Cyclopentyl methyl ether
 | |
| Names | |
|---|---|
| IUPAC name
Methoxycyclopentane | |
| Other names
CPME | |
| Identifiers | |
| 5614-37-9 | |
| ChemSpider | 122157  |
| Jmol interactive 3D | Image |
| PubChem | 138539 |
| |
| |
| Properties | |
| C6H12O | |
| Molar mass | 100.16 g·mol−1 |
| Appearance | Colorless clear liquid |
| Density | 0.86 g/cm3 |
| Melting point | −140 °C (−220 °F; 133 K) |
| Boiling point | 106 °C (223 °F; 379 K) |
| 0.011 g/g | |
| Hazards | |
| Main hazards | Irritant (Xi) |
| Safety data sheet | MSDS |
| EU classification (DSD) |
 Xi |
| NFPA 704 | |
| Flash point | −1 °C (30 °F; 272 K) |
| Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
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| Infobox references | |
Cyclopentyl methyl ether (CPME), also known as methoxycyclopentane, is hydrophobic ether solvent. A high boiling point of 106 °C (223 °F) and preferable characteristics such as low formation of peroxides, relative stability under acidic and basic conditions, formation of azeotropes with water coupled with a narrow explosion range render CPME an alternative to other ethereal solvents such as tetrahydrofuran (THF), 2-methyltetrahydrofuran (2-MeTHF), dioxane (carcinogenic), and 1,2-dimethoxyethane (DME).[1]
Synthesis
The synthesis of this compound can be done in two different ways:
(1) by methylation of the cyclopentanol.
(2) by the addition of methanol to the cyclopentene. This second method is better from the point of view of sustainable chemistry since it does not produce by-products.
Applications
Cyclopentyl methyl ether is used in organic synthesis, mainly as a solvent. However it is also useful in extraction, polymerization, crystallization and surface coating.
Some examples of reactions where it acts as a solvent are:
- Reactions involving alkali agents: nucleophilic substitutions of heteroatoms (alcohols and amines) [2]
- Lewis acids-mediated reactions: Beckmann Reaction, Friedel-Crafts Reaction etc.[3]
- Reactions using Organometallic reagents or basic agents: Claisen condensation, formation of enolates or Grignard reaction.[4]
- Reduction and oxidation.[5]
- Reactions with transition metal catalysts.[6]
- Reactions with azeotropical removal of water: acetalization, etc.[7]
References
- ↑ "Cyclopentyl Methyl Ether as a New and Alternative Process Solvent". Org. Process Res. Dev. 11: 251–258. February 24, 2007. doi:10.1021/op0680136.
- ↑ Ether compounds and polymerizable compounds and manufacturing methods. By: Kiriki, Satoshi.Aug 3, 2015.JP 2015140302
- ↑ Torisawa, Yasuhiro (15 January 2007). "Conversion of indanone oximes into isocarbostyrils". Bioorganic & Medicinal Chemistry Letters 17 (2): 453–455. doi:10.1016/j.bmcl.2006.10.022.
- ↑ Okabayashi, Tomohito; Iida, Akira; Takai, Kenta; Misaki, Tomonori; Tanabe, Yoo (September 18, 2007). "Practical and Robust Method for Regio- and Stereoselective Preparation of (E)-Ketene tert-Butyl TMS Acetals and β-Ketoester-derived tert-Butyl (1Z,3E)-1,3-Bis(TMS)dienol Ethers". The Journal of Organic Chemistry 72 (21): 8142–8145. doi:10.1021/jo701456t.
- ↑ Shimada, Toyoshi; Suda, Masahiko; Nagano, Toyohiro; Kakiuchi, Kiyomi (October 22, 2005). "Facile Preparation of a New BINAP-Based Building Block, 5,5‘-DiiodoBINAP, and Its Synthetic Application". The Journal of Organic Chemistry 70 (24): 10178–10181. doi:10.1021/jo0517186.
- ↑ Molander, Gary A.; Elia, Maxwell D. (November 3, 2006). "Suzuki−Miyaura Cross-Coupling Reactions of Benzyl Halides with Potassium Aryltrifluoroborates". The Journal of Organic Chemistry 71 (24): 9198–9202. doi:10.1021/jo061699f.
- ↑ Azzena, Ugo; Carraro, Massimo; Mamuye, Ashenafi Damtew; Murgia, Irene; Pisano, Luisa; Zedde, Giuseppe (17 April 2015). "Cyclopentyl methyl ether – NH4X: a novel solvent/ catalyst system for low impact acetalization reactions". Green Chemistry 17: 3281–3284. doi:10.1039/c5gc00465a.