TY - JOUR AU - Bakos, József AU - OROSZ, A AU - HEIL, B AU - LAGHMARI, M AU - LHOSTE, P AU - SINOU, D TI - RHODIUM(I) SULFONATED-BDPP CATALYZED ASYMMETRIC HYDROGENATION OF IMINES IN AQUEOUS ORGANIC 2-PHASE SOLVENT SYSTEMS JF - JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS J2 - J CHEM SOC CHEM COMMUN PY - 1991 IS - 23 SP - 1684 EP - 1685 PG - 2 SN - 0022-4936 DO - 10.1039/c39910001684 UR - https://m2.mtmt.hu/api/publication/1191029 ID - 1191029 LA - English DB - MTMT ER - TY - JOUR AU - Békássy, Sándor AU - CSERI, T TI - INVESTIGATION OF THE REACTIVITY OF METAL NITRATES ADSORBED TO MONTMORILLONITE JF - MAGYAR KÉMIAI FOLYÓIRAT (1895-1996) J2 - MAGY KÉM FOLY VL - 97 PY - 1991 IS - 8 SP - 339 EP - 343 PG - 5 SN - 0025-0155 UR - https://m2.mtmt.hu/api/publication/2649983 ID - 2649983 AB - The activity of montmorillonite-supported iron(III) nitrate and copper(II) nitrate was investigated in model oxidation and nitration reactions. It was established that, in contrast to literature data, even the less stable iron-reagent can be stored for weeks without substantial loss of activity. For complete oxidation of aromatic alcohols to carbonyl compounds there is no need for a significant excess of the reagents proposed in the literature. With an amount of iron-reagent less than the equivalent to the alcohol, the oxidation yield achieved was higher than proportional. This fact may place in doubt the adequacy of the accepted reaction mechanism. The rate of oxidation is markedly influenced by the nature of the solvent, the reaction is the fastest in benzene. The copper-reagent, which has not been used for this purpose before, is a good oxidant too. However, the oxidation yield with this reagent reaches that obtained with the iron reagent at a temperature by about 30-degrees-C higher. In the nitration of phenols the temperature could be increased to 60-degrees-C with the iron-reagent, so we have succeeded in reducing the reaction time to some hours. LA - Hungarian DB - MTMT ER - TY - JOUR AU - Kéki, Sándor AU - Beck, Mihály TI - Oscillatory kinetics of the permanganate oxidation of oxalic acid? JF - REACTION KINETICS AND CATALYSIS LETTERS J2 - REACT KINET CATAL L VL - 44 PY - 1991 IS - 1 SP - 75 EP - 77 PG - 3 SN - 0133-1736 DO - 10.1007/BF02068387 UR - https://m2.mtmt.hu/api/publication/1002138 ID - 1002138 LA - English DB - MTMT ER - TY - JOUR AU - Kollár, László AU - Sandor, P AU - Szalontai, Gábor TI - TEMPERATURE-DEPENDENCE OF THE ENANTIOSELECTIVE HYDROFORMYLATION WITH PTCL2[(S)-BINAP] + SNCL2 CATALYST AND THE DYNAMIC NMR-STUDY OF THE CATALYTIC PRECURSOR JF - JOURNAL OF MOLECULAR CATALYSIS J2 - J MOL CATAL VL - 67 PY - 1991 IS - 2 SP - 191 EP - 198 PG - 8 SN - 0304-5102 DO - 10.1016/0304-5102(91)85046-5 UR - https://m2.mtmt.hu/api/publication/1049593 ID - 1049593 LA - English DB - MTMT ER - TY - JOUR AU - Kreisz, J AU - Ungvary, F AU - Sisak, Attila AU - Markó, László TI - Kinetics of the Ring-opening Carbonylation of Ethyloxirane with Hydrido Tetracarbonyl Cobalt JF - JOURNAL OF ORGANOMETALLIC CHEMISTRY J2 - J ORGANOMET CHEM VL - 417 PY - 1991 IS - 1-2 SP - 89 EP - 97 PG - 9 SN - 0022-328X DO - 10.1016/0022-328X(91)80163-E UR - https://m2.mtmt.hu/api/publication/1092482 ID - 1092482 AB - The rate of CO uptake in the reaction of HCo(CO)4 with ethyloxirane, which gives (3-hydroxypentanoyl)cobalt tetracarbonyl as the major product in an n-octane/methyl isobutyl ketone solvent mixture at 15-degrees-C, is first order with respect to HCo(CO)4 and ethyloxirane, and independent of the concentration of Co(CO)4- or CO. The reaction is faster with DCo(CO)4. A preequilibrium ion pair formation and a subsequent rate-determining internal substitution, followed by fast CO insertion, accounts for these results. LA - English DB - MTMT ER - TY - JOUR AU - Skodáné Földes, Rita AU - Kollár, László AU - Heil, B AU - Galik, G AU - Tuba, Z AU - Arcadi, A TI - A POSSIBLE WAY FOR THE INTRODUCTION OF ALPHA-FORMYL-ETHYL-SUBSTITUENTS AND BETA-FORMYL-ETHYL-SUBSTITUENTS INTO THE STEROID-SKELETON VIA COUPLING AND CARBONYLATION REACTIONS JF - TETRAHEDRON-ASYMMETRY J2 - TETRAHEDRON ASYMMETR VL - 2 PY - 1991 IS - 7 SP - 633 EP - 634 PG - 2 SN - 0957-4166 DO - 10.1016/S0957-4166(00)86115-7 UR - https://m2.mtmt.hu/api/publication/1049592 ID - 1049592 LA - English DB - MTMT ER - TY - JOUR AU - Skodáné Földes, Rita AU - Kollár, László AU - Heil, B TI - HOMOGENEOUS CATALYTIC HYDROSILYLATION OF THE C=C DOUBLE-BOND IN THE PRESENCE OF TRANSITION-METAL CATALYSTS JF - JOURNAL OF ORGANOMETALLIC CHEMISTRY J2 - J ORGANOMET CHEM VL - 408 PY - 1991 IS - 3 SP - 297 EP - 304 PG - 8 SN - 0022-328X DO - 10.1016/0022-328X(91)83201-E UR - https://m2.mtmt.hu/api/publication/1049594 ID - 1049594 LA - English DB - MTMT ER - TY - JOUR AU - Vizi-Orosz, A AU - Markó, László TI - Reduction of Aromatic Nitro-compounds with NaBH4 Catalyzed by Nickel Complexes of o-Aminothiophenol Schiff Base Derivatives JF - TRANSITION METAL CHEMISTRY J2 - TRANSIT METAL CHEM VL - 16 PY - 1991 IS - 2 SP - 215 EP - 217 PG - 3 SN - 0340-4285 UR - https://m2.mtmt.hu/api/publication/1092484 ID - 1092484 AB - The nickel complexes of Schiff bases formed from omicron-aminothiophenol and alpha-dicarbonyl compounds, Ni(omicron-SC6H4N = CRCR = NC6H4S-omicron) (R = H, Me, Ph) (1a-c), catalyse the reduction of aromatic nitro compounds by NaBH4. The reduced species [Ni(omicron-SC6H4N = CHCH = NC6H4S-omicron)]- (2) and [Ni(omicron-SC6H4NHCH2CH = NC6H4S-omicron)]- (3) were identified as intermediates in the catalytic cycle. LA - English DB - MTMT ER - TY - JOUR AU - Horváth, István Tamás TI - HYDROFORMYLATION OF OLEFINS WITH THE WATER-SOLUBLE HRH(CO)[P(M-C6H4SO3NA)3]3 IN SUPPORTED AQUEOUS-PHASE - IS IT REALLY AQUEOUS JF - CATALYSIS LETTERS J2 - CATAL LETT VL - 6 PY - 1990 IS - 1 SP - 43 EP - 48 PG - 6 SN - 1011-372X DO - 10.1007/BF00764051 UR - https://m2.mtmt.hu/api/publication/1059788 ID - 1059788 LA - English DB - MTMT ER - TY - JOUR AU - MADIPUSKAS, M AU - László, Pál AU - PELYVAS, IF AU - SZTARICSKAI, F TI - CONVENIENT C-3 OXIDATION OF DEOXY AND AMINODEOXY SUGARS JF - ORGANIC PREPARATIONS AND PROCEDURES INTERNATIONAL J2 - ORG PREP PROCED INT VL - 22 PY - 1990 IS - 5 SP - 605 EP - 611 PG - 7 SN - 0030-4948 UR - https://m2.mtmt.hu/api/publication/2438441 ID - 2438441 LA - English DB - MTMT ER -