Rice husk: Introduction of a green, cheap and reusable catalyst for the protection of alcohols, phenols, amines and thiols
作者:Farhad Shirini、Somayeh Akbari-Dadamahaleh、Ali Mohammad-Khah、Ali-Reza Aliakbar
DOI:10.1016/j.crci.2013.01.018
日期:2014.2
eco-friendly protocol for the chemoselective protection of benzylic and primary and less hindered secondary aliphatic alcohols and phenols as trimethylsilyl ethers and different types of amines as N-tert-butylcarbamates is developed using rice husk (RiH) as the catalyst. This reagent is also able to catalyze the acetylation of alcohols, phenols, thiols and amines with acetic anhydride. Easy work-up, relatively
摘要 以稻壳 (RiH) 为原料,开发了一种温和、高效、环保的方案,用于化学选择性保护苄基和伯和受阻较小的仲脂肪醇和酚作为三甲基甲硅烷基醚以及不同类型的胺作为 N-叔丁基氨基甲酸酯。催化剂。该试剂还能够催化醇、酚、硫醇和胺与乙酸酐的乙酰化反应。该方法的显着特点是后处理简单、反应时间相对较短、收率高、成本低、催化剂的可用性和可重复使用性是该方法的显着特点,可被认为是保护醇、酚的最佳和通用方法之一、硫醇和胺。此外,