To provide a chemical synthetic process which has high profitability and can reduce reaction time and number of steps required for synthesizing a molecule regardless of complexity of the molecule to be manufactured.

This invention relates to the design of a process by intermittent dielectric heating combined with a recycling system. This process consists in subjecting reagents to electromagnetic waves selected in the frequencies ranging between 300 GHz and 3 MHz intermittently using a recycling system. According to this configuration, entire reaction volume is not continuously exposed to the dielectric waves and all molecules of the reaction mixture are intermittently subjected to the field.