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Polymer-supported Palladium Catalysts for Chemoselective Hydrogenation
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- MONGUCHI Yasunari
- Laboratory of Organic Chemistry, Gifu Pharmaceutical University
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- SAJIKI Hironao
- Laboratory of Organic Chemistry, Gifu Pharmaceutical University
Bibliographic Information
- Other Title
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- 高分子担持型機能性触媒の開発
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Description
Palladium catalysts supported on silk-fibroin (Pd/Fib) and polyethyleneimine (Pd/PEI) were developed. Both catalysts were prepared by adsorption of a rust-colored methanol solution of Pd(OAc)2 in polymers and subsequent reduction of Pd(II) to Pd(0) in situ by methanol with or without the help of hydrogen gas. The Pd/Fib catalyst showed an efficient chemoselectivity in hydrogenation of alkynes, alkenes, and azides in the presence of aromatic ketones, aldehydes, and halides, benzyl esters, and N-Cbz protective groups. These functionalities are readily reduced under the Pd/C- or Pd/C(en)-catalyzed hydrogenation conditions. The Pd/PEI could catalyze the partial hydrogenation of di-substituted alkynes to cis-alkenes in a 1:1 mixed solvent of methanol and 1,4-dioxane. It is noteworthy that even mono-substituted alkynes could be reduced to the corresponding alkenes under the Pd/PEI-catalyzed hydrogenation conditions by simply controlling the solvent ratio of methanol and 1,4-dioxane; such reduction was extremely difficult to achieve with any earlier methods.<br>
Journal
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- KOBUNSHI RONBUNSHU
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KOBUNSHI RONBUNSHU 68 (5), 232-241, 2011
The Society of Polymer Science, Japan
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Details 詳細情報について
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- CRID
- 1390001206525410816
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- NII Article ID
- 130004489316
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- COI
- 1:CAS:528:DC%2BC3MXhtFSisL7F
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- ISSN
- 18815685
- 03862186
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- Text Lang
- ja
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed