Showing papers on "Selective reduction published in 1977"
TL;DR: Titanium tetrachloride is a very effective catalyst for the addition of lithium aluminum hydride to olefins as mentioned in this paper, and it provides a convenient laboratory method for the selective reduction of nonconjugated diolefin or the selective preparation of haloole fins from dio lefins.
26 citations
22 citations
TL;DR: In this article, a formic acid reduction selective at α, β-double bond of conjugated nitriles is described, where the TEAF reagent (triethylamine-formic acid azeotrope) is used.
Abstract: Formic acid reduction selective at α, β-double bond of conjugated nitriles is described. Selective reduction of carbon-carbon double bond conjugated with two cyano groups or with both cyano and other electron-withdrawing group has been demonstrated with several examples by the use of the TEAF reagent (triethylamine-formic acid azeotrope) in N, N-dimethylformamide.
19 citations
TL;DR: In this paper, a rapid and convenient method for selective reduction of sulfoxides to corresponding sulfides in the mixture with other sulfinyl compounds, i.e., sulfinic esters and t-butyl thiolsuifinates, with (CF3CO)2O-H2S system is described.
Abstract: A rapid and convenient method for selective reduction of sulfoxides to the corresponding sulfides in the mixture with other sulfinyl compounds, i.e., sulfinic esters and t-butyl thiolsuifinates, with (CF3CO)2O–H2S system is described.
13 citations
4 citations
Patent•
30 Mar 1977
TL;DR: In this article, an efficient catalysts for the selective reduction of NOx by using reducing gas such as CO,NH3 was proposed. But it is not suitable for the use of CO 2.
Abstract: PURPOSE:Efficient catalysts for the selective reduction of NOx by using reducing gas such as CO,NH3.
3 citations
TL;DR: In this article, various catalysts containing oxides of Fe, Cr, Cu, Al, Ti, and Mg were prepared from the precipitates formed by the reaction of sulfates with NH3 aq.
Abstract: For the purpose to obtain catalysts with high activity and durability for the reduction of nitrogen oxide with NH3, various catalysts containing oxides of Fe, Cr, Cu, Al, Ti, and Mg were prepared from the precipitates formed by the reaction of sulfates with NH3 aq.The catalytic activity and the effect of SO r were tested by using a flow reactor (I. D.: 12.0 mm) under atmospheric pressure and at 250-500°C.The average diameter of the granular catalysts was 1.0 mm. Inlet gas concentration was 500 ppm NO-667 ppm NH3-0 or 1000 ppm SO2-5% O2-10% 1120-N2 balanced and the total gas flow rate was 1000 Ncm'imin (space velocity: 1.1 x 105 hr-) toward O.55 cm (bulk volume) of the catalysts.On the basis of these results, the catalyst, Fe, (SO4)3-ce-Fe3O2-iO3(Fe2O2-TiO3 system), was found to be highly active both in the presence and in the absence of SOS. Furthermore, it was proved that the addition of MoO3 or WO, to this iron catalyst increases the stability against SO r and selectivity for the reduction of NO.On the basis of the study of the reduction of NO with NH, or the oxidation of NH3 with O2- over the catalysts pretreated with pure H2 or 1000 ppm NH3-N2 mixture, it was confirmed that SO4 in the catalysts promotes the stable and selective reduction of NO. Also, only TiO2 of anatase type is active and the addition of MoO8 or WO, to this TiO2 was found to be very effective for the reduction of NO.
1 citations
1 citations
Patent•
25 Jul 1977
1 citations
TL;DR: In this article, the optimum conditions were found for the selective reduction of the carbonyl group in ethyl 2-thienyl glyoxylate to the CH2 group with the formation of E2-THNacetate using Re2S7 as the catalyst.
Abstract: Using Re2S7 as the catalyst, the optimum conditions were found for the selective reduction of the carbonyl group in ethyl 2-thienylglyoxylate to the CH2 group with the formation of ethyl 2-thienylacetate.
TL;DR: In this article, the synthesis of 2-isopropylamino-1-(5-hydroxy-4H-pyran-4-on-2-yl)ethanol and corresponding 4pyridone analogues are described.
Abstract: The syntheses of 2-isopropylamino-1-(5-hydroxy-4H-pyran-4-on-2-yl)ethanol and the corresponding 4-pyridone and 1-methyl-4-pyridone analogues are described. The selective reduction of an aliphatic n...