Epoxidation of olefins using cis-dioxomolybdenum complexes as catalysts
作者:D.D. Agarwal
DOI:10.1016/0304-5102(88)80078-6
日期:1988.2
Cis-dioxomolybdenum complexes, having tetradentate and tridentate ligands, as catalyst with t-butylhydroperoxide gave epoxides from olefins in good yield. The catalysts, except MoO2(apac), have been found to withstand the oxidative conditions. The steric environment due to the ligand around the metal center plays a significant role in the epoxidation of substituted olefins, viz., isoprene and 1,2-dimethyl-1
Alumina-supported Mn(II), Co(II), Ni(II) and Cu(II) bis(2-hydroxyanil)acetylacetone complexes as catalysts for the oxidation of cyclohexene with tert-butylhydroperoxide
作者:M Salavati-Niasari、S.H Banitaba
DOI:10.1016/s1381-1169(03)00128-6
日期:2003.7
New Mn(II), Co(II), Ni(II) and Cu(II) complexes of a tetradentate Schiff base ligand [bis(2-hydroxyanil)acetylacetone], "2-[1-methyl-3-[(2-hydroxyphenyl)imino]butylidene}amino]phenol", H(2)haacac, have been prepared and characterized by elemental analyses, IR and conductometry. The results suggest that the Schiff base is a bivalent anion with tetradentate ONNO donors derived from the phenolic oxygen and azomethine nitrogen. The formulae was found to be [M(haacac)] for the 1: 1 non-electrolytic complexes. Alumina-supported [M(haacac)] complexes catalyze the oxidation of cyclohexene with tert-butylhydroperoxide (TBHP). The major products of the reaction were 2-cyclohexene-1-ol(-OH), 2-cyclohexene-1-one (C=O) and 2-cyclohexene-1-(tert-butylperoxy) (-(OOBu)-Bu-t). The influence of temperature, solvent and time for the oxidation reaction has been studied. The selectivity of 2-cyclohexene-1-(tert-butylperoxy) varied with reaction temperature. Mn(haacac)-alumina shows significantly higher catalytic activity than other alumina-supported complexes. (C) 2003 Elsevier Science B.V. All rights reserved.
Abu-El-Wafa, S. M.; Issa, R. M., Bulletin de la Societe Chimique de France, 1991, # 6, p. 805 - 808
作者:Abu-El-Wafa, S. M.、Issa, R. M.
DOI:——
日期:——
Abu-El-Wafa, S. M.; Issa, R. M., Bulletin de la Societe Chimique de France, 1990, # 1, p. 64 - 67
作者:Abu-El-Wafa, S. M.、Issa, R. M.
DOI:——
日期:——
Manganese(III) bis(2-hydroxyanil)acetylacetonato complex as effective catalyst for acylation of alcohols, amines and phenols with acetic anhydride
Acylation of alcohols, amines and phenols with acetic anhydride in an efficient manner using [bis(2-hydroxyanil)acetylacetonato]manganese(III)chloride, [Mn(haacac)Cl], as a catalyst. Using this method acylation of a primary NH2 group in the presence of secondary NH and primary OH have been achieved with high selectivity. (c) 2005 Elsevier B.V. All rights reserved.