A rare oxidation of camphene to acid and aldehyde in the presence of Lacunar Keggin heteropoly salts
作者:Castelo Bandane Vilanculo、Márcio José da Silva、Sukarno Olavo Ferreira、Milena Galdino Teixeira
DOI:10.1016/j.mcat.2019.110589
日期:2019.11
with hydrogen peroxide. Under reaction conditions (i.e., 333 K, air atmosphere, CH3CN solution), camphene (1) was selectively oxidized by H2O2, generating two rare products; camphene aldehyde (1a) and camphenylic acid (1b), which have attractive olfactive properties. Notably, these uncommon compounds were obtained with the camphene preserving their carbon skeletal. Among the lacunar Keggin heteropolyacid
在这项工作中,合成了含有钠作为抗衡阳离子的单伯拉金Keggin杂多酸盐,并作为过氧化氢对樟脑氧化的催化剂进行了评估。在反应条件下(即333 K,空气气氛,CH 3 CN溶液),camp烯(1)被H 2 O 2选择性氧化,生成两种稀有产物。具有吸引人的嗅觉特性的樟脑醛(1a)和可苯甲酸(1b)。值得注意的是,这些不常见的化合物是在the烯保持其碳骨架的情况下获得的。在腔隙性Keggin杂多酸盐中,Na 7 PW 11 O 39腔隙盐是对氧化产物最有活性和选择性的,将the烯完全转化为(1a)和(1b)产物。催化剂负载,氧化剂::烯摩尔比和反应温度允许控制(1a)/(1b)比例。