TY - JOUR AU - Cívicos, José F.; Coimbra, Juliana S. M.; Costa, Paulo R. R. TI - Solvent-Free Synthesis of Salen Ligands and Pd(II)– and Cu(II)–Salen Complexes: Their Use in the Oxidation of α-Tetralones to α-Naphthols SN - 0039-7881 SN - 1437-210X PY - 2017 JO - Synthesis JF - Synthesis LA - EN VL - 49 IS - 17 SP - 3998 EP - 4006 ET - 2017/06/27 DA - 2017/08/21 KW - copper–Salen complexes KW - palladium–Salen complexes KW - trans-cyclohexane-1,2-diamine KW - solvent-free KW - mechanochemistry KW - aromatization reaction AB - Racemic trans-cyclohexane-1,2-diamine was allowed to react with eleven aldehydes with different patterns of substitution at the aromatic ring, in the absence of solvent, by manually milling the reagents. The corresponding imines were obtained in moderated to high chemical yields, in only 10 minutes of reaction. A one-pot, two-step preparation of stable complexes of selected imines with Pd(OAc)2 and Cu(OAc)2 and the use of these complexes as catalysts in the aromatiz­ation of methyl 1-oxo-1,2,3,4-tetrahydronaphthalene-2-carboxylate to the corresponding methyl 1-hydroxynaphthalene-2-carboxylates, is also reported. PB - © Georg Thieme Verlag DO - 10.1055/s-0036-1588446 UR - http://www.thieme-connect.com/products/ejournals/abstract/10.1055/s-0036-1588446 ER -