nanocatalyst has been reported for the tetrahydropyranylation/depyranylation of a wide variety of alcohols and phenols by changing the solvent medium. Also, the protection of aldehydes as acylals using Ac2O in the presence of catalytic amount MNPs-PSA in good to high yields at room temperature under solvent-free conditions is described. After completing the reaction, the catalyst was easily separated from the
已经报道了负载在Fe 3 O 4磁性纳米颗粒(MNPs-P
SA)上的 N- 丙基
氨基磺酸作为一种有效的和可磁重复使用的纳米催化剂,可以通过改变溶剂介质将其用于多种醇和
酚的
四氢吡喃基化/脱
吡喃基化。此外,还描述了在无溶剂条件下,在室温下,在催化量的MNPs-P
SA存在下,使用Ac 2 O以高至高收率保护醛作为酰基的醛。反应完成后,借助外部磁场可以很容易地将催化剂从反应混合物中分离出来,并连续使用几次,而不会明显降低其催化效率。