title: [Dimethyl 3-benzyl-2-(4-methyl-2,5-dioxoimidazolidin-1-yl)butanedioate].
abstract: There are two symmetry-independent formula units of the title compound, dimethyl 3-benzyl-2-(4-methyl-2,5-dioxoimidazolidin-1-yl)butanedioate, C17)H20N2O6, per cell. The two symmetry-independent molecules differ in their configuration and are diastereomers. This structural study confirms a new side reaction during the synthesis of seven-membered cyclopeptides. The stereochemistry of both diastereomers has been established.
authors.affiliation: Laboratoire des Aminoacides, Peptides et Protéines, Université Montpellier I et II, Faculté de Pharmacie, UMR CNRS 5810, 15 Avenue Charles Flahault, 34060 Montpellier CEDEX 2, France. rolland@colombes.pharma.univ-montp1.fr
authors.forename: M
authors.initials: M
authors.lastname: Rolland
authors.forename: A
authors.initials: A
authors.lastname: Jenhi
authors.forename: J P
authors.initials: JP
authors.lastname: Lavergne
authors.forename: J
authors.initials: J
authors.lastname: Martinez
authors.forename: A
authors.initials: A
authors.lastname: Hasnaoui