of Crystallography 2020
• Subjects: QD Chemistry
• Online Access: http://eprints.sunway.edu.my/1510/1/Tiekink%20iucrdata%205%202020%20x201228.pdf; http://eprints.sunway.edu.my/1510/; http://doi.org/10.1107/S2414314620012286
• Institution: Sunway University

The title pyrrolidine compound, C18H23NO7, is a tetra-substituted species in which the five-membered ring has a twisted conformation with the twist occurring in the C—C bond bearing the adjacent acet­yloxy substituents; the Cm—Ca—Ca—Cp torsion angle is −40.76 (18)° [m = methyl­ene, a = acet­yloxy and p = phen­yl]. The N atom, which is sp2-hybridized [sum of bond angles = 359.4°], bears an ethyl­carboxyl­ate substitutent and is connected to a methyl­ene-C atom on one side and a carbon atom bearing a 4-meth­oxy­phenyl group on the other side. Minor disorder is noted in the ethyl­carboxyl­ate substituent as well as in one of the acet­yloxy groups; the major components of the disorder have site occupancies of 0.729 (9) and 0.62 (3), respectively. The most notable feature of the mol­ecular packing is the formation of helical, supra­molecular chains aligned along the b-axis direction whereby the carbonyl-O atom not involved in a disordered residue accepts C—H...O inter­actions from methyl­ene-H and two-C atom separated methine-H atoms to form a six-membered {...HCCCH...O} synthon.