Expansion of Substrate Scope for Nitroxyl Radical/Copper-Catalyzed Aerobic Oxidation of Primary Alcohols: A Guideline for Catalyst Selection
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- Sasano Yusuke
- Department of Organic Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University
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- Yamaichi Aoto
- Department of Organic Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University
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- Sasaki Ryota
- Department of Organic Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University
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- Nagasawa Shota
- Department of Organic Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University
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- Iwabuchi Yoshiharu
- Department of Organic Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University
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Abstract
<p>Four distinctive sets of optimum nitroxyl radical/copper salt/additive catalyst combinations have been identified for accommodating the aerobic oxidation of various types of primary alcohols to their corresponding aldehydes. Interestingly, less nucleophilic catalysts exhibited higher catalytic activities for the oxidation of particular primary allylic and propargylic alcohols to give α,β-unsaturated aldehydes that function as competent Michael acceptors. The optimum conditions identified herein were successful in the oxidation of various types of primary alcohols, including unprotected amino alcohols and divalent-sulfur-containing alcohols in good-to-high yields. Moreover, N-protected alaninol, an inefficient substrate in the nitroxyl radical/copper-catalyzed aerobic oxidation, was oxidized in good yield. On the basis of the optimization results, a guideline for catalyst selection has been established.</p>
Journal
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- Chemical and Pharmaceutical Bulletin
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Chemical and Pharmaceutical Bulletin 69 (5), 488-497, 2021-05-01
The Pharmaceutical Society of Japan
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Details 詳細情報について
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- CRID
- 1390287907270128128
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- NII Article ID
- 130008032775
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- NII Book ID
- AA00602100
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- ISSN
- 13475223
- 00092363
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- NDL BIB ID
- 031424639
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- PubMed
- 33952858
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- PubMed
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed