- Hydroformylation-hydrogenation and hydroformylation-acetalization reactions catalyzed by ruthenium complexes
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In this work, the catalytic activity of ruthenium II and III complexes containing chloride, pyridine, phosphine and CO ligands was investigated in the hydroformylation – hydrogenation and hydroformylation – acetalization reactions. The complexes mer-[RuCl3(dppb)(H2O)](1), mer-[RuCl3(dppb)(4-Vpy)](2), mer-[RuCl3(dppb)(4-tBupy)](3), mer-[RuCl3(dppb)(py)](4), mer-[RuCl3(dppb)(4-Phpy)](5), mer-[RuCl3(dppb)(4-Mepy)](6), cis-[RuCl2(CO)2(dppb)](7), trans-[RuCl2(CO)2(dppb)](8), RuCl3·xH2O(9), [RuCl2(PPh3)3](10) and [RuCl2(PPh3)2(dppb)](11) were used as supplied or synthesized as previously described in the literature {Where PPh3?=?triphenylphosphine, dppb?=?1,4-bis(diphenylphosphino)butane, py?=?pyridine, 4-Mepy?=?4-methylpyridine, 4-Vpy?=?4-vinylpyridine, 4-tBupy?=?4-tert-butylpyridine and 4-Phpy?=?4-phenylpyridine}. These complexes were used as a pre-catalysts in a hydroformylation catalytic system to produce C[sbnd]C, C[dbnd]O and C[sbnd]O bonds, where 1-decene resulted in a formation of respective alcohol and dimethyl acetals. Several reactions were performed in order to find the best reaction conditions presenting the best conversion (64% after 24?h). The 1-decene was also used as a substrate in two type tandem reactions labeled as: hydroformylation – hydrogenation (HH) and hydroformylation – acetalization (HA) reactions. The relationship between Ru – catalyst/substrate was 1:100, without free ligands or additives, in a controlled temperature and pressure. All the products of catalytic reactions HH and HA were analyzed by CG-FID with good yields.
- Rodrigues, Claudia,Delolo, Fabio G.,Norinder, Jakob,B?rner, Armin,Bogado, André L.,Batista, Alzir A.
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p. 586 - 592
(2016/12/16)
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- Highly efficient acetalization of carbonyl compounds catalyzed by anilin-aldehyde resin salts
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A mild procedures for the syntheses of ethylene acetals and dimethyl acetals from the corresponding aldehydes and ketones catalyzed by 1mol% of anilinealdehyde resin salts are described. This method is also useful for the synthesis of dimethyl acetals of diaryl ketones.
- Tanemura, Kiyoshi,Suzuki, Tsuneo
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supporting information
p. 797 - 799
(2015/06/22)
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- METHOD FOR PRODUCING ALDEHYDE FUNCTIONAL COMPOUNDS
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The invention relates to a method for producing aldehyde functional compounds by a cross-metathesis reaction of an olefinic compound having at least one hydroxy group and at least one C—C double bond with at least one at least monounsaturated fatty acid or at least one at least monounsaturated fatty acid derivative, in the presence of a metathesis catalyst at a maximum temperature of 180° C. and in the presence of at least one reagent that acts as a protective group-forming compound in relation to the aldehyde group of the aldehyde functional compounds.
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Page/Page column 6-7
(2012/02/03)
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- Silica gel-supported metallic sulfates catalyzed chemoselective acetalization of aldehydes under microwave irradiation
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Silica gel - supported metallic sulfates are found to be efficient catalysts for the protection of both aromatic and aliphatic aldehydes as 1,3- dioxolanes under microwaves in solvent-free conditions. Due to the neutral reaction conditions, this method is compatible with acid sensitive substrates.
- Yadav,Reddy, B. V. Subba,Srinivas,Ramalingam
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p. 701 - 703
(2007/10/03)
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