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cif-access (organic compounds)
In the title compounds, C16H19Cl2N3O3 (R1 = H, R2 = COCHMe2), (I), and C20H25Cl2N3O4 (R1 = R2 = COOCHMe2), (II), the imidazolidine rings adopt half-chair conformations. Compound (I) exists in the imidazolidine form. The dihedral angles between the phenyl and imidazolidine rings are 80.95(6)° for (I), and 66.7(2) and 67.5(2)° for (II). In (I), the glide-related molecules are involved in N-HN intermolecular hydrogen bonds.