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Acta Cryst. (2013). E69, o1023-o1024  [ doi:10.1107/S1600536813014748 ]

(1R*,21S*,22R*,24S*)-Methyl ethyl 2-[23-hydroxy-22,24-diphenyl-8,11,14-trioxa-25-azatetracyclo[,7.015,20]pentacosa-2,4,6,15(20),16,18-hexaen-25-yl]but-2-enedioate

T. H. Hieu, L. T. Anh, A. T. Soldatenkov, O. S. Gorchakova and V. N. Khrustalev

Abstract: The title compound, C40H41NO8, is a product of the reduction of the cyclic carbonyl group of the [gamma]-piperidone subunit of the aza-14-crown-4 ether with subsequent re-esterification of its dimethyl butenoate substituent into a monoethyl monomethyl group. The azacrown macrocycle exhibits a bowl conformation with a dihedral angle of 70.82 (5)° between the benzene rings fused to it. The piperidine ring adopts a chair conformation and the methyl ethyl ethylenedicarboxylate fragment has a cis conformation, with a dihedral angle of 66.51 (7)° between the two carboxylate groups. The ethyl group is disordered over two sites with occupancies of 0.70 (1):0.30 (1). In the crystal, molecules form inversion dimers, via pairs of O-H...O hydrogen bonds, that stack along the a axis.

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