Microscale Synthesis of Esters Utilizing Solid Acid: Development of Sustainable Chemistry Teaching Programs on the Theme of “Aromas”

Abstract

Green Sustainable Chemistry (GSC) refers to the concept of pursuing chemistry that is friendly to humans and the environment while supporting the development of a sustainable society. In the field of chemistry education, “micro-scale experiments”, which are designed to reduce the consumption of reagents, are one of the key components in the development of teaching materials based on GSC principles. The authors, therefore, designed an experimental teaching program on the theme of “aromas” and investigated the reaction conditions for the synthesis of esters, which are typical examples of organic compounds with aromas. In the experimental class, esters were first synthesized safely using a solid acid catalyst. Then, the students were asked to describe and compare the smells of various fragrances used in their daily lives. The students were also taught that most of these aromas are supplied via chemical synthesis, which has less impact on the environment. Analysis of the students’ comments showed that they were highly satisfied with the experiment. Through smelling various fragrances, the students became more aware of the natural and living environment.