Showing papers on "Selective reduction published in 1984"
TL;DR: Borohydride exchange resin (BER) exhibited selectivity in the reduction of α, β-unsaturated carbonyl compounds to the corresponding unsaturated alcohols as mentioned in this paper.
59 citations
TL;DR: In this paper, a three-step synthesis of 5-aminolevulinic acid by using acyl cyanides with zinc in acetic acid in the presence of excess acetic anhydride leads to Nacetyl-α-aminoketones in good yields.
33 citations
TL;DR: In this article, the selectivity in the catalytic reduction of nitroarylalkylnitriles with hydrazine and metal catalysts was studied, and the results showed that it is not optimal.
26 citations
TL;DR: In this article, the catalytic effect of B-MeO-9-BBN and (MeO)3B in enhancing the reactivity of lithium borohydride toward the reduction of other representative functional groups has been explored.
Abstract: : The rate of reduction of esters by lithium borohydride is considerably enhanced by a number of Lewis acids of boron. The remarkable catalytic effect of B-MeO-9-BBN and (MeO)3B in enhancing the reactivity of lithium borohydride toward the reduction of other representative functional groups has been explored. Alkyl halides are not reduced. Epoxides are readily reduced in 0.25 h. Carboxylic acids are reduced rapidly up to 50%, with further reaction being very slow. Acid salts are not reduced. Tertiary amides are slowly reduced in the presence of 100 mol % of B-zMeO-9-BBn, 40% in 24 h. Nitriles, under the same conditions, are reduced completely in 5H. Pyridine and nitrobenzene are not significantly affcted by this system. Sulfides, sulfoxides, and sulfones are also inert. However, tosylates are reduced rapidly. These results indicate the utility of this catalytic effect for the ready reduction of esters by lithium borohydride, as well as the ability of this reducing system to tolerate many substituents in such reductions.
19 citations
TL;DR: Aldehydes are selectively reduced to the alcohols in the presence of ketones with 8-oxyquinoline dihydroboronite and boron trifluoride etherate as a catalyst.
12 citations
TL;DR: Reduction des chlorures d'acetyle, isobutyryle, valeryle and benzoyle avec les complexes hydruro des Cr(CO) 4 L et W(CO 4 L (L=CO ou PR 3 ).
Abstract: Reduction des chlorures d'acetyle, isobutyryle, valeryle et benzoyle avec les complexes hydruro des Cr(CO) 4 L et W(CO) 4 L (L=CO ou PR 3 )
3 citations
Journal Article•
1 citations
01 Jan 1984
1 citations