Low cost renewable waste rice husks (RH) have been used as a support for grafting of an oxo-vanadium Schiff base via covalent attachment for the oxidation of tertiary amines to N-oxide. The synthesis of the desired RH grafted oxo-vanadium complex involves prior functionalization of the RH support with amino-propyltrimethoxysilane (APTMS) followed by its reaction with salicylaldehyde to get an RH-functionalized
低成本的可再生废稻壳(RH)已被用作通过共价连接将叔胺氧化为N-氧化物而接枝氧
钒席夫碱的载体。所需的RH接枝的氧-
钒络合物的合成涉及将RH载体先用
氨基丙基
三甲氧基硅烷(A
PTMS)进行官能化,然后使其与
水杨醛反应,得到RH官能化的席夫碱,然后将其与
硫酸氧钒反应以得到目标氧代-
钒催化剂。那么合成的催化剂被发现是一种有效的非均相催化剂时,可以得到相应的N-氧化物的优异产率通过用
过氧化氢作为氧化剂氧化叔胺。此外,发现合成的催化剂非常稳定并且在五次运行中显示出一致的活性,而没有任何活性损失。