as the oxidant, catalyzed by a ruthenium pincer complex. This unprecedented reaction protocol liberates hydrogen gas and avoids the use of sacrificial oxidants. A wide variety of primaryamines are selectively transformed to carboxylates or ketones in good to high yields. It is noteworthy that mechanistic experiments and DFT calculations indicate that in addition to serving as the oxidant, water also
β-pinene oxidation by hydrogen peroxide catalyzed by modified niobium-MCM
作者:Jakelyne V. Coelho、Luiz C.A. Oliveira、Flavia C.C. Moura、Patterson P. de Souza、Cesar Augusto Silva、Kenia Barros Batista、Márcio José da Silva
DOI:10.1016/j.apcata.2012.01.032
日期:2012.3
high Lewis and Brønsted acidity is a drawback that always compromises its catalytic performance in oxidation reactions. In this work, treating the niobium catalyst with hydrogen peroxide circumvents this disadvantage and results in a significant increase in the selectivity of the oxidation of β-pinene. In addition, the efficiency of the niobium catalysts supported on MCM was investigated. Nb-MCM//H2O2
尽管固态铌具有较高的表面积,但其较高的路易斯酸和布朗斯台德酸度是一个缺点,始终会损害其在氧化反应中的催化性能。在这项工作中,用过氧化氢处理铌催化剂可避免这一缺点,并导致β-pine烯氧化选择性的显着提高。另外,研究了负载在MCM上的铌催化剂的效率。Nb-MCM // H 2 O 2和Nb-MCM是活性最高的催化剂。在93–97%的底物转化率下,可以实现高达85%的良好选择性。该催化剂可以容易地回收并重复使用几次而不会损失活性。
Simple method for the conversion of terminal olefins to carboxylic acids with the same carbon skeleton
作者:Nguen Kong Hao、M. V. Mavrov、�. P. Serebryakov
DOI:10.1007/bf00952893
日期:1986.1
PERIASAMY M.; NARAYANA C.; ANITHA N., INDIAN J. CHEM., 25,(1986) N 8, 844-846