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Perillo","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Carlos","family":"de los Santos","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Alejandra","family":"Salerno","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"5187","reference":[{"key":"10.3987\/COM-02-9623-1","doi-asserted-by":"crossref","unstructured":"1. A. Salerno, M. Hedrera, N. B. D\u2019Accorso, M. Martins Alho, and I. A. Perillo, J. Heterocycl. Chem., 2000, 37, 57.","DOI":"10.1002\/jhet.5570370109"},{"key":"10.3987\/COM-02-9623-2","doi-asserted-by":"crossref","unstructured":"2. A. Salerno, G. Buldain, and I. A. Perillo, J. Heterocycl. Chem., 2001, 38, 849 and references therein.","DOI":"10.1002\/jhet.5570380407"},{"key":"10.3987\/COM-02-9623-3","unstructured":"3. In azacycloalkanes, the shielding of hydrogens alpha to nitrogen atoms by a lone electron pair in trans and a methyl group in cis has been widely documented."},{"key":"10.3987\/COM-02-9623-4","unstructured":"4. E. Brever and D. Melomar, J. Org. Chem., 1973, 38, 1601; P. J. Chievers, T. A. Crabb, and R. O. Williams, Tetrahedron, 1968, 24, 4411; R. O. Hutchins, L. D. Kopp, and E. L. Eliel, J. Am. Chem. Soc., 1968, 90, 7174; J. B. Lambert, R. G. Keske, R. E. Carhart, and A. P. Jovanovich, J. Am. Chem. Soc., 1967, 89, 3161; J. B. Lambert and R. G. Keske, Tetrahedron Lett., 1969, 25, 2023."},{"key":"10.3987\/COM-02-9623-5","doi-asserted-by":"crossref","unstructured":"5. V. M. S. Gil and W. von Philipsborn, Magn. Reson. Chem.,1989, 27, 409.","DOI":"10.1002\/mrc.1260270502"},{"key":"10.3987\/COM-02-9623-6","unstructured":"6. J. P. Albrand, A. Cogne, D. Gagnaire, and J. B. Robert, Tetrahedron, 1971, 27, 2453."},{"key":"10.3987\/COM-02-9623-7","doi-asserted-by":"crossref","unstructured":"7. D. Tytgat and M. Gelbcke, Bull. Soc. Chim. Belg., 1989, 98, 243.","DOI":"10.1002\/bscb.19890980403"},{"key":"10.3987\/COM-02-9623-8","unstructured":"8. Proton coupled and decoupled 13C-NMR spectra of compound (7) were recorded as model for the series: \u03b4 (ppm) 50.4 ppm (C4,5), 55.2 (CH2Ar), 56.8 (CH3O), 88.5 (C2), 113.5, 126.7, 128.0, 128.5, 130.5, 132.0, 139,2 and 159.8 (aromatics)."},{"key":"10.3987\/COM-02-9623-9","unstructured":"9. C. Chapuis, A. Gauvreau, A. Klaebe, A. Lettes, and J. J. Perie, Tetrahedron, 1974, 30, 1383."},{"key":"10.3987\/COM-02-9623-10","doi-asserted-by":"crossref","unstructured":"10. W. B. Jennings, Chem. Rev., 1975, 75, 307.","DOI":"10.1021\/cr60295a003"},{"key":"10.3987\/COM-02-9623-11","unstructured":"11. A similar effect is observed for 3-imidazolidinones with a C2-aryl group trans to a N1-benzyl substituent."},{"key":"10.3987\/COM-02-9623-12","unstructured":"12. L. Southwick, J. A. Fitzgerald, and G. E. Milliman, Tetrahedron Lett., 1965, 18, 1247."},{"key":"10.3987\/COM-02-9623-13","doi-asserted-by":"crossref","unstructured":"13. J. F. Lambert, Top. Stereochem., 1971, 6, 19.","DOI":"10.1007\/BF00146057"},{"key":"10.3987\/COM-02-9623-14","unstructured":"14. Proton coupled and decoupled 13C-NMR spectra of compound (10) were recorded as model for the series. \u03b4 (ppm): 47.0 (C5), 49.8 (C4), 56.8 (CH2Ar), 81.6 (C2), 113.2, 121.1, 127.2, 127.7, 128.1, 128.3, 128.7, 128.9, 138.5, 140.2 and 144.8 (aromatics)."},{"key":"10.3987\/COM-02-9623-15","unstructured":"16. J. H. Billman, J. Y. C. Ho, and L. R. Caswell, J. Am. Chem. Soc., 1952, 17, 1375."},{"key":"10.3987\/COM-02-9623-16","unstructured":"16. J. H. Billman, J. Y. C. Ho, and L. R. Caswell, J. Am. Chem. Soc., 1952, 17, 1375."},{"key":"10.3987\/COM-02-9623-17","unstructured":"17. W. L. Wilson and M. J. LeBelle, J. Pharm. 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