经由N-硼基酰胺中间体的酰胺高效转化合成腈类化合物
Efficient Synthesis of Nitrile Compounds through Amide Conversion via N-Boroamide Intermediates
李洋 1董亚楠 2李跃辉2
作者信息
- 1. 中国科学院兰州化学物理研究所 苏州实验室 羰基合成与选择氧化国家重点实验室 兰州 730000;中国科学院大学 北京 100049
- 2. 中国科学院兰州化学物理研究所 苏州实验室 羰基合成与选择氧化国家重点实验室 兰州 730000
- 折叠
摘要
以HBpin为硼基化试剂和脱氧剂,以CsF为催化剂实现了伯酰胺的脱水转化,以良好到优秀的产率制备了多种腈类化合物.该方法操作简便,克级放大实验目标产物的产率为96％,且催化体系对多种官能团,如卤素、三氟甲基、杂环和氨基等表现出良好的兼容性,结果表明该方法具有较好的应用潜力.机理研究表明原位生成N-硼基酰胺中间体和氢气释放是反应顺利发生的关键,生成热力学稳定的硼酸酐和腈类产物是这个形式上的酰胺脱水反应的驱动力.
Abstract
HBpin is used as a boronizing reagent and formal dehydrating agent is reported for the first time.CsF was used as a catalyst to achieve the dehydration and conversion of primary amides,and various nitrile compounds were obtained with good to excellent yields.This method is easy to operate,and the yield of the target product in the gram scale amplification experiment is 96％.The catalytic system exhibits good compatibility with various functional groups,such as halogen,trifluo-romethyl,heterocycle,and amino group.These results indicate that this method has good application potential.Mechanism studies have shown that the in-situ generation of N-boroamide intermediates and H2 is the key to the smooth occurrence of the reaction.And,the formation of thermodynamically stable B-O-B anhydride and nitrile product is the driving force of this transformation.
关键词
氟化铯/催化/伯酰胺/腈/硼烷Key words
CsF/catalysis/primary amide/cyanation/borane引用本文复制引用
基金项目
国家自然科学基金(22022204)
国家自然科学基金(21633013)
国家自然科学基金(22072167)
国家自然科学基金(22202218)
出版年
2024
NETL
NSTL
万方数据