Perrhenic Acid-Catalyzed Dehydration from Primary Amides, Aldoximes,<i>N</i>-Monoacylureas, and α-Substituted Ketoximes to Nitrile Compounds
作者:Yoshiro Furuya、Kazuaki Ishihara、Hisashi Yamamoto
DOI:10.1246/bcsj.80.400
日期:2007.1.15
The dehydration reaction of primary amides is one of the most fundamental methods for the synthesis of nitriles, and the development of environmentally benign catalytic reaction processes is needed. We surveyed a variety of metal catalysts and found that perrhenic acid was extremely effective for the dehydration of not only primary amides but also aldoximes. Typically, 1 mol % of perrhenic acid gave
伯酰胺的脱水反应是合成腈类最基本的方法之一,需要开发环境友好的催化反应工艺。我们调查了各种金属催化剂,发现高铼酸不仅对伯酰胺而且对醛肟的脱水都非常有效。通常,在共沸回流条件下,在甲苯或均三甲苯中除去水,1 mol%的高铼酸由酰胺或醛肟得到相应的腈。此外,高铼酸是一种非常有效的催化剂,用于将 α-取代的酮肟贝克曼裂解成官能化的腈。这种新的催化系统无需进一步修改即可应用于腈的克级合成。