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在温和条件下使用可重复使用的离子液体作为绿色催化剂合成2-氨基苯并恶唑。

The Synthesis of 2-Aminobenzoxazoles Using Reusable Ionic Liquid as a Green Catalyst under Mild Conditions.

作者信息

Zhou Ya, Liu Zhiqing, Yuan Tingting, Huang Jianbin, Liu Chenjiang

机构信息

School of Chemistry and Chemical Engineering, Xinjiang University and Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education, Urumqi 830046, China.

Physics and Chemistry Detecting Center, Xinjiang University, Urumqi 830046, China.

出版信息

Molecules. 2017 Apr 2;22(4):576. doi: 10.3390/molecules22040576.

DOI:10.3390/molecules22040576
PMID:28368328
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6154564/
Abstract

A facile, green, and efficient method for the direct oxidative amination of benzoxazoles using heterocyclic ionic liquid as catalyst has been developed. The reaction proceeded smoothly at room temperature and gave the desirable 2-aminobenzoxazoles with good to excellent yields (up to 97%). The catalyst 1-butylpyridinium iodide can be easily recycled and reused with similar efficacies for at least four cycles.

摘要

已开发出一种简便、绿色且高效的方法，以杂环离子液体为催化剂直接氧化苯并恶唑进行胺化反应。该反应在室温下顺利进行，可得到产率良好至优异（高达97%）的理想2-氨基苯并恶唑。催化剂碘化1-丁基吡啶可轻松回收并重复使用，且至少四个循环内具有相似的效率。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b479/6154564/d0c0aaf7539f/molecules-22-00576-sch005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b479/6154564/de9059ed4d13/molecules-22-00576-sch001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b479/6154564/aa51db4c1d11/molecules-22-00576-sch002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b479/6154564/7fb7dc8d9441/molecules-22-00576-sch003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b479/6154564/d9f95d8f9803/molecules-22-00576-sch004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b479/6154564/941b3f02f881/molecules-22-00576-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b479/6154564/d0c0aaf7539f/molecules-22-00576-sch005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b479/6154564/de9059ed4d13/molecules-22-00576-sch001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b479/6154564/aa51db4c1d11/molecules-22-00576-sch002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b479/6154564/7fb7dc8d9441/molecules-22-00576-sch003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b479/6154564/d9f95d8f9803/molecules-22-00576-sch004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b479/6154564/941b3f02f881/molecules-22-00576-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b479/6154564/d0c0aaf7539f/molecules-22-00576-sch005.jpg

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Metal-free N-arylation of secondary amides at room temperature.
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