Nanoceria as a recyclable catalyst/support for the cyanosilylation of ketones and alcohol oxidation in cascade
作者:Francisco Garnes-Portolés、Miguel Ángel Rivero-Crespo、Antonio Leyva-Pérez
DOI:10.1016/j.jcat.2020.09.032
日期:2020.12
show that commercially available nanoceria catalyzes the cyanosilylation of different ketones (21 examples) at temperatures between 0 and 50 °C, in high yields, under solventless conditions if required. The nanoceria network atoms act in a cooperative way to provide a bifunctional acid-base solid catalyst for the cyanosilylation reaction. The amorphization of nanoceria during reaction, due to acid release
羰基化合物的氰基甲硅烷基化反应是有机合成中生成氰醇的基本反应。酮特别不希望氰基硅烷的添加,并且需要催化剂的作用,尽管已将许多可溶性布朗斯台德酸和路易斯酸用于此任务,但在公开文献中很难找到能够进行反应的催化固体。在这里,我们表明,如果需要,在0至50°C之间的温度下,可商购的纳米氧化铈在0至50°C之间的温度下以高收率催化不同酮的氰基硅烷化反应(21个实例)。纳米二氧化铈网络原子以协作方式起作用,为氰基硅烷化反应提供了一种双功能的酸基固体催化剂。由于释放酸,反应过程中纳米氧化铈的无定形不会妨碍催化活性,实际上,