Nucleophilic Deprotection of <i>p</i>-Methoxybenzyl Ethers Using Heterogeneous Oxovanadium Catalyst
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- Ikeda Rei
- Graduate School of Pharmaceutical Sciences, Osaka University
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- Nishio Tomoya
- Graduate School of Pharmaceutical Sciences, Osaka University
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- Kanomata Kyohei
- Graduate School of Pharmaceutical Sciences, Osaka University
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- Akai Shuji
- Graduate School of Pharmaceutical Sciences, Osaka University
Abstract
<p>Nucleophilic deprotection of p-methoxybenzyl (PMB) [p-methoxyphenylmethyl (MPM)] ethers was developed using a heterogeneous oxovanadium catalyst V-MPS4 and a thiol nucleophile. The deprotection method had a wide reaction scope, including PMB ethers of primary, secondary, and tertiary alcohols bearing various functional groups. In addition, the PMB ether of an oxidation-labile natural product was successfully removed by V-MPS4 catalysis, while a common oxidative method of PMB deprotection afforded a complex mixture. The V-MPS4 catalyst was reusable up to six times without a significant loss in the product yield. The advantages of using the heterogeneous catalyst were further demonstrated by conducting the deprotection reaction in a continuous flow process, which resulted in a 2.7-fold higher catalyst turnover number and 60-fold higher turnover frequency compared to those of the corresponding batch reaction.</p>
Journal
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- Chemical and Pharmaceutical Bulletin
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Chemical and Pharmaceutical Bulletin 72 (2), 213-219, 2024-02-21
The Pharmaceutical Society of Japan
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Keywords
Details 詳細情報について
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- CRID
- 1390299218299627776
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- ISSN
- 13475223
- 00092363
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- HANDLE
- 11094/94660
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- Text Lang
- en
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- Data Source
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- JaLC
- IRDB
- Crossref
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- Abstract License Flag
- Disallowed