Journal
CHEMICAL REVIEWS
Volume 118, Issue 2, Pages 679-746Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.chemrev.7b00417
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Funding
- JSPS KAKENHI [15H05698]
- Global COE Program
- Japan Science Technology Agency (JST)
- JSPS
- University of Tokyo, MEXT, Japan
- Grants-in-Aid for Scientific Research [15H05698] Funding Source: KAKEN
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Traditional organic synthesis relies heavily on organic solvents for a multitude of tasks, including dissolving the components and facilitating chemical reactions, because many reagents and reactive species are incompatible or immiscible with water. Given that they are used in vast quantities as compared to reactants, solvents have been the focus of environmental concerns. Along with reducing the environmental impact of organic synthesis, the use of water as a reaction medium also benefits chemical processes by simplifying operations, allowing mild reaction conditions, and sometimes delivering unforeseen reactivities and selectivities. After the watershed in organic synthesis revealed the importance of water, the development of water-compatible catalysts has flourished, triggering a quantum leap in water-centered organic synthesis. Given that organic compounds are typically practically insoluble in water, simple extractive workup can readily separate a water-soluble homogeneous catalyst as an aqueous solution from a product that is soluble in organic solvents. In contrast, the use of heterogeneous catalysts facilitates catalyst recycling by allowing simple centrifugation and filtration methods to be used. This Review addresses advances over the past decade in catalytic reactions using water as a reaction medium.
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