Microwave reactions
Microwaves are a type of electromagnetic radiation used as a heat source for performing organic synthesis reactions. The absorption of microwaves produces heat according to the dielectric property of substances.
As it is applicable to a wide range of reaction types, our company uses microwave synthesis equipment for various reactions.
Effectiveness of the microwave reactions
- - Due to rapid heating and strict temperature control, the reaction time is reduced, side reactions are suppressed, and yield is improved.
- - Because no solvent is required, there is uniform heating in solid-phase reactions and the reactions are accelerated due to the direct action on substances.
- - Increase in solubility due to reactions at temperatures higher than the boiling points.
- - Microwave-specific features such as regioselectivity, stereoselectivity, and high levels of crystalization.
| Equipment we possess | Scaling-up is also supported |
|---|---|
| µ Reactor Dimensions: 430 W × 470 D × 470 H 320 W × 265 D × 150 H (controller) |
Batch reactor Dimensions: 2100 W × 710 D × 1280 H |
| - Microwave frequency: 2.45 GHz - Microwave output: 40 - 770 W (variable) - Microwave control: fixed output or automatic temperature control - Microwave mode: multi-mode - Stirrer: integrated electromagnetic stirrer - Optical fiber thermometer for inner temperature control - Reaction capacity: 10 - 200 mL |
- Microwave frequency: 2.45 GHz - Microwave output: 4.5 kW (1.5 kW × 3) - Microwave control: programmable PID control (continuous output or pulse) - Reaction capacity: 6.5 L |
An example of µ Reactor experiments
| No. | Heating method | Solvent | Temperature | Microwave output | Time | Yield |
|---|---|---|---|---|---|---|
| 1 | Oil bath | DME/H2O | reflux | - | 15min | 51.2% |
| 2 | Microwave | DME/H2O | reflux | 70 - 350W | 15min | 78.9%* |
* Target substance was synthesized with a better yield when compared with that obtained using usual heating
Reaction monitor
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